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Workshop on Multiscale Modeling of Composites

Ohio Aerospace InstituteJuly 23 – 24, 2009

Organizers: Brett Bednarcyk, Steve Arnold, Rob GoldbergNASA Glenn Research Center

Steve ClayAir Force Research Laboratory

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Purpose and Goals of Workshop

1. Increase the awareness among the participants of each other’s work on multiscale modeling and discuss how it fits together

2. Promote synergy in the work being done through NASA and AFRL funding

3. Identify key challenges to be addressed in the near future along with collaborative opportunities

4. Establish an interactive multiscale composite modeling wiki website to enable dissemination of information and promote future collaboration

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Format of Presentations• Presenters are allotted 20 min. for presentations• 10 minutes reserved for questions/discussion

– Please hold questions/comments until end of presentation– Need to stay on schedule– Want to allow speaker to finish presentation

• We will let presenter know at 18 min.• All presentations will end after 20 min.• 10 min. discussion can continue during scheduled

periods

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AgendaThursday, July 23 8:00 Welcome Bednarcyk/Arnold/Clay/Goldberg 8:30 Overview of NASA’s Integrated Multiscale

Micromechanics Analysis Code (ImMAC) Bednarcyk (NASA GRC)

9:00 AFRL Multiscale Modeling Overview Clay (AFRL) 9:30 Overview of Multicontinuum Theory and

Application to Progressive Failure of Large Composite Structures

Robbins (Firehole, Inc)

10:00 Break 10:15 Multiscale Modeling in HyperSizer Structural

Sizing Software Yarrington (Collier Research Corp.)

10:45 A Synergistic Multiscale Modeling Approach to Damage in Composites

Talreja (Texas A&M)

11:15 Discussion Lead – Steve Arnold 11:45 Lunch – Catered on site Lunchtime presentation: Beale (Auburn U.) - Methods of

Manufacturing and Variations in Braided Structures and Fiber-Reinforced Composites

12:45 Effective Inelastic Response of Polymer Composites by Direct Numerical Simulations

Benzerga (Texas A&M)

1:15 Meso-mechanical modeling of tri-axial braided composites

Binienda (U. Akron)

1:45 Detailed Morphology Modeling and Residual Stress Evaluation in Tri-axial Braided Composites

Mollenhauer (AFRL)

2:15 Macromechanical Modeling of a Triaxial Braided Composite

Blinzler (U. Akron)

2:45 Break 3:00 Multiscale Modeling of Triaxially Braided

Polymer Matrix Composites Liu (Arizona St.)

3:30 Multiscale Modeling of Melt-Infiltrated SiC/SiC Composites

Mital (NASA GRC/U. Toledo)

4:00 Discussion Lead – Rob Goldberg 4:30 Optimization of a composite scarf repair

patch under tensile Loading Breitzman (AFRL)

5:00 Macroscopic Joint Finite Element Stapleton (U. Michigan) 5:30 Discussion Lead – Steve Clay 6:00 Dinner/Activity (OAI Sun Room)

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AgendaFriday, July 24 8:00 Multiscale Progressive Failure Analysis of

Titanium Matrix Composites Hutchins (Mississippi St.)

8:30 Multiscale Model for Progressive Damage and Failure of Laminated Composites Using an Explicit Finite Element Method

Pineda (U. Michigan)

9:00 An Explicit Multiscale Model for Progressive Failure of Impact Damage on Composite Structures

Moncada (Arizona St.)

9:30 Eigendeformation-based computational homogenization for failure modeling of composite materials

Oskay (Vanderbilt U.)

10:00 Discussion Lead – Tom Lacy 10:30 Break 10:45 Modeling Progressive Damage in Composites via

Continuum Displacement Discontinuities Ranatunga (Miami U.)

11:15 In-plane fracture analysis of laminated fiber reinforced composites using the variational multiscale cohesive method

Rudraraju (U. Michigan)

11:45 Discrete Modeling of Arbitrary Matrix Cracking and Delaminations in Laminated Composites

Iarve (UDRI)

12:15 Discussion Lead – David Stargel 12:45 Summary/Way Forward 1:00 Adjourn

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Thurs. Dinner Activity

• Cornhole tournament

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1st Annual Multiscale Modeling of Composites

Cornhole Tournament

CHAMPION

RUNNER-UP

Talreja/Liu

Clay/ Ranatunga

Moncada/Mullings Crouch/Mollenhauer

Beale/Arnold

Oskay/Rudraraju

Gustafson/BenzergaBednarcyk/Thesken

Binienda/Breitzman

Stapelton/Mital

Branscomb/Lacy

Hutchins/Robbins

Goldberg/Iarve

Pineda/Yarrington

Haney/Piscak

BYE

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Participants• Steve Arnold (NASA GRC)• David Beale (Auburn U.)• Brett Bednarcyk (NASA GRC)• Amine Benzerga (Texas A&M)• Wieslaw Binienda (U. Akron)• Brina Blinzler (U. Akron)• Tim Breitzman (AFRL)• Steve Clay (AFRL)• Robert Crouch (Vanderbilt U.)• Robert Goldberg (NASA GRC)• Pete Gustafson (Western Michigan U.)• Mark Haney (AFRL)• John Hutchins (Mississippi St.)• Endel Iarve (UDRI)• Lee Kohlman (U. Akron)• Tom Lacy (Mississippi St.)• KC Liu (Arizona St.)• James Min (NASA GRC)• Subodh Mital (U. Toledo)

• David Mollenhauer (AFRL)• Albert Moncada (Arizona St.)• Justin Mullings (U. Wyoming/Firehole Technologies)• Pappu Murthy (NASA GRC)• Caglar Oskay (Vanderbilt U.)• Evan Pineda (U. Michigan)• Vipul Ranatunga (Miami U.)• Don Robbins (Firehole Technologies)• Gary Roberts (NASA GRC)• Siva Rudraraju (U. Michigan)• Scott Stapleton (U. Michigan)• David Stargel (AFRL)• Ramesh Talreja (Texas A&M)• Alex Tessler (NASA LaRC)• John Thesken (NASA GRC)• Anthony Waas (U. Michigan)• Phil Yarrington (Collier Research Corp.)• David Branscomb (Auburn U.)

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Multiscale Modeling of Composites Interactive Wiki

• http://wiki.nasa.gov• http://wiki.nasa.gov/cm/wiki/Multiscale%20Modeling%20of

%20Composites.wiki/home/home.html• Support: nasa-support@etouch.net

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What is a Wiki?• A collection of web pages that anyone can easily edit and

add content• Ward Cunningham is credited for creating the first Wiki

engine in 1995, named after the Wiki transport buses in Hawaii

• His vision: Create the simplest online database that would work

Since then:• The internet has transformed from a digital newspaper to

a digital canvas where users create, share, and interact• In 2006, the dynamic web surpassed the static web• Wikis play a dominant role in the internet’s current state

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Wikipedia - The Poster Child of the Wiki World

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Wikipedia - The Poster Child of the Wiki World

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Wikipedia - The Poster Child of the Wiki World

National Aeronautics and Space Administration

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The Wiki Concept has a Broad Range of Usage

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Anyone at NASA can set up their own Wiki by going to http://wiki.nasa.gov

NASA Wikis

NASA Wikis use SamePage software, from eTouch systems (www.etouch.net)

eTouch systems manages NASA’s public web portal and internal Wiki project

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Multiscale Modeling of Composites Collaboration Project Wiki

• Enable dissemination of information and collaboration on multiscale modeling of composites – establish a community– Ask questions of the community– Distribute software, software updates, publications– Inform community on members’ current work

• NASA – Air Force – Industry – Academia membership• Access to site open to invited members only• Members have full and open access to evolving the site• Version tracking – all edits remain account for

– Can easily role back to previous versions– Discourages vandalism

• Each member has personal page• New Content: Copies of all presentations from workshop