摘要
纯弯曲的Ｓａｎｄｗｉｃｈ梁试样在评价界面断裂抗力方面有重要作用。利用能量的叠加原理和截面转换方法，本文导出了纯弯曲Ｓａｎｄｗｉｃｈ梁试样界面裂纹扩展应变能释放率的显式解，并根据实验测得的界面裂纹扩展的临界载荷，用其计算出了四点弯曲Ｓｉ３Ｎ４／Ａｌ／Ｓｉ３Ｎ４试样Ｓｉ３Ｎ４／Ａｌ扩散连接界面的断裂韧度。
Pure bend sandwich beam specimen plays an important part in evaluating the fracture resistance of interface. The explicit solution of the strain energy release rate of crack propagation along the pure bend sandwich beam specimen has been deduced in the paper by use of the superposition principle of the energy and section inversion method. Based on the critical load of crack propagation along the interface through the testing measurement, the fracture toughness of four point bending Si 3N 4/Al/Si 3N 4 specimens along Si 3N 4/Al diffusion joining interface has been obtained by using the explicit solution.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
1999年第1期72-76,共5页
Acta Materiae Compositae Sinica
关键词
界面
断裂力学
应变能释放率
连接界面
纯弯梁
interface fracture mechanics, strain energy release rate, joining interface
