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Effect of Fiber Shape on Defect Sensitivity of Fiber Kinking for Pultruded Carbon Fiber Composites


Title: Effect of Fiber Shape on Defect Sensitivity of Fiber Kinking for Pultruded Carbon Fiber Composites

Authors: Ryan J. Clarke, David A. Miller, Douglas S. Cairns

DOI: 10.33599/nasampe/s.21.0596

Abstract: The tensile strength of FRPC’s tend to be much higher than their compressive strength because FRPC’s fail in fiber kinking instead of fiber rupture like they do in tension. Current research activities are looking at novel precursors for reducing overall costs of carbon fiber production. The potential cost savings in new precursor carbon fiber make it economically feasible to use in large structural components. Some fiber precursors and manufacturing methods produce carbon fibers that have a kidney-shaped cross-section whereas traditional carbon fiber is circular. The aim of this study is to investigate the differences in defect sensitivity between fiber shapes in compressive failures of carbon fiber composites via fiber kinking. Two micromechanical models were developed in ABAQUS of single carbon fibers, one circular the other kidney-shaped, embedded in a matrix with periodic boundary conditions. Fiber misalignment was added into the models at varying degrees of misalignment to test defect sensitivity and non-linear buckling analysis was used to initiate fiber kinking.

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Conference: SAMPE NEXUS 2021

Publication Date: 2021/06/29

SKU: TP21-0000000596

Pages: 12

Price: FREE

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