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- 2017
复合材料层合板静态压痕与损伤行为
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Abstract:
发展了层合复合材料面内及分层失效模型，模型考虑了横向压剪残余剪切变形和分层残余相对位移。提出一种块体单元包含若干铺层的模型，以减少复合材料逐层分析时的计算量。对一种碳纤/环氧层合复合材料进行了横向压痕试验，测量了不同压力下凹坑的深度，用超声C扫测得损伤面积。用发展的模型在ABAQUS平台上通过用户材料子程序UMAT模拟了上述试验，分析了试验曲线特征点对应的损伤机制，通过与试验结果的对比，验证了本文模型的合理性。 Criteria for intralaminar and delamination failures of composite laminate were developed in which transverse residual shear deformation and interfacial residual opening were modeled. A brick finite element including multiple-plies was suggested in order to decrease computing costs in ply-by-ply damage analysis of composites. Quasi-static indentation tests were conducted to a carbon fiber/epoxy matrix composite laminate. The indent depth under different contact force was measured and damage areas were obtained by C-scan. The experiments were simulated by the proposed models in the Abaqus by user-defined material subroutine (UMAT). The damage modes corresponding to the characteristic points on tested force-displacement curves were identified via numerical simulations. The proposed models are validated by experimental measurements. 国家自然科学基金（11272147；10772078）；航空科学基金（2013ZF52074）；机械结构力学及控制国家重点实验室基金（0214G02）；国家重点实验室开放基金（IZD13001-1353；IZD150021556）；江苏省高校优势学科建设工程项目
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