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Numerical simulation and experimental verification of hollow and foam-filled flax-fabric-reinforced epoxy tubular energy absorbers subjected to crashing

 
: Sliseris, J.; Yan, L.; Kasal, B.

:

Mechanics of composite materials = Mekhanika kompozitnykh materialov 53 (2017), Nr.4, S.487-496
ISSN: 0191-5665 (Print)
ISSN: 1573-8922 (Online)
ISSN: 0032-390X
ISSN: 0203-1272
Englisch
Zeitschriftenaufsatz
Fraunhofer WKI ()
discontinuous reinforcement; polymer-matrix composites (PMCs); finite element analysis (FEA)

Abstract
Numerical methods for simulating hollow and foam-filled flax-fabric-reinforced epoxy tubular energy absorbers subjected to lateral crashing are presented. The crashing characteristics, such as the progressive failure, load–displacement response, absorbed energy, peak load, and failure modes, of the tubes were simulated and calculated numerically. A 3D nonlinear finite-element model that allows for the plasticity of materials using an isotropic hardening model with strain rate dependence and failureis proposed. An explicit finite-element solver is used to address the lateral crashing of the tubes considering large displacements and strains, plasticity, and damage. The experimental nonlinear crashing load vs. displacement data are successfully described by using the finite-element model proposed. The simulated peak loads and absorbed energy of the tubes are also in good agreement with experimental results.

: http://publica.fraunhofer.de/dokumente/N-467378.html