Adaptive Multi-Scale & Multi-Fidelity Progressive Failure Analysis of Composites

14 Nov 2022

Although high-fidelity modeling of progressive damage has advanced our understanding of failure mechanisms in fibre-reinforced composites, such techniques are currently still too computationally intensive for direct application to composite structures. The multi-scale nature of damage in...

Practical Developments in Multiscale Modeling of Composites

07 Apr 2021

Validated models (be they data driven or physics based) can accelerate the design, certification, and ultimate deployment of novel materials and structures by allowing rapid iteration and virtual experimentation while at the same time minimizing the need for expensive and time consuming physical...

MSC.Patran/Nastran-SwiftComp GUI

01 Apr 2019

A graphical user interface (GUI) has been developed to integrate SwiftComp into MSC.Patran/Nastran for constitutive modeling and providing the automated conversion of the MSG plate and beam stiffness matrix into MSC.Nastran shell and beam element properties and materials. In order to reduce...

Composite Stiffness Property Prediction

07 Aug 2017

Micromechanical models for the composite axial tensile, transverse tensile, and axial shear are combined into one tool with the objective of comparing their effectiveness as property prediction methods.  Rule of mixtures models (ROM) and the composite cylinder model (CCM) results for...

Woven fabrics UMAT- a coupled material model

02 Aug 2017 | Contributor(s): Ali Roumani

One of the advantages of woven fabrics over unidirectional prepregs is their superior formability thanks to the large shear deformation capability. There exists, however, a limit on the shear deformation of woven fabrics, namely the wrinkling. Applying tension to delay wrinkling during forming...

Finite element unit cell model based on ABAQUS for fiber reinforced composites

26 Jul 2017

Micromechanical investigations of polymer matrix composites with shape memory alloy reinforcement

18 Jul 2017

Numerical characterization of effective fully coupled thermo-electro-magneto-viscoelastic-plastic response of smart composites

18 Jul 2017

Computational evaluation of effective stress relaxation behavior of polymer composites

11 Jul 2017

This paper presents a micromechanics model to characterize the effective stress relaxationstiffness of polymer composites. The linear viscoelastic behavior of polymer material wasmodeled by hereditary integral. The proposed model was established based on thevariational asymptotic method for unit...

MUL2-UC Beam modeling of periodically heterogeneous composites

13 Jun 2017

The micromechanics code MUL2-UC is developed to work as an efficient and high-fidelity tool for the computation of the effective stiffness matrix and the recovering of the local fields of periodically heterogeneous composite structures. The main novelty is that higher-order beam theories are...

Orthotropic Stress Concentration Factor

25 Sep 2014 | Tools

Calculates the stress concentration factor for a circular hole in an infinite orthotropic plate

Demystifying Composites Simulation for Performance

16 Nov 2024 | Downloads | Contributor(s): Ali Roumani

The presentation given in IACMI Tutorial session before the 2016 Summer Members Meeting. It tried to explain in layman terms modeling and simulation, and composites, pointed out the barriers we need to overcome to reap full benefits of simulation for composites innovation. 

Mechanics of Structure Genome:Fill the Gap between Materials Genome and Structural Analysis

10 Oct 2013 | Downloads

This is the presentation given as a Purdue Solid Mechanics Seminar on 5/18/2016. It summarizes the most recent devleopments up to the time of presentation. 

A Unified Theory for Constitutive Modeling of Composites

14 Aug 2014 | Publications

A unified theory for multiscale constitutive modeling of composites is developed using the concept of structure genomes. Generalized from the concept of the representative volume element, a structure genome is defined as the smallest mathematical building block of a structure. Structure...

2015 cdmHUB Workshop

10 Oct 2013 | Series

Composites Design, Analysis and Manufacturing Workshop held at Purdue University on November 3-5, 2015.  Both lectures slides and lecture videos are presented.

2015 cdmHUB Workshop

16 Nov 2024 | Series | Contributor(s): Ali Roumani

Composites Design, Analysis and Manufacturing Workshop held at Purdue University on November 3-5, 2015.  Both lectures slides and lecture videos are presented.

Presentation of Micromechanics Simulation Challenge Level I Initial Results

10 Oct 2013 | Downloads

The attached slides summarize the Micromechanics Simulation Challenge Level I Initial Results in a presentation format. The complete report can be found at https://cdmhub.org/resources/948, and all the files supporting the results can be found...

Skill of Using Surface Element in ANSYS

10 Oct 2013 | Downloads

Dear All, For those ANSYS users, please check the attached skill of using surface element, “Surface_Effect_Elements.pdf”, to apply the surface tangent traction. It works well for homogenization simulations, and also for some beams structure validations. This attached zip file also...

CATIA Composites Braiding

16 Nov 2024 | Animations | Contributor(s): Ali Roumani

A tool developed with BMW for strong structural Composites parts. Composites braiding is for high output cylindrical parts with minimal waste.

Structure Genome: Fill the Gap between Materials Genome and Structural Analysis

10 Oct 2013 | Publications

A new concept, Structure Genome (SG), is proposed to fill the gap between materials genome and structural analysis. SG acts as the basic building block of the structure connecting materials to structures and the mechanics of SG governs the necessary information to link materials genome and...