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Study on Generalized Criteria of Interfacial Strength between Dissimilar Materials

异种材料间界面强度通用准则的研究

基本信息

批准号：
12450045
负责人：
KISHIMOTO Kikuo
金额：
$ 5.63万
依托单位：
TOKYO INSTITUTE OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

The purpose of this project is to establish the generalized fracture criteria for bonding interfaces. From the observation of damage process and fracture phenomena in bonding interface between dissimilar materials, interfacial damage model based on damage mechanics was developed. Then, by using this interfacial damage model to numerical simulations, the generalized fracture criteria of interfacial fracture were investigated. The mixed mode fracture tests were also conducted and the validity of this generalized fracture criteria was studied. The research results of this project are summarized as following,1. The cohesive zone model including loading histories and friction effect at the interface has been proposed.2. The numerical simulations for mixed fracture test under elastic and elastic-plastic analysis were carried out. Then, the fracture criteria based on the interfacial stress intensity factors can be describe as the elliptical shape.3. It is shown that the characteristic length … More included in interfacial stress intensity factors can be considered as the fracture process zone ahead of the crack tip. By using this characteristic length, the generalized fracture criteria can be obtained in any kind of material pairs if the mechanical properties of the interface are same.4. The mixed mode fracture tests for bonding specimen were conducted and the fracture criteria of the bonding interface were obtained. It is shown that the generalized fracture criteria can be applied to the bonding fracture test.5. The new peel test method to measure the interface strength under several kinds of phase angles has been developed. This test method is called as Multi-stages peel test. The peel strength of multi-layer films, that is composed of Si/PI/Cr/Cu, were measured. In conventional method, the thickness of peeled film was influenced to the peel strength. However, by considering the energy balance under the steady-state peeling, the peel strength independent of film thickness can be obtained. Less

本计画的目的是建立一般化的胶接界面断裂准则。通过对异种材料粘接界面损伤过程和断裂现象的观察，建立了基于损伤力学的界面损伤模型。然后将该界面损伤模型应用于数值模拟，研究了界面断裂的广义断裂准则。进行了复合型断裂试验，并对广义断裂准则的有效性进行了研究。本课题的主要研究成果如下：1.提出了考虑加载历史和界面摩擦效应的粘聚力模型.对复合断裂试验进行了弹性和弹塑性分析的数值模拟。基于界面应力强度因子的断裂准则可以用椭圆形来描述.结果表明，特征长度 ...更多信息包括在界面应力强度因子中的断裂过程区可以看作是裂纹尖端前的断裂过程区。利用该特征长度，可以得到任意材料对在界面力学性能相同的情况下的广义断裂准则.进行了复合型断裂试验，得到了复合界面的断裂判据。结果表明，广义断裂准则可以应用于粘接断裂试验.提出了一种新的测试不同相位角下界面强度的剥离试验方法。该测试方法称为多阶段剥离测试。测试了Si/PI/Cr/Cu多层膜的剥离强度。在常规方法中，剥离膜的厚度对剥离强度有影响。然而，通过考虑稳态剥离下的能量平衡，可以获得与膜厚度无关的剥离强度。少