内聚力界面单元在胶接接头分层仿真中的应用  

The Simulation of The Process of Laminal Damage in the Adhesive Bonded Joint Using the Cohesive Interface Element

作　　者：杨小辉[1] 胡坤镜[1] 赵宁[1] 李静[2] 

机构地区：[1]西北工业大学机电学院,陕西西安710072 [2]中国空间技术研究院西安分院,陕西西安710000

出　　处：《计算机仿真》2010年第10期317-320,360,共5页Computer Simulation

摘　　要：分层是胶接接头的主要破坏形式,而分层主要发生在胶层与被粘物的界面层上,因此,对胶接接头界面层的力学行为的分析是很有必要的。由于界面层厚度太小,用常规的有限元法或边界元法很难对其进行仿真,更加无法仿真胶接接头的分层损伤过程。针对上述情况,为提高接头结构承载力,采用零厚度的内聚力界面单元来仿真界面层,克服无法仿真界面层的困难,对胶接接头的分层损伤过程进行仿真,并与试验结果进行对比,验证方法的有效性。通过仿真分析结果与试验结果对比可知,仿真分析结果与试验结果吻合较好。因此,运用内聚界面单元仿真界面层方法是有效的,并为复杂胶接接头承载能力分析提供有力的依据。Laminal damage is a main type of damage in the adhesive bonded joint,and it often occurs in the interface layer of the joint.So,it is necessary to analyze the mechanical action of the interface layer.However,because the thickness of the interface layer is very small,it is difficult to simulate the interface layer by regular finite element method or boundary element method,and it is also difficult to simulate the process of laminal damage.To address this situation,in the paper,we use the cohesive interface element with the thickness of zero to simulate the interface layer to get the rule of laminal damage,and contrast with experimental result to validate the validity of the method.By contrasting with experimental result,we find that the result in the simulation is similar to the result in the experiment.So,the method of using the cohesive interface element to simulate the interface layer is effective,it is useful for carrying capacity＇s analysis of complex joint.

关 键 词：内聚力界面单元 胶接接头 分层损伤 界面层 

分 类 号：TH132.4[机械工程—机械制造及自动化]