45th AIAA/ASME/ASCE/AHS/ASC

Structures, Structural Dynamics and Materials Conference

April 19-22, 2004

Structures TC Session StatusFall TC Meeting Report

Steve EngelstadLockheed Martin Aeronautics Company

Marietta, GA

Summary

• Conference Overview

• Structures Review Statistics

• Special Sessions

• Technical Sessions

Conference Overview

Chairs

2004 SDM General Chair

Patrick J. Goggin

Boeing Company

2401 E. Wardlow Rd.

Mail Code C078-00209

Long Beach, CA 90807-4418

562/593-2617

Email: patrick.goggin@boeing.com C

2004 SDM Technical Chair

Donald L. Kunz

CDR, USAAMCOM

ATTN: AMSAM-RD-AE-A (Donald L. Kunz)

Building 4488, Room B-367

Redstone Arsenal, AL 35898-5000

256/319-5288 • 256/705-9895 FAX

Email: Donald.Kunz@rdec.redstone.army.mil

Conference Overview

• Theme– Structures, Structural Dynamics, and

Materials – From Conception to Application

• Speakers– Industry, Government, Academia,

International?

Conference Overview• 45th AIAA/ASME/ASCE/AHS/ASC Structures, Structural

Dynamics and Materials Conference• 12th AIAA/ASME/AHS Adaptive Structures Conference (Greg

Agnes and Lee Peterson )• There will be two Forums

– Non-Deterministic Approaches (Chris Chamis & Levon Minnetyan)– Gossamer Spacecraft (Eric Flint & Rich Pappa)

• TC’s are responsible for:– Review of all papers in their area– Preliminary Layout of Sessions– List of names/address/email/phone for Session Chairs & Co-Chairs– Prioritization of each Session (give each session a different priority

number)– Indicate Plenary Sessions and Student Papers

Abstract Review Procedures & Dates(Includes SDM, ASC, DSM and Forums)

• Abstract reviews will be handled electronically like last year

• Abstracts – published due date is 1 Aug 03• All abstracts get three independent reviews• Invited vs. encouraged papers – what’s the difference?

– The only truly invited papers are the Keynote addresses and the SDM Lecture

– All other papers will go through the standard review process

• Swapping abstracts with other TC’s or Forums as appropriate is encouraged (inform the Technical Chair!)

Program Schedule

Program Schedule

Dates 19-22 April 2004Location Wyndham Palm Springs Hotel

Palm Springs, California

Colocated Activities 45th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

12th AIAA/ASME/AHS Adaptive Structures Conference6th AIAA Non-Deterministic Approaches Forum5th Gossamer Structures Forum

Session Allocations TC/Forum Sessions PapersStructures 22 135Structural Dynamics 21 129Materials 8 49MDO 8 49Design Engineering 2 13Survivability 2 13ASC 9 54NDA 6 37GSF 10 52Total 88 541

Sessions Available Day AM PMMonday 13 13Tuesday 13 13Wednesday 13 13Thursday 10

TENTATIVE

Preliminary Session LayoutTC/Forum Sessions Mon AM Mon PM Tue AM Tue PM Wed AM Wed PM Thu AM TotalStructures 3 3 4 3 3 3 3 22Structural Dynamics 3 3 3 3 3 3 3 21Materials 1 1 1 1 1 2 1 8MDO 1 1 2 1 1 1 1 8Design Engineering 1 1 2Survivability 1 1 2Adaptive Structures 2 2 3 2 9Gossamer Spacecraft 2 2 2 2 2 10Non-Deterministic Approaches 1 1 1 1 1 1 6Total Sessions 13 13 13 13 13 13 10 88

TC/Forum Papers Mon AM Mon PM Tue AM Tue PM Wed AM Wed PM Thu AM Total AcceptStructures 18 21 24 18 18 18 18 135 88%Structural Dynamics 18 21 18 18 18 18 18 129 85%Materials 6 7 6 6 6 12 6 49 83%MDO 6 7 12 6 6 6 6 49 83%Design Engineering 6 7 0 0 0 0 0 13 81%Survivability 6 7 0 0 0 0 0 13 76%Adaptive Structures 0 0 0 12 12 18 12 54 87%Gossamer Spacecraft 12 14 12 12 12 0 0 62 89%Non-Deterministic Approaches 6 7 6 6 6 6 0 37 88%Total Papers 78 91 78 78 78 78 60 541 86%

Latest Planning Schedule

• September 12: Abstract reviews completed

• September 26: Session planning completed!!! (SDM Planning Meeting in Palm Springs on this day)

• October 10: Session chairs & co-chairs assigned

• October 24: Program completed!!!

Structures Review Statistics

• Abstracts Processed– 150 Total Structures Abstracts Submitted– 0 Accepted (too early to accept/reject)– 0 Rejected (too early to accept/reject)– 34 Returned for Revision– 449 Reviews Assigned– 162 Completed Reviews– 37% Total Reviews Completed

• 6 Student Abstracts Placed In Structures Sessions• 5 Special Sessions in Structures Program

Structures Area Abstracts – SDM 45

Review Process• Review Team

– 36 TC Member Reviewers – Average 5 abstracts (will increase)– 33 Friends of TC Reviewers – Average 5 abstracts– 33 Volunteer Reviewers – Average 3 abstracts

• 1st Abstract Deadline 8/1/03 - around 90 abstracts submitted

• 2nd Abstract Deadline 8/15/03 – Shot up to 150 abstracts• Conducted initial screening and sent 34 abstracts back

for revision– 19 were revised– 15 were not revised; (will be rejected)– If reject 5 more, would give an acceptance rate of 87%

• 430 Now under review• We are short on reviewers, as I expect some reviewers

not to perform; expect to assign these to other reviewers

Special Sessions

Special Session on Aircraft Structures Certification

• Organized and Chaired by Steve Engelstad and Ben Thacker

• 5 papers followed by a panel discussion

1. A Hybrid Probabilistic Method for Composite Aircraft Design2. Evolution of Structures Design Philosophy and Criteria3. Probabilistic Damage Tolerance Methodology for Reliability

Design and Inspection Optimization4. A Functional Methodology for Assessing Post-Initation

Damage in Composite Structures and Bonded Joints5. An Alternate Certification Approach for Composite

Structures

Special Session on Structural Health Management

• Organized and Chaired by Aditi Chattopadhyay and Michael Enright

1. Damage detection capabilities based on new signal processing approach

2. A Probabilistic Damage-Based Approach to Structural Health Management

3. Monitoring Preload in a Composite-to-Metal Bolted Joint with Fiber Optics

4. Finite Element Modeling for Piezoelectric Smart Composites Including Debonding

5. An Integrated Active Sensing System for Damage Identification and Prognosis

6. Optimal Sensor Placement for Damage Characterization Using Genetic Algorithms

7. Bio-Inspired Embedded Sensory Architecture for Structural Health Monitoring

Special Session on High Energy Impact Considerations

• Organized and Chaired by Anthony N. Palazotto

1. High Velocity Impacts of Man Portable Air Defense Systems (MANPADS) on Selected Targets

2. Testing Composite Joints Under High Energy Hydrodynamic Ram Conditions

3. A Gradient-Dependent Constitutive Model to Simulate Impact Damage Problem

4. Phase Transitions and Dislocation-Based Plasticity at High-Strain-Rates in Solids

5. Fragment Cloud Impact Response of Woven Carbon Epoxy Composite Plates

6. Numerical Analysis for a Study of the Mitigation of Hypervelocity Gouging

7. Finite Element Simulation of Soft Projectile Impacting Braided Composite Structures

Special Session on Concepts for Morphing and Reconfigurable Structures

• Organized and Chaired by Sergio Pellegrino

1. Continuous Moldline Technology Flight Demonstration Program

2. Actuation of kagome lattice structures 3. Bi-stable Concepts for Reconfigurable

Structures4. An Asymmetrically-Bistable Monolithic Energy

Storing Structure5. A novel actuated composite tape-spring6. Multi-Configuration Space Frames

Special Session on Cryogenic Propellant Tanks and Integrated Structures for a

Next Generation Reusable Launch Vehicle

• Organized and Chaired by Ted Johnson

1. Composite Development and Applications for RLV Tankage2. Measuring Thermal Conductivity at LH2 Temperatures3. Shortened Qualification Testing Time for Propellant Tanks Of a Reusable

Launch Vehicle 4. Thermal–Structural Optimization of Integrated Cryogenic Propellant Tank

Concepts for a Reusable Launch Vehicle 5. Trade Study Results for a Reusable Launch Vehicle Composite

Hydrogen Tank 6. Prediction of Micro-crack Densities in Cryogenic IM7/977-2 Propellant

Tanks 7. Thermal-Mechanical Failure Analysis of Composite Cryogenic Materials

Using Multi-Continuum Theory 8. Reliability and Sizing of Propellant Tanks Of a Reusable Launch Vehicle9. Analysis of TPS Sandwich Panel with Foam Core 10. Polyimide Foam Development and Characterization for Lightweight

Integrated Structures

Technical Sessions

Technical Session Roster -- Structures

1. Beams, Plates and Shells I (7)

2. Structural Applications I (5)

3. Structural Mechanics I (7)

4. Design Tradeoffs and Optimization (5)

5. High Energy Impact Considerations (7)**

6. Aircraft Structures Certification (5 and panel) **

** Denotes Special Session or Panel Session

(#) = Number of Abstracts in Topic

Monday April 19 (6 session max; 7 last year)

Tuesday April 20 (7 session max; 6 last year)

1. High Fidelity Analysis for Failure Initiation and Damage (7)

2. Computational Structural Mechanics I (6)

3. Morphing and Reconfigurable Structures (6)**

4. Structural Health Management (7)**

5. Structural Stability and Postbuckling Behavior (5)

Tuesday April 20 Continued (7 session max; 6 last year)

6. Damage Detection and Evaluation I (7)

7. Cryogenic Fuel Tank Structures I** (5)

Technical Session Roster – Structures (Continued)

Wednesday April 21 (6 session max; 4 last year)

1. High Fidelity Analysis for Stability Critical Structures (6)

2. Structural Integrity (7)

3. Propulsion and Rotorcraft Structures (7)

4. Damage Detection and Evaluation II (6)

5. Cryogenic Fuel Tank Structures II** (5)

6. Structural Applications II (7)

** Denotes Special Session or Panel Session

(#) = Number of Abstracts in Topic

Technical Session Roster – Structures (Continued)

** Denotes Special Session or Panel Session

(#) = Number of Abstracts in Topic

Thursday April 22 (3 session max; 6 last year)

1. Beams, Plates and Shells II (6)

2. Computational Structural Mechanics II (5)

3. Structural Mechanics II (7)

End of Presentation

Alternate Abstract Review Process

Based on Materials TC Approach

• Distribute Submitted Abstracts to Small TC Review Team– Assess Technical Credibility– Identify Clearly Deficient Abstracts– Return Deficient Abstracts for Revision With Due Date

• Accept Abstracts That Pass Initial Review• Reject Deficient Abstracts If Not Revised• Reject Deficient Abstracts Not Revised Satisfactorily

NOTE• This Approach Is Fair

– Allows for Revisions to Occur– Ensures That Authors Who Make An Honest Effort Get

Chance to Present• This Approach Is More Consistent With the High Acceptance

Rates for Abstracts