Micromechanical Damage Modeling of Long Fiber Reinforced Composites With the Parametric Method of Cells.

Abstract: Micromechanical damage modeling is presented with the parametric high‐fidelity generalized method of cells for a long fiber reinforced composite. Two models for a planar single fiber repeating unit cell, including damage, are proposed. The first one, implemented with the spatial continuum damage mechanics, is based on the idea that volumetric defects occur in the material phases. The other one, modeled with the interface damage mechanics, is founded on the view that cracks as surface‐like de‐ fects cause the stress degradation. The potential and ability of both approaches to predict damage in first‐order homogenization is shown by comparing the simulation results with each other as well as with test data under uniaxial and biaxial stress loading. (© 2017 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)