叠层结构陶瓷强韧化设计的力学分析  

A MECHANICS ANALYSIS OF STRENGTHENING-TOUGHENING DESIGN OF MULTILAYER STRUCTURE CERAMICS

作　　者：郭香华[1] 蔡乾煌[1] 汪长安[2] 黄勇[2] 

机构地区：[1]清华大学工程力学系,北京100084 [2]清华大学材料科学与工程系,北京100084

出　　处：《固体力学学报》2000年第4期313-324,共12页Chinese Journal of Solid Mechanics

基　　金：国家自然科学基金资助项目!(批准号 :5 96 32 0 90 )

摘　　要：基于梁的理论和裂纹在异材界面上拐折与扩展条件 ,对叠层结构陶瓷弯曲试件的强度与韧性进行了力学分析 ,获得叠层结构中陶瓷基片和界面层的材料性能、结构几何参数与叠层结构弯曲强度、韧性间的定量解析关系 ,给出相应的影响曲线 ,并对Si3N4 /BN叠层结构四点弯曲试样断裂功的理论值与实验结果作对比讨论 .Based on theory of beam and cracking and kinking condition of crack in bimaterial interfaces, the mechanics analysis is made on strength and toughness of multilayer structure ceramics in symmetric four point bending. An analytic relation that relates strength, toughness of the bending specimen and material properties, structures geometric parameters of the ceramic sheet and interfacial layer is obtained. Finally, the corresponding relative curves are given and the theoretical value of fracture work for Si 3N 4/BN multilayer structure is compared with the experimental result.

关 键 词：叠层结构陶瓷 载荷-位移曲线 界面断裂韧性 强韧化设计 力学分析 

分 类 号：TQ174[化学工程—陶瓷工业]