含孔玄武岩纤维增强铝合金层合板拉伸失效行为分析  

Analysis of tensile failure behavior of aluminum alloy laminates reinforced with porous basalt fibers

作　　者：卢宏彬 盛冬发 俞红全 LU Hong-bin;SHENG Dong-fa;YU Hong-quan(School of Civil Engineering,Southwest Forestry University,Kunming 650224,China;Yunnan Forest Disaster Early Warning and Control Laboratory,Kunming 650224,China)

机构地区：[1]西南林业大学土木工程学院,云南昆明650224 [2]云南省森林灾害预警与控制实验室,云南昆明650224

出　　处：《塑性工程学报》2025年第3期245-253,共9页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(11862023)。

摘　　要：为分析层合板的拉伸失效行为,制备了玄武岩纤维增强铝合金层合板,并对含孔层合板进行了拉伸实验。对金属层合板建立了有限元模型,模拟了含孔玄武岩纤维增强铝合金板的失效行为,通过实验和数值模拟结果分析了层合板的失效模式,使用SEM观察层合板断口特征和分析微观失效模式。结果表明,通过对玄武岩纤维层合板金属层表面进行打磨和化学改性处理,金属层和纤维层贴合紧密。玄武岩纤维增强铝合金层合板的损伤区,由“蝴蝶状”逐渐扩展为“沙漏状”。随着层合板圆孔直径增大,相应的剩余强度逐渐降低。利用SEM观察得到层合板为以纤维拔出、纤维层断裂、基体层开裂、金属层韧脆性断裂和层间分层为主的复杂混合失效模式。实验结果与有限元分析结果基本吻合,验证了数值模拟能够在实际工程应用上提供参考。To analyze the tensile failure behavior of laminates,the aluminum alloy laminates reinforced with porous basalt fibers were pre-pared and the laminates with porous were subjected to tensile tests.The finite element model of metal laminates was constructed to simu-late the failure behavior of aluminum alloy laminates reinforced with porous basalt fibers.The failure mode of the laminates was analyzed through test and numerical simulation results,and the SEM was used to observe the fracture characteristics of the laminates and analyze the microscopic failure mode.The results show that by grinding and chemical modification of the surface of the metal layer of basalt fiber laminates,the metal layer and the fiber layer are closely adhered to each other.The damage area of aluminum alloy laminates reinforced with basalt fibers exhibits a gradual expansion from"butterfly-like"to"hourglass-like"morphology.With the increase of holes diameter of laminates,the corresponding residual strength decreases.The complex mixed failure mode of laminates,comprising fiber pullout,fiber layer fracture,matrix layer cracking,metal layer toughness and brittle fracture,and interlayer delamination was observed by SEM.The test results are in good consistent with the finite element analysis results,which proves that the numerical simulation can provide reference for practical engineering applications.

关 键 词：玄武岩纤维铝合金层合板 损伤失效 圆孔直径 剩余强度 

分 类 号：TB333[一般工业技术—材料科学与工程]