m26-14151-en_rev a[1]

8/7/2019 M26-14151-EN_Rev A[1]

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Instron

2505 Series Flexural and

Interlaminar Shear

Test Fixture

Reference Manual - Equipment

M26-14151-EN Revision A

www.instron.com

8/7/2019 M26-14151-EN_Rev A[1]


Electromagnetic Compatibility

Where applicable, this equipment is designed to comply with International Electromagnetic Compati-

bility (EMC) standards.

To ensure reproduction of this EMC performance, connect this equipment to a low impedance ground

connection. Typical suitable connections are a ground spike or the steel frame of a building.

Proprietary Rights Notice

This document and the information that it contains are the property of Instron Corporation. Rights to

duplicate or otherwise copy this document and rights to disclose the document and the information that

it contains to others and the right to use the information contained therein may be acquired only by

written permission signed by a duly authorized officer of Instron Corporation.

Trademarks

Instron®, Instron Logo, Dynatup®, Shore®, Wilson®, Rockwell®, and Brale® are registered trademarks

of Instron Corporation. Satec™ and other names, logos, icons, and marks identifying Instron products

and services referenced herein are trademarks of Instron Corporation. These trademarks may not be

used without the prior written permission of Instron.

Other product and company names used herein are trademarks or trade names of their respective

companies.

© Copyright 2004 Instron Corporation

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iii

Preliminary Pages

General Safety Precautions

Materials testing systems are potentially hazardous.

Materials testing involves inherent hazards from high forces, rapid motions and

stored energy. You must be aware of all moving and operating components that

are potentially hazardous, particularly the actuator in a servohydraulic testing

system or the moving crosshead in an electromechanical testing system.

Whenever you consider that safety is compromised, press the Emergency Stop

button to stop the test and isolate the testing system from hydraulic or electrical

power.

Carefully read all relevant manuals and observe all Warnings and Cautions. The

term Warning is used where a hazard may lead to injury or death. The termCaution is used where a hazard may lead to damage to equipment or to loss of

data.

Ensure that the test set-up and the actual test you will be using on materials,

assemblies or structures constitutes no hazard to yourself or others. Make full

use of all mechanical and electronic limits features. These are supplied to enable

you to prevent movement of the actuator piston or the moving crosshead beyond

desired regions of operation. Limits provide protection for your specimen and

machine and reduce potential hazard.

The following pages detail various general warnings that you must heed at all

times while using materials testing equipment. You will find more specificWarnings and Cautions in the text whenever a potential hazard exists.

Your best safety precautions are to obtain training in the testing equipment that

you are using and to read your Operating Instructions and Reference Manual(s)

to gain a thorough understanding of that equipment.

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Preliminary Pages M26-14151-EN

iv

Warnings

High/Low Temperature Hazard - Wear protective clothing when handlingequipment at extremes of temperature.

Materials testing is often carried out at non-ambient temperatures using ovens,

furnaces or cryogenic chambers. Extreme temperature means an operating

temperature exceeding 60 °C (140 °F) or below 0 °C (32 °F). You must use

protective clothing, such as gloves, when handling equipment at these

temperatures. Display a warning notice concerning low or high temperature

operation whenever temperature control equipment is in use. You should note

that the hazard from extreme temperature can extend beyond the immediate area

of the test.

Crush Hazard - Take care when installing or removing a specimen,assembly or structure.

Installation or removal of a specimen, assembly or structure involves working

inside the hazard area between the grips or fixtures. Keep clear of the jaws of a

grip or fixture at all times. Keep clear of the hazard area between the grips or

fixtures during actuator or crosshead movement. Ensure that all actuator or

crosshead movements necessary for installation or removal are slow and, where

possible, at a low force setting.

Explosion Hazard - Wear eye protection and use protective shields or

screens whenever any possibility exists of a hazard from the failure of a

specimen, assembly or structure under test.

Wear eye protection and use protective shields or screens whenever a risk of

injury to operators and observers exists from the failure of a test specimen,

assembly or structure, particularly where explosive disintegration may occur.

Due to the wide range of specimen materials, assemblies or structures that may

be tested, any hazard resulting from the failure of a test specimen, assembly or

structure is entirely the responsibility of the owner and the user of the

equipment.

Hazard - Ensure components of the load string are correctly pre-loaded to

minimize the risk of fatigue failure.

Dynamic systems, especially where load reversals through zero are occurring,are at risk of fatigue cracks developing if components of the load string are not

correctly pre-loaded to one another. Apply the specified torque to all load string

fasteners and the correct setting to wedge washers or spiral washers. Visually

inspect highly stressed components such as grips and threaded adapters prior to

every fatigue test for signs of wear or fatigue damage.

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v

Preliminary Pages

Table of Contents

Chapter 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Lower Roller Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Upper Roller Assembly for the Three-Point Bend Application. . . . . . . . . . . . . 1-5

Upper Roller Assembly for the Four-Point Bend Application. . . . . . . . . . . . . . 1-6

Chapter 2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Catalog Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Applicable Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Flexure Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Interlaminar Shear Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Fixture Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2505-249 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Forming Rollers 2506-491. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Forming Rollers 2506-492. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Forming Rollers 2506-493. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

3 to 4-Point Conversion Kit 2506-494 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Chapter 3 Installation and Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Installing the Lower Roller Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Installing the Upper Roller Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Setting Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Selecting the Correct Rollers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Fitting the Lower Rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Setting the Lower Rollers Span. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Fitting the Upper Roller (3-Point Bend Only). . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Fitting the Upper Rollers (4-Point Bend Only). . . . . . . . . . . . . . . . . . . . . . . . . 3-7

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vi

Setting the Upper Rollers Span (4-Point Bend Only) . . . . . . . . . . . . . . . . . . . 3-7

Chapter 4 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Positioning a Test Specimen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Running a Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Before Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Changing your Test Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

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vii

Preliminary Pages

List of Illustrations

Figure 1-1. Fixture Set Up for ASTM Flexure Test with 150 mm Specimen . . . . . . . . . . . 1-3

Figure 1-2. Lower Roller Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Figure 1-3. Upper Roller Assembly for the Three-Point Bend Application . . . . . . . . . . . . 1-5

Figure 1-4. Optional Four-Point Bend Conversion Upper Anvil Assembly . . . . . . . . . . . . 1-6

Figure 2-1. Forming Rollers 2506-491 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4




Figure 3-1. Installing the Lower Roller Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Figure 3-2. Installing the Upper Anvil Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Figure 4-1. Positioning a Test Specimen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

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viii

Three-Point Bend Fixture

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1-1

I

ntroductionChapter 1

Introduction

Outline

This chapter introduces the Instron 2505 Series Flexural and Interlaminar Shear

Test Fixture. It describes the purpose of the fixture, the difference between the

three and four-point upper roller assemblies, and describes each fixture

component and its relationship with other components. It includes the following

sections:

• About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

• Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

• Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

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About This Manual M26-14151-EN

1-2

About This Manual

This manual provides you with descriptions, specifications, and installation

procedures for the following Instron catalog numbers:

Note: Illustrations in this manual are generic unless labelled otherwise and

therefore do not necessarily show the exact roller size for your application.

Catalog Number Description

2505-429 10kN Flexural and Interlaminar Shear Test Fixture

2506-491

Forming rollers to:

ASTM D790

and

D2344

Lower Radius

3.2mm (0.125 in)

and

1.6mm (0.063 in)

Upper Radius

3.2mm (0.125 in)

2506-494

Optional Four-Point

Bend Conversion Kit

for ASTM D790

Span adjustable 60 mm (2.36 in) max

2506-492Forming rollers to:

BS2782

Lower Radius

2mm

and

3mm

Upper Radius

5 mm

and

3 mm

2506-493

Forming rollers to

DIN29971

CRAG2.1, 2.2

Lower Radius

5 mm

and

3mm

Upper Radius

12.5 mm,

5 mm and

3 mm

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1-3

Purpose

I

ntroductionPurpose

The flexural and interlaminar shear test fixture is designed primarily to perform

tests to measure the modulus, flexural strength and interlaminar shear strength of

unidirectional and crossply fibre composites. The fixture is easy to install and set

up. An optional kit facilitates easy conversion from 3-point to 4-point loading.

The specimen is supported on two lower rollers while a single upper roller applies

the load for a three-point bend test. For a four-point bend test, an upper roller

assembly comprising twin upper rollers to apply the load. Figure 1-1 illustrates

the Three-Point Bend Fixture.

Figure 1-1. Fixture Set Up for ASTM Flexure Test with 150 mm Specimen

55 1515 2525 3535 4545 5555 6565 7575

Upper Roller Assembly

Lower Roller Assembly

Specimen

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Description M26-14151-EN

1-4

Description

The fixture comprises two major components:

• The Lower Roller Assembly

• The Upper Roller Assembly. This assembly has two variants:

• 3-point bend

• 4-point bend

Lower Roller Assembly

Referring to Figure 1-2, the Lower Roller Assembly supports the specimen on

two hardened stainless steel Lower Forming Rollers. Each roller has two sizes of

Figure 1-2. Lower Roller Assembly

55 1515 2525 3535 4545 5555 6565 7575

Lower Forming RollersThumb Screw

Specimen Stop

Anvil Mounting

Lower Adaptor

M48 x 2 RH Lock Nut

Knurled Hand Wheel

Lead Screw

(Left Hand Thread)

Lead Screw

Right Hand Thread)

End Plate

Slide Plate

Locking Slide

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1-5

Description

I

ntroduction

roller and is reversible to allow you to conduct both flexure and interlaminar shear

tests according to the standards. Each roller is held in an Anvil Mounting which

rests on the Slide Plate. A Knurled Hand Wheel is fixed to a Lead Screw which is

supported by End Plates that are attached to the Slide Plate.

The Lead Screw has a left hand thread one end and a right hand thread the other

that engage the left hand and right hand Anvil Mountings respectively. Rotating

the Lead Screw drives the Anvil Mountings in opposite directions. An engraved

scale on the Slide Plate on the Anvil Mountings indicate the distance in

millimeters between the centre of each of the inner lower rollers and the centre of

the Slide Plate, i.e. When the scale reads 30mm the rollers are 60mm apart.

The lower anvils also feature Specimen Stops that can be fitted to either end of

each roller. The stops facilitate repeatable specimen alignment with respect to the

rollers.

The Lower Roller Assembly terminates in a standard Instron clevis connector. See“Installing the Lower Roller Assembly” on page 3-4. The lock nut gives

rigidity to the load string when tightened as instructed.

Upper Roller Assembly for the Three-Point Bend Application

When attached to the load cell of the load frame, the Upper Roller Assembly for a

three-point bend application applies the load on the specimen via a single

hardened stainless steel roller.

Figure 1-3. Upper Roller Assembly for the Three-Point Bend Application

Upper Roller Housing

Lock Nut

Upper Roller

Male Clevis

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1-6

Referring to Figure 1-3, The Roller is a push fit in the Roller Housing. The Male

Clevis has groove at the bottom to accept a grub screw located in the Roller

housing.

The Upper Roller Assembly terminates in a standard Instron clevis connector. The

Upper Roller is aligned with the lower rollers during set up and then locked in

place. See “Installing the Upper Roller Assembly” on page 3-5. The lock nut

gives rigidity to the load string when tightened as instructed.

Upper Roller Assembly for the Four-Point Bend Application

The Upper Roller Assembly for the Four-Point Bend Application is shown in

Figure 1-4. When attached to the load cell, it applies the load on the specimen

via two hardened stainless steel rollers.

The Upper Rollers rest against the Roller Supports and are held in place by the

Upper Springs. The supports can slide laterally in the Upper Body to allow

adjustment of the span. Each support is secured in position by two socket head cap

screws.

Figure 1-4. Optional Four-Point Bend Conversion Upper Anvil Assembly

110 11090 9070 7050 5030 30

Roller Support

Upper Roller

Upper Spring

Lock Nut

Upper Body

Adaptor Nut

Adaptor

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1-7

Description

I

ntroduction

The scale on the Upper Body indicates the span between the two Upper Rollers in

millimeters. The scale is read against the inside edge of the supports and is

graduated such that when each support position is the same on the scale, the roller

centres are that distance apart, e.g. 30 mm as illustrated.

The Adaptor Nut is attached to the Upper body and the Adaptor Screws into the

Adaptor Nut.

The Upper Roller Assembly terminates in a standard Instron clevis connector. The

Upper Rollers are aligned with the lower rollers during set up and then locked in

place. See “Installing the Upper Roller Assembly” on page 3-5. The lock nut

gives rigidity to the load string when tightened as instructed.

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1-8

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2-1

Specifications

Chapter 2

Specifications

Outline

This chapter contains data for the 2505 series Flexural and Interlaminar Shear Test

Fixture and accessories. It includes the following sections:

• Catalog Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

•Applicable Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

• Fixture Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

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Catalog Numbers M26-14151-EN

2-2

Catalog Numbers

Applicable Standards

Caution

Always refer to the published standards

The data in this section is given in good faith as a quick reference. Instron does

not accept liability for faulty test results caused by using the data. Always check

with the officially published standards.

Catalog Number Description

2505-429 10kN Flexural and Interlaminar Shear Test Fixture

2506-491

Forming rollers to:

ASTM D790

and

D2344

Lower Radius

3.2mm (0.125 in)

and

1.6mm (0.063 in)

Upper Radius

3.2mm (0.125 in)

2506-494

Optional Four-Point

Bend Conversion Kit

for ASTM D790

Span adjustable 60 mm (2.36 in) max

2506-492Forming rollers to:

BS2782

Lower Radius

2mm

and

3mm

Upper Radius

5 mm

and

3 mm

2506-493

Forming rollers to

DIN29971

CRAG2.1, 2.2

Lower Radius

5 mm

and

3mm

Upper Radius

12.5 mm,

5 mm and

3 mm

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2-3

Applicable Standards

Specifications

Flexure Tests

Interlaminar Shear Tests

Method

SpecimenSpan Ratio

(Span:Height)

Lower

Roller

Diameter

(mm)

Upper

Roller

Diameter

(mm)r

Speed

(mm/min)

Width

(mm)

Height

(mm)

Length

(mm)

ASTM 3pt

25 2 50 16:1 6.4 6.4 0.9

25 2 80 32:1 6.4 6.4 3.4

25 2 100 40:1 6.4 6.4 5.3

25 2 150 60:1 6.4 6.4 12.0

ASTM 4pt

(1/3, 1/3, 1/3)

25 2 150 Upper 20:1 6.4 6.4 13.3

25 2 150 Lower 60:1 6.4 6.4 13.3

ASTM 4pt

(1/4, 1/2.,1/4)

25 2 150 Upper 30:1 6.4 6.4 12.0

25 2 150 Lower 60:1 6.4 6.4 12.0

BSI 3pt 15 2 50 16:1 4 10 1.0

DIN 3pt 10 2 100 40:1 10 25 6.0

AFNOR 3pt 10 2 100 40:1 10 25 5.0

CRAG 3pt 10 2 100 40:1 10 25 5.0

Method

SpecimenSpan Ratio

(Span:Height)

Lower

Roller

Diameter

(mm)

Upper

Roller

Diameter

(mm)

Speed

(mm/min)Width

(mm)

Height

(mm)

Length

(mm)

ASTM 10 2 14 5:1 3.2 6.4 1.3

BSI 10 2 12 5:1 6 6 1.0

DIN 10 2 20 5:1 6 6 1.0

AFNOR 10 2 20 5:1 6 6 1.0

CRAG 10 2 210 5:1 6 6 1.0

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Fixture Components M26-14151-EN

2-4

Fixture Components

2505-249

Note: Fixture needs at least one set of forming rollers

Forming Rollers 2506-491

Table 2-1. General Specifications

Parameter Specification

Capacity 10 kN (2250 lb)

Span Distance (Adjustable) 10 mm to 150 mm (0.4 in to 5.9 in)

Upper Roller Assembly Load Frame Fitting 6 mm (0.24 in) Clevis Pin (Type 0m)

Lower Roller Assembly Load Frame Fitting 16 mm (0.63 in) Clevis Pin (Type 1m)

Temperature Range -70° to 350° C (-94° to 662° F)

Width 225 mm (8.86 in)

Weight 8 kg (19 lb)

Figure 2-1. Forming Rollers 2506-491

Item T8593R-1003

6.4 mm

DiameterItem T8593R-1002

Item T8593R-1001

3.2 mm

Diameter

6.4 mm

Diameter

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2-5

Fixture Components

Specifications




Item T8594R-1003

6.0 mm


Item T8594R-1001

4.0 mm

Diameter

6.0 mm

Diameter


Item T8595R-1003

6.0 mm


Item T8594R-1001

10.0 mm

Diameter

Item T8595R-1002

Item T8595R-1001

10.0 mm

Diameter

25.0 mm

Diameter

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Fixture Components M26-14151-EN

2-6

3 to 4-Point Conversion Kit 2506-494


6 mm Diameter Roller

Item T10 mm Diameter Roller

Item T1122-2043


Item T1122-1041

Upper Spring

25 mm Diameter RollerItem T1122-1047

Upper Spring


Item T1122-1049

Upper Spring

6 mm Diameter RollerItem T8600-10001

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3-1

Installation and

Set Up

Chapter 3

Installation and Set Up

Outline

This chapter contains instructions for installing and setting up the fixture on a load

frame. It includes the following sections:

• General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

•Installing the Lower Roller Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

• Installing the Upper Roller Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

• Setting Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

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General M26-14151-EN

3-2

General

Warning

The installation of the fixture on a load frame comprises:

• Installing the Lower Roller Assembly

• Installing the Upper Roller Assembly for 3-point bend or 4-point bend.

Setting up the fixture for testing comprises:

• Selecting and fitting the correct upper and lower rollers for your test.

• Setting the lower roller span

• 4-point bend only - Setting the upper roller span

Refer to the following sections for detailed information on the above procedures.

Equipment

You need the following items:

A soft cloth

A metric hex key wrench set

4-point bend only - A flat bladed screwdriver

Before You Begin

Check for the following conditions:

There is enough room between the load cell and the load frame base to install

the fixture.

Crush Hazard - Take care when installing or removing a fixture or its

components.

Installation or removal of a fixture or its components involves working insidethe hazard area between the fixture rollers. Keep clear of the fixture rollers at alltimes. Keep clear of the hazard area between the fixture rollers during actuatoror crosshead movement. Ensure that all actuator or crosshead movementsnecessary for installation or removal are slow and, where possible, at a lowforce setting.

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3-3

General

Installation and

Set Up

The testing system is in standby mode.

The testing system extension limits are set to prevent the upper and lower

anvil assemblies from colliding.

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Installing the Lower Roller Assembly M26-14151-EN

3-4

Installing the Lower Roller Assembly

1. Use the soft cloth to wipe any dirt or debris from mating surfaces of the anvil

assemblies, load cell and load frame base.

2. Referring to Figure 3-1, carefully place the Lower Roller Assembly into the

Base Adaptor located on the base of the load frame .

3. Rotate the assembly so that the scale faces the front of the load frame and the

clevis holes are aligned.

4. Insert the Clevis Pin through the holes and secure in position with the ClevisPin Clip.

5. Tighten the Lock Nut against the Base Adaptor.

Note: Before you can begin testing, you must select and fit the correct rollers.See “Setting Up” on page 3-6 .

Figure 3-1. Installing the Lower Roller Assembly

55 1515 2525 3535 4545 5555 6565 7575

Base Adaptor

Lower Roller AssemblyLock Nut

Clevis Pin

Load Frame Base

Clevis Pin Clip

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3-5

Installing the Upper Roller Assembly

Installation and

Set Up

Installing the Upper Roller Assembly

1. Referring to Figure 3-2, insert the Upper Roller Assembly (Three-Point or

Four-Point) into the Female Clevis on the load cell.

2. Rotate the Upper Roller Assembly until the Upper Roller(s) is parallel with

the Lower Rollers and the clevis holes are aligned. For the 4-Point assembly,

rotate the Upper Roller Assembly so that the scale faces the front of the

machine and the clevis holes are aligned.

3. Insert the 6 mm Clevis Pin through the holes and secure in position with the

Clevis Pin Clip.

4. Tighten the Lock Nut against the Female Clevis on load cell.

Note: Before you can begin testing, you must select and fit the correct rollers.See “Setting Up” on page 3-6 .

Figure 3-2. Installing the Upper Anvil Assembly

110 11090 9070 7050 5030 30

Lower

Roller

Assembly

Lock Nut

Female Clevis

Clevis Pin Clip

6 mm Clevis Pin

4-Point Bend

3-Point Bend

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Setting Up M26-14151-EN

3-6

Setting Up

Selecting the Correct Rollers

Consult your test standard for the required dimension of roller(s) for your test and

identify the item numbers that correspond to them by referring to the

“Specifications” chapter. The rollers have the item number or roller diameter

engraved upon them. Select the required items.

Fitting the Lower Rollers

1. Loosen and remove the cap head screw retaining the stop in each of the lower

rollers.

2. Loosen and remove the two cap head screws in each of the lower rollers.

3. Remove the existing rollers

4. Place the pair of new rollers in position. The rollers must be placed with the

size you require towards the centre of the fixture.

Note: Failiure to position the rollers correctly wil prevent you from setting the correct span.

5. Secure the rollers using the two cap head screws previously removed

6. Secure the stops to the rear of the inner rollers with the cap head screws

previously removed.

Setting the Lower Rollers Span

1. Loosen the Thumb Screws on each of the Anvil Mountings.

2. Rotate the Knurled Hand Wheel until the engraved marks on the Anvil

mountings match the desired span as shown on the scale.

3. Tighten the Thumb Screws on each of the Anvil Mountings.

Fitting the Upper Roller (3-Point Bend Only)

1. Loosen the set screw in the Roller housing until the housing is free of the

Male Clevis.

2. Position the new Roller Housing over the Male Clevis and tighten the set

screw enough to engage it in the groove of the Clevis.

3. Rotate the Housing until the Upper Roller is parallel to the Lower Rollers.

4. Tighten the set screw so that it grips the Clevis.

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3-7

Setting Up

Installation and

Set Up

5. Check the alignment of the Upper and Lower Rollers.

Fitting the Upper Rollers (4-Point Bend Only)

1. Pull the two Upper Rollers vertically downwards to free them from the UpperSprings.

2. Loosen and remove the four pan head screws that retain the Upper Springs.

3. Remove the pan head screws from the existing Springs and insert them in the

loop of the new Springs.

4. Insert the panhead screws into the Roller Supports. Do no tighten them

completely.

5. Clip the new Upper Rollers into the Upper Springs.

6. Tighten the pan head screws.


Setting the Upper Rollers Span (4-Point Bend Only)

1. Support the Upper Body, loosen and remove the cap head screw holding the

Upper Body to the Adaptor Nut.

2. Remove the Upper Body and loosen the four caphead screws holding the

Roller Supports to the Upper Body.

3. Slide the Roller supports until the required span is achieved as indicated by

the inner edge of the Support against the scale.

4. Tighten the four cap head screws finger tight only. Check that the span iscorrect and the Upper Rollers are parrallel.

5. Fully tighten the four caphead screws.

6. Replace the Upper Body under the Adaptor Nut ,insert the retaining cap head

screw and tighten finger tight.

7. Rotate the Upper Body until the Upper Rollers are parallel with the Lower

Rollers.

8. Fully tighten the cap head screw.


Note: For wider spans, it is possible to gain access to the Roller Support cap head screws without removing the the Upper Body from the Adaptor Nut.

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Setting Up M26-14151-EN

3-8

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4-1

Testing

Chapter 4

Testing

Outline

This chapter includes the following sections:

• Positioning a Test Specimen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

• Running a Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

• Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Warnings

Crush Hazard - Take care when installing or removing a specimen.

Installation or removal of a specimen involves working inside the hazard areabetween the fixture rollers. Keep clear of the fixture rollers at all times. Keepclear of the hazard area between the fixture rollers during actuator or crossheadmovement. Ensure that all actuator or crosshead movements necessary forinstallation or removal are slow and, where possible, at a low force setting.

Explosion Hazard - Wear eye protection and use protective shields or

screens whenever any possibility exists of a hazard from the failure of a

specimen, assembly or structure under test.

Wear eye protection and use protective shields or screens whenever a risk of

injury to operators and observers exists from the failure of a test specimen,

assembly or structure, particularly where explosive disintegration may occur.

Due to the wide range of specimen materials that may be tested, any hazard

resulting from the failure of a test specimen is entirely the responsibility of the

owner and the user of the equipment.

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Positioning a Test Specimen M26-14151-EN

4-2

Positioning a Test Specimen

Caution

Failure to place the specimen against the two stops will affect your test

data.

The specimen is cut so that the direction of the fibres is longitudinal. If specimens

are not aligned correctly in the fixture your test results will be incorrect.

Place the specimen on the Lower Rollers as shown in Figure 4-1. Ensure that the

specimen is placed directly against both Stops.

Note: Lateral positioning is not critical, but you should endeavour to keep your

specimen central.

When the specimen is properly positioned in the fixture, it is ready for testing.

Figure 4-1. Positioning a Test Specimen

Lower Roller

Specimen

Stop

M3 Cap Head Screw

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4-3

Running a Test

Testing

Running a Test

Caution

Set extension limits on the load frame before starting a test. Failure to set

limits may cause damage to test fixtures.

Refer to the reference material (manuals and online help) for your load frame and

software platform to properly set up the load frame and test procedure.

Note: When using Bluehill, Merlin or Series IX software, you will need to use the Flexure Test Template to set up a test method.

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Maintenance Procedures M26-14151-EN

4-4

Maintenance Procedures

A build-up of test debris on the fixture may create unnecessary wear on

components and specimens and may cause inaccurate test results. Keep the fixture

and the surrounding test area clean.

Before Testing

• Visually inspect the rollers for any signs of wear or cracks. Do not use the

fixture if cracks or any signs of deterioration appear. Contact your nearest

Instron Service representative regarding repair or replacement services.

• Wipe the rollers with a soft cloth to remove any testing debris.

• Check that all screws are snug and tighten as necessary.

Changing your Test Set Up

• Clean all components thoroughly when changing fixture components

• Check that the Lead Screw is operating smoothly and lubricate with light oil

as necessary.

• Store the upper and lower rollers in the case provided when not in use.

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m26-14151-en_rev a[1]

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