Abstract
The present work shows on the one hand the influence of symmetrical and random fiber distributions on the numerical determination of the effective homogenized material parameters of the unidirectional layer. On the other hand, the stress paths of symmetric and arbitrary RVE systems are analyzed and evaluated. In a fatigue-relevant consideration, the developed RVE systems map the damaging force paths between fiber and matrix. This numerical calculation of the stress on the matrix material is intended to simplify the fatigue strength assessment workflow of CFRP structures. The goal is to replace the currently required orthotropic Wöhler curves with a Wöhler curve for the matrix material. In investigations on pure resin samples it could be shown that the strength of these pure resin samples, corresponded to the matrix range of the numerical simulations of the RVE systems.
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