Implementation of a Mesomechanical Material Model for
IAD Fabrics within LS-DYNA
Author(s)
Hill, Jeremy
Advisor(s)
Braun, Robert D.
Editor(s)
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Abstract
The implementation and evaluation of a high fidelity material model for dry fabrics is the
main objective of this paper. Inflatable Aerodynamic Decelerators (IADs) and other air inflated structures quite often utilize woven fabrics due to their lightweight and high loading
carrying capabilities. Design optimization of these inflated structures relies on a detailed
understanding of the woven fabric mechanics. Woven fabrics are composite orthotropic
materials that respond differently under load from traditional solid mechanics. While low fidelity fabric materials usually assume a continuous medium, a higher fidelity model needs
to account for the reorientation of yarns and weave geometry. An existing mesomechanical
material model within the LS-DYNAĆ
commercial non-linear finite element software
package is utilized. In this paper, experimental stress-strain data for Kevlar 129 samples are
validated against numerical simulations of models with matching geometry and loading
conditions.
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Date
2012-12-14
Extent
Resource Type
Text
Resource Subtype
Masters Project
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