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Intraply Fracture in Fiber-Reinforced Composites: A Peridynamic Analysis

FLORIN BOBARU, JAVAD MEHRMASHHADI, ZIGUANG CHEN, SINA NIAZI

Abstract


In fiber reinforced composites (FRCs), microcracks often initiate at the interface between fibers and the matrix, or from pores in the matrix. With an explicit microstructure representation, a peridynamic model can simulate the initiation, growth, and coalescence of intraply microcracks into macrocracks in the transverse loading of a FRC. The size of the simulated sample, in this case, is limited by the computational cost. For lamina-level simulations, we employ a homogenization strategy for the transversely loaded FRC with a peridynamic model, the Intermediately Homogenized Peridynamic (IH-PD) model for two-phase composites. We compare our results with three-point bending experiments from the literature. The results show that the IH-PD model mimics the tortuous crack path observed experimentally, without having to rely on the detailed microstructure. Moreover, the IH-PD results for the load versus crack opening displacement match very well the experimentally measured data.


DOI
10.12783/asc33/26039

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