Measurement of Interfacial Fracture Toughness Under Combined Mechanical and Thermal Stresses
Measurement of Interfacial Fracture Toughness Under Combined Mechanical and Thermal Stresses
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机械应力和热应力联合作用下界面断裂韧性的测量
DOI：
10.1115/1.2792645
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发表时间：
1998
影响因子：
1.6
通讯作者：
P. Borgesen
中科院分区：
文献类型：
--
作者：
J. Jiao;C. Gurumurthy;E. Kramer;Y. Sha;C. Hui;P. Borgesen
用不对称双悬臂梁技术测量了聚酰亚胺钝化/填充界面的界面断裂抗力。作为其中一个梁，在标准的环氧树脂上涂覆一层薄薄的聚酰亚胺，并将底部填充流过聚酰亚胺薄膜并固化以形成第二个梁。通过改变两梁的厚度比，系统地改变了热应力和机械应力的相对贡献。结果表明，在计算临界应变能释放率时，必须考虑热残余应力的影响，才能得到界面断裂能。
The interfacial fracture resistance of a polyimide passivation/underfill interface was measured using an asymmetric double cantilever beam technique. A thin layer of polyimide was coated on a standard epoxy as one of the beams and an underfill was flowed over the polyimide film and cured to form the second beam. The relative contributions of the thermal and mechanical stress were systematically varied by varying the thickness ratio of the two beams. The results indicate that the effect of thermal residual stress must be taken into account in the calculation of critical strain energy release rate to obtain the interfacial fracture energy.