2D和2.5D编织陶瓷基复合材料加载速率效应和应力-应变行为模拟  

Experiment Study and Stress-strain Behavior Theoretical Simulation on the Load Speed Behavior of 2D and 2.5D Ceramic Matrix Composites

作　　者：陶永强[1] 矫桂琼[1] 王波[1] 常岩军[1] 

机构地区：[1]西北工业大学力学与土木建筑学院,陕西西安710072

出　　处：《材料科学与工程学报》2009年第1期12-16,共5页Journal of Materials Science and Engineering

基　　金：自然科学基金资助项目(90405015);高等学校博士学科点专项科研基金资助项目(20030699040)

摘　　要：对A、B、C三种工艺制备的2D和2.5D编织陶瓷基复合材料进行了准静态拉伸试验,试验采用的加载速率分别为0.02mm/min、0.2mm/min、1mm/min、5mm/min、25mm/min、125mm/min。获得了不同加载速率下,2D和2.5D编织陶瓷基复合材料的应力-应变曲线。基于所获得试验结果,讨论了加载速率对2D和2.5D编织陶瓷基复合材料力学性能产生影响的原因。试验结果表明:A、B工艺的2.5D编织陶瓷基复合材料对加载速率的变化不敏感;C工艺的2D编织陶瓷基复合材料对加载速率变化不敏感,而A工艺的2D编织陶瓷基复合材料对加载速率变化较为敏感,随着加载速率的增加,材料的初始弹性模量有较大程度的增大,破坏应变有所减小。基于基体强度分布理论,模拟了对加载速率不敏感的2D编织陶瓷基复合材料在拉伸载荷下的应力-应变行为。The tensile behavior of 2.5D and 2D weave ceramic matrix composites with different manufacturing technics （2.5D-A,B and 2D-A, C） and different load speeds was investigated. The load speeds of tensile test are 0. 02mm/min, 0.2mm/min,1mm/min, 5mm/min, 25mm/min, 125mm/min, respectively. The tensile stress-strain curves were obtained under different manufacturing technics and different load speeds. The results show that 2.5D-A, B and 2D-C weave ceramic matrix composites are independent of load speed. However, 2D-A weave ceramic matrix composite is relevant to load speed. Along with load speed increasing, initiative elastic modulus of 2D-A weave ceramic matrix composite increase and failure strains reduce. Basing on matrix strength distributing theory, stress-strain behavior of 2D-C weave ceramic matrix composite is gained; and theoretical result is well agreed with experimental result.

关 键 词：陶瓷基复合材料 加载速率 2D 2.5D 应力-应变行为 

分 类 号：TB332[一般工业技术—材料科学与工程]