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Multi-scale simulation of viscoelastic fiber-reinforced composites

: Staub, S.; Andrä, H.; Kabel, M.; Zangmeister, T.

Fulltext (PDF; )

Technische Mechanik 32 (2012), No.1, pp.70-83
ISSN: 0232-3869 (Print)
ISSN: 2199-9244 (Online)
Journal Article, Electronic Publication
Fraunhofer ITWM ()

This paper presents an effective algorithm to simulate the anisotropic viscoelastic wbehavior of a fiber-reinforced composite including the influence of the local geometric properties, like fiber-orientation and volume fraction. The considered composites consist of a viscoelastic matrix which is reinforced by elastic fibers. The viscoelastic composite behavior results anisotropic due to the local anisotropic fiber-orientations. The influence of the local time-dependent viscoelastic properties are captured within two elastic microscopic calculations for each fiberorientation in the composite part. These calculations can be performed within a preprocessing step, and thus no expensive, time-dependent viscoelastic multi-scale simulation has to be carried out to incorporate the local properties. The advantage of the presented approach is that the locally varying microscopic properties can be captured in a one-scale simulation within a commercial finite element tool like ABAQUS.