中国机械工程2011，Vol.22Issue(3)：360-363,4.
共晶界面复合陶瓷桥联增韧结果及其尺度效应
Bridging Toughening Result and Size Dependent of Ceramic Composite with Eutectic Interphases
摘要
Abstract
According to the microstrcture characteristics of composite ceramic with eutectic interphase, considering the micro slipping on the boundaries of eutectic rods, the bridging stress of eutectic rod was determined. Considering the random orientation of the eutectic rods, the bridging load of eutectic rods was computed by the bridging stress. The bridging load can make crack closure and reduce the stress concentration of the crack tip, the energy dissipative value of the bridging load was obtained. Based on the relationship between fracture toughness and energy dissipation, the bridging toughening result of the eutectic rod and its size dependence were analyzed. The results show that as the diameter of fiber inclusion increases, the bridging toughening value may lessen, especially when the diameter is in nanometer scale, the size dependence can be more apparent.关键词
棒状共晶体/纤维夹杂/桥联应力/桥联增韧/尺度效应Key words
eutectic rod/ fiber inclusion/ bridging stress/ bridging toughening/ size dependence分类
数理科学引用本文复制引用
孙涛,倪新华,刘协权,李宝峰,赵磊,钟国辉..共晶界面复合陶瓷桥联增韧结果及其尺度效应[J].中国机械工程,2011,22(3):360-363,4.基金项目
国家自然科学基金资助项目(10872216,51072229) （10872216,51072229）
