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Experimental and numerical investigations of the interlaminar shear properties of carbon/carbon composites

机译：碳/碳复合材料层间剪切特性的实验性和数值研究

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Experimental tests and numerical simulations were implemented to investigate the interlaminar shear properties of carbon/carbon composites (C/Cs). A unit-cell model, according to the microstructure of the C/Cs, was used to predict material properties of the C/Cs. A three-dimensional finite element model was established to investigate the damage behavior of C/Cs on the basis of Linde failure criterion and damage evolution. Good agreement, in terms of the load force history and failure modes, was observed between the experimental and numerical results; this provided the applicability of the numerical simulation. The test results show that the interlaminar shear strength of the C/Cs was 10.52 MPa and the value of the simulation result was 10.89 MPa, with the relative error being less than 4%. Damage contours and stress distribution analysis of the simulation results are discussed. Fiber damage occurred at the bottom of the specimen, and matrix damage was found in the upper half of the specimen; this was similar to the appearance of the tested specimens. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44783.
机译：实施了实验试验和数值模拟，以研究碳/碳复合材料（C / CS）的层间剪切性能。根据C / Cs的微观结构，使用单细胞模型来预测C / Cs的材料特性。建立了三维有限元模型，以研究林德故障标准和损伤进化的C / CS的损伤行为。在实验和数值结果之间观察到载重历史和失效模式方面良好的一致性;这提供了数值模拟的适用性。测试结果表明，C / CS的层间剪切强度为10.52MPa，仿真结果的值为10.89MPa，相对误差小于4％。讨论了损伤轮廓和仿真结果的应力分布分析。样品底部发生纤维损伤，并在标本的上半部分发现基质损伤;这类似于测试标本的外观。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2017,134,44783。

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