Showing posts with label Composite Material Modeling. Show all posts
Showing posts with label Composite Material Modeling. Show all posts

Tuesday, February 25, 2014

GENOA by AlphaSTAR Webinar 2014 Series A Composite Software Solution

Overview
AlphaSTAR and the Altair Partner Alliance have teamed up to offer a monthly webinar focusing on various topics involving the GENOA and MCQ software solution suite.

Check back regularly as new topics and sessions are scheduled!



Session Descriptions

Title: Tension after Impact: Damage Progression Coupling Different Structural FE Solvers in Sequence
Date: February 13th 2014
Watch the recording

Abstract
Join the webinar on February 13th 2014 for a discussion on how GENOA can be used to couple different analysis types together using different FE solvers so that advanced structures can be analyzed and assessed for damage initiation and propagation, fracture initiation and propagation using the engineering technology of choice.

Knowledge of the residual strength of a composite after a possible damage event is important. It allows the engineer to asses many ‘what-if’ situations in order to make a robust design.

Using GENOA, damage, residual stresses, and deformed/fractured meshes from one type of analysis type and solver can easily be used as the starting point for a completely different analysis and solver. This allows the residual strength of a structure to be computed based on a customized user defined life cycle for a structure all with users choice of technology.
An example will be shown that simulates impact with LS Dyna and then tension after impact using OptiStruct. Damage and residual stresses after impact and used to begin the tension after impact analysis.

We will also show our MULTI-SCALE methods carrying FE results down to the micro scale level so that the root damage mechanisms are assessed and the resulting degradation is accurately represented for every finite element and for every load step in the analysis.


Title: Effect of Voids, Defect Shapes and Sizes, and Fiber Waviness on Fatigue Life
Date: March 13th 2014
Time: 11 am EST
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Abstract
Join the webinar on March 13th 2014 for a discussion on how GENOA and MCQ can be used to determine the effect of voids, defect shapes and sizes, and fiber waviness on fatigue life. Using this methodology advanced structures can be analyzed and assessed for damage initiation and propagation, fracture initiation and propagation.

Knowledge of the life of a composite structure with defects is important since it reflects the “as-is” condition. It allows the engineer to assess many types of internal defects, their distribution, shapes, and size, in order to make decisions and produce a robust design.
An example will be shown that simulates these effects on an open hole tension coupon undergoing quasi static fatigue as well as random fatigue.

We show our MULTI-SCALE methods carrying FE results down to the micro scale level so that the root damage mechanisms are assessed and the resulting degradation is accurately represented for every finite element and for every load step in the analysis.


Title: 1D, 2D, and 3D, Unidirectional, Weave, and Braid Modeling and Reverse Engineering Constituent Properties for Use in Multi Scale Progressive Failure Analysis
Date: April 10th 2014
Time: 11 am EST
Register Now

Abstract
Join the webinar on April 10th 2014 for a discussion on how GENOA and MCQ can be used to determine the constituent properties – fiber, matrix, and stress strain curves for unidirectional composites. We will also discuss how to model weaves and braids. These 1D, 2D, 2.5D and 3D architectures can be used in FE solvers to assess for damage initiation and propagation, fracture initiation and propagation.

Material, damage, and fracture modeling is a very important step in finite elements. We will begin by discussing the material modeling for complex architecture and the damage and fracture criteria used to model progressive failure analysis.

An example will be shown that models 1D, 2D, and 3D architecture for a simple coupon and then uses that to perform a progressive failure analysis of an automotive vehicle component.

We show our MULTI-SCALE methods carrying FE results down to the micro scale level so that the root damage mechanisms are assessed and the resulting degradation is accurately represented for every finite element and for every load step in the analysis.

Thursday, October 4, 2007

Composite Material Modeling


Software Suite for Durability, Damage Tolerance, and Life Prediction
Augments FEA Solvers MSC Nastran*, ABAQUS, ANSYS & LS-DYNA

* Best Performance and Verified Solutions with MSC Nastran



This Week's Feature Composite Example

Composite Material Modeling with GENOA

Figure 1 - Example of Composite Configurations in GENOA Material Modeling
GENOA utilizes a composite micromechanics scheme to compute the mechanical and physical properties of a composite with 1-D, 2-D or 3-D fiber architecture (Figure 1). An illustration of the composite modeling procedure is shown in Figure 2 where stiffness and strength as well as physical properties of each type of reinforcement (e.g. filler, warp and/or through-thickness fiber) are separated into material directions based on fiber angles and contents. These are then combined with matrix properties and/or void contents to create composite unit cell properties. The modeled composite properties include 1) stiffness, 2) Poisson's ratios, 3) strengths, 4) coefficients of thermal expansion, 5) coefficients of hygral expansion, 6) heat conductivities, and 7) moisture diffusivities.
Figure 2 - GENOA's Micromechanics Modeling Procedure for Composites
This composite modeling technique is embedded in the GENOA structural Progressive Failure Analysis (GENOA-PFA) to evaluate both micro failure in the composite unit cell and the overall structural performance. A stand-alone composite property analyzer titled MCA is also presented in the GENOA software suite.

Figure 3 - Modeling the Three Composite Systems in the Army Combat Bridge Design Using the GENOA Composite Micromechanics Technique
GENOA predicted mechanical properties of three polymeric composite systems (a. tri-axial fabric, b. five harness satin weave and c. uni-axial tape carbon fiber reinforced EPON) used in the Army mobile combat bridge design [1, 2] are presented in Figure 3. The simulation results were verified with the Army's test data, which also established A-B base allowable using GENOA's probabilistic module.

Click here to receive demo and presentation of Composite Material Modeling.


References:
1. Ayman Mosallam, Frank Abdi, and Xiaofeng Su, "Virtual Testing And Progressive Failure Analysis Of ARMY COMPOSITE BRIDGE". SAMPE 2004, Long Beach, CA 2004.Click here to read technical publication.

2. Frank Abdi, Zhongyan Qian, Ayman Mosallam, Ramki Iyer, Jian-Juei Wang, Trent Logan, "Composite army bridges under fatigue cyclic loading". Journal of Society of Infrastructure Engineering (SIE), Taylor and Francis Publications, Vol 2, No 1. March, 2006, 63-73. Click here to read technical publication. 
 

Did You Know?

Damage Progression throughout Finite Element Model

imageUnlike many Finite Element Solvers, GENOA accounts for damage progression throughout the model while simultaneously allowing the use of Virtual Crack Closure Technique (VCCT) and Discrete Cohesive Zone Modeling (DCZM) fracture analysis. This feature was recently demonstrated and verified with test data for a bonded three stringer panel.  For more information on this feature and trying out GENOA through our demos, please contact our sales at sales@ascgenoa.com.
This issue was brought to you by Alpha STAR Corporation.

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