含孔金属网/纤维增强层板拉伸性能和失效模式研究  

On the Tensile Response and Damage Mechanism of Metal Mesh/Fiber-Reinforced Laminates with Pores

作　　者：陈泰聪 盛冬发 虎积元 李子恒 俞红全 CHEN Taicong;SHENG Dongfa;HU Jiyuan;LI Ziheng;YU Hongquan(Civil Engineering Institute,Southwest Forestry University,Kunming 650224,Yunnan,China)

机构地区：[1]西南林业大学土木工程学院,云南昆明650224

出　　处：《力学季刊》2025年第1期76-86,共11页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金(11862023)。

摘　　要：通过对304不锈钢丝网/碳纤维混杂复合材料(Stainless Steel Wire Mesh/Carbon Fiber Reinforced Polymer,SSWM/CFRP)层板的拉伸试验和数值仿真模拟,探究了不同孔径单孔试件和不同圆孔排布双孔试件的剩余强度和失效模式,采用数字图像相关(Digital Image Correlation,DIC)技术和扫描电子显微镜(Scanning Electron Microscopy,SEM)来观察试件的变形和损伤演化特征.结果表明:含孔SSWM/CFRP层板的拉伸应力-应变曲线总体呈现出脆性破坏的特点,其中单孔试件的剩余强度随孔径的增大而减小,双孔试件的有效横截面积受到试件圆孔排布的影响.DIC技术捕获单孔试件局部的最大拉伸和剪切应变值分别出现在圆孔左右和斜对角线位置.构建的有限元模型可以有效预测试件的剩余强度和断裂路径,并揭示了试件的主要失效模式为SSWM的延性断裂、0°纤维层的纤维拉伸损伤、90°纤维层的基体拉伸损伤以及层间分层损伤.By conducting tensile tests and numerical simulations on 304 stainless steel wire mesh/carbon fiber hybrid composite(SSWM/CFRP)laminates,the residual strength and failure modes of single hole specimens with different aperture sizes and double hole specimens with different circular hole arrangements were investigated.Digital Image Correlation(DIC)technology and Scanning Electron Microscopy(SEM)were used to observe the deformation and damage evolution characteristics of the specimens.The results indicate that the tensile stress-strain curve of SSWM/CFRP laminates with holes generally exhibits brittle failure characteristics.The residual strength of single hole specimens decreases with the increase of hole diameter,while the effective cross-sectional area of double hole specimens is affected by the arrangement of circular holes in the specimens.The DIC technology captures the maximum tensile and shear strains of a single hole specimen locally,which appear on the left and right sides of the circular hole along the diagonal direction.The constructed finite element model can effectively predict the residual strength and fracture path of the specimen,and reveal that the main failure modes of the specimen are ductile fracture of SSWM,fiber tensile damage of 0°fiber layer,matrix tensile damage of 90°fiber layer,and interlayer delamination damage.

关 键 词：纤维增强金属层板 失效准则 数值模拟 剩余强度 损伤机制和演化过程 

分 类 号：TB333[一般工业技术—材料科学与工程]