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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...
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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...
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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...
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PreVABS
16 Nov 2017
PreVABS is a pre-processing tool for VABS and SwiftComp. This tool is designed to reduce the workload of preparing input files of beam cross sections for VABS and SwiftComp, and to make the process automatic for the design and optimization purpose. Cross sections with general and...
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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...
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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...
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Puck Failure Criteria
31 Jul 2017
Composite materials have been established as competitive materials during the last few decades due to their high strength to l ow weight ratio among other advantages and are widely used in many industries. A recent study has found that the industrial usage of composite failure...
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Finite element unit cell model based on ABAQUS for fiber reinforced composites
26 Jul 2017
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Micromechanical investigations of polymer matrix composites with shape memory alloy reinforcement
18 Jul 2017
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Numerical characterization of effective fully coupled thermo-electro-magneto-viscoelastic-plastic response of smart composites
18 Jul 2017
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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...
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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...
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Demystifying Composites Simulation for Performance
28 Jul 2016 | 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.
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Mechanics of Structure Genome:Fill the Gap between Materials Genome and Structural Analysis
18 May 2016
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.
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A Unified Theory for Constitutive Modeling of Composites
18 Apr 2016
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...
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2015 cdmHUB Workshop
05 Jan 2016 | Series
Composites Design, Analysis and Manufacturing Workshop held at Purdue University on November 3-5, 2015. Both lectures slides and lecture videos are presented.
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2015 cdmHUB Workshop
05 Jan 2016 | 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.
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Presentation of Micromechanics Simulation Challenge Level I Initial Results
04 Aug 2015 | 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...
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Skill of Using Surface Element in ANSYS
26 Mar 2015 | 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...
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CATIA Composites Braiding
09 Mar 2015 | 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.