基于内聚力模型的钢-铝胶接接头失效分析  

Failure analysis of steel-aluminum adhesive joint based on cohesive zone model

作　　者：石忠华 张敏强[1] 刘浩亮[1] 李智[1] 苏力争 SHI Zhonghua;ZHANG Minqiang;LIU Haoliang;LI Zhi;SU Lizheng

机构地区：[1]西安电子工程研究所,陕西西安710100

出　　处：《现代机械》2024年第3期27-31,共5页Modern Machinery

摘　　要：胶接与铆接、焊接和螺接等机械连接相比,具有应力集中水平较低、疲劳寿命优良、工艺简单、成本低廉等优点,在航空航天和兵器装备等领域发挥重要作用。本文以胶接的钢-铝接头为研究对象,围绕接头脱粘失效机理和演化规律开展研究,建立胶层内聚力模型,描述其失效力学行为,基于瞬态动力学模型对拉伸剪切载荷下的胶层失效扩展过程进行分析,给出接头变形和应力分布规律,创建典型参考点,利用损伤因子SDEG揭示胶层损伤机理和演化过程。研究结果为优化结构设计和复杂胶接结构力学性能分析奠定坚实基础。Adhesive bonding has the advantages such as low stress concentration,excellent fatigue life,simple process,and low cost compared with mechanical connections such as riveting,welding and screwing.It plays an important role in the fields of aerospace and weapon equipment.The bonded steel-aluminum joint was taken as the research object in this paper,and the mechanism and evolution law of joint debonding failure were studied.The cohesive zone model(CZM)was established to describe the failure mechanical behavior of the adhesive layer,the evolution process of the adhesive layer failure under tensile shear load was analyzed based on transient dynamic model,and the joint deformation and stress distribution were given.The typical reference points were built,and the damage factor SDEG was used to reveal the damage mechanism and evolution process of the adhesive layer.The research results have laid a firm foundation for optimizing the structural design and analyzing the mechanical properties of complex adhesive structures.

关 键 词：胶接 脱粘 内聚力模型 损伤因子 

分 类 号：TG49[金属学及工艺—焊接]