Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 1

Welcome Scientists!

at the University of Applied Sciences Augsburg

at the Faculty of Mechanical and Process Engineering

Lecturer: Prof. Ulrich Thalhofer

www.hs-augsburg.de/~thalhof

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 2

Short Introduction to CFRP and Simulation

1 Carbon Fiber Reinforced Plastic 2 Simulation

Contents of this lecture

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 3

1 Carbon Fiber Reinforced Plastic1.1 What it is

commons.wikimedia.org

www.carbonmods.co.uk

en.wikipedia.org

img27.fansshare.com

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 4

1 Carbon Fiber Reinforced Plastic1.1 What it is

mt-aerospace.com

compositesworld.com

zoltek.com

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 5

1 Carbon Fiber Reinforced Plastic1.1 What can be done with it

reitturniere.de

bicycledesign.net

augsburger-allgemeine.de

commons.wikimedia.org

amazon.de

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 6

1 Carbon Fiber Reinforced Plastic1.1 What can be done with it

zeit.de

flugrevue.de

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 7

1 Carbon Fiber Reinforced Plastic1.3 Why we use it

steel 7,85 g/cm³

CFRP 1,5 g/cm³

tcs-ren.de

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 8

1 Carbon Fiber Reinforced Plastic1.3 Some more Properties

ndt.net

Steel or aluminum:

In all directions the same properties

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 9

1 Carbon Fiber Reinforced Plastic1.4 Examples

0°

90°

0.02 mm

100 x 100 x 0.4

Upper side constrained,load 1000 N

2.1 mm

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 10

1 Carbon Fiber Reinforced Plastic1.4 Examples

45°

1.14 mm

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 11

1 Carbon Fiber Reinforced Plastic1.4 Examples

2 Layers: 0°90°

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 12

2.1 Circle or Quad

2 Numerical Methods

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 13

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 14

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 15

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 16

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 17

2.2 Surfaces

Surface area = 20

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 18

Surface area = 8

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 19

How large is the area?

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 20

Is it a litte bit easier now?

area = 6.9

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 21

How can it be done by a computer?

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 22

Smaller surfaces - better results!

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 23

2.3 And now lets look at a 3D-structure

V = 31 415,9 mm³

m = 0,247 kg (steel)

volume of a cylinderradius = 10 mmlength = 100 mm

mass?

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 24

Approximated:

V = 30 901,7 mm³

m = 0,243 kg (steel)

Using small tetrahedons

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 25

a litte bit more complicated ...

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 26

exact: V = 22 047 mm³ m = 0,1731 kg

approximated: V = 22 023 mm³ m = 0,1729 kg

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 27

2.4 Finite Elements for calculating the behaviour of real structures

bridge

Model of the bridge

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 28

pupil

lecturer

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 29

2400 x 300 x 30 mm

Force (weight)

support

support

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 30

2400 x 300 x 60 mm

force (weight)

support

support

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 31

There is a relationship between

force and displacement

force = k ⋅ displacement ( F = k ⋅ u )

k = stiffness factor

is k large than u gets smaller

Scientists' Camp Premium Aerotec / HSA

University of Applied Sciences Augsburg / Faculty of Mechanical and Process Engineering / Thalhofer 32

k depends on ...

material ?

geometry?

wood, steel, CFRP

Thicker structure , ...