期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 43, 期 10, 页码 1791-1799出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2012.05.006
关键词
Polymer-matrix composites (PMCs); Discontinuous reinforcement; Strength; Fracture mode analysis
资金
- New Energy and Industrial Technology Development Organization (NEDO) [P08024]
This study proposes the layer-wise method (LWM) as a new approach for predicting the tensile strength of discontinuous fiber-reinforced composites that have arbitrary fiber orientation angles. The LWM assumes the discontinuous fiber-reinforced composites are identical to laminates that are composed of unidirectional fiber-reinforced plies and have the same distribution of fiber angles over the entire laminate. We applied the LWM to discontinuous carbon fiber polypropylene composites and evaluated the effect of fiber length on tensile strength and fracture mode. Simulated results agreed well with those of experiments. In addition, we proposed a simple analytical model based on micromechanics. This analytical model can correctly evaluate the strength and the fracture mode as effectively as the LWM. We also compared these models with a rule of mixture considering the failure criterion of fiber breakage and examined the limitation of the rule of mixture in predicting composite strength. (C) 2012 Elsevier Ltd. All rights reserved.
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