基于临界剪应变势差的复合材料层间失效参数标定及冲击模型建立  

Calibration of Interlaminar Failure Parameters and Establishment of Impact Models for CFRP Based on Critical Shear Strain Potential Difference

作　　者：宋通 张赛[1] 孟宪明[1] Song Tong;Zhang Sai;Meng Xianming(China Automotive Technology and Research Center Co.,Ltd.,Tianjin 300300)

机构地区：[1]中国汽车技术研究中心有限公司,天津300300

出　　处：《汽车工艺与材料》2024年第10期1-9,共9页Automobile Technology & Material

基　　金：国家重点研发计划政府间国际科技创新合作重点专项(2019YFE0124100)。

摘　　要：提出了一种应用于校准和验证碳纤维增强复合材料(CFRP)层压板分层相关的层间参数标定方法及基于*MAT_58的冲击模型。层间参数标定方面,主要利用短梁剪切试验面外剪应变与正应变云图提取层间失效条件下的临界剪应变势差计算复合材料层间剪切强度。进一步对材料进行10J和200J能量水平的落锤冲击试验和叠层壳及细化网格尺寸模拟,以验证层间参数的有效性和建模实用性。结果表明,P16M2模型分层阈值载荷误差为5.09%,峰值力误差为8.99%,证明了层间参数的有效性,同时根据各模型在仿真精度及计算成本方面表现,增加叠层壳的层数较细化网格尺寸更为有效。This article proposes a method for calibrating and verifying interlayer parameters related to delamination in Carbon Fiber Reinforced Plastic(CFRP)laminates,as well as establishing a failure model based on*MAT_58.In terms of interlayer parameter calibration,the critical shear strain potential difference under interlayer failure is mainly extracted from the out of plane shear strain and normal strain cloud map of the short beam shear experiment to calculate the interlayer shear strength of composite materials.Furthermore,drop hammer impact experiments are conducted on the materials at 10 J and 200 J energy levels,as well as simulations of laminated shells and refined mesh sizes,to verify the effectiveness and modeling practicality of interlayer parameters.The results showed that the P16M2 model had a threshold load error of 5.09%and a peak force error of 8.99%,proving the effectiveness of interlayer parameters.Furthermore,based on the performance of each model in simulation accuracy and computational cost,increasing the number of layers of laminated shells is more effective than refining mesh sizes.

关 键 词：复合材料层压板 分层失效 短梁剪切 落锤冲击 有限元分析 

分 类 号：TH140.7[一般工业技术—材料科学与工程]