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裂纹开裂形式对陶瓷材料弹性模量仪器化压入测试结果的影响
作者:王家梁1 马德军1 罗涛2 孙亮1 
单位:1. 装甲兵工程学院机械工程系 北京 100072 2. 装甲兵工程学院科研部 北京 100072 
关键词:弹性模量 仪器化压入 径向裂纹 半硬币状裂纹 
分类号:TH 140.7
出版年,卷(期):页码:2015,43(6):803-808
DOI:10.14062/j.issn.0454-5648.2015.06.16
摘要:

基于有限元数值分析方法,对陶瓷材料(We/Wt=0.3~0.7)仪器化压入过程中产生的2种裂纹开裂形式——径向裂纹(RC)和半硬币状裂纹(HPC)对弹性模量测试值的影响进行了研究,并对不同载荷下不同裂纹形式的Si3N4、ZrO2、ZTA、Al2O3、Fused silica等陶瓷材料弹性模量仪器化压入测试结果进行比较。结果表明:RC和HPC裂纹开裂形式对陶瓷材料弹性模量仪器化压入测试结果的影响可以忽略,而“Pop-in现象”对陶瓷材料弹性模量仪器化压入测试结果影响较大。在不出现“Pop-in现象”的情况下,陶瓷材料弹性模量仪器化压入测试结果具有一定的有效性。

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 The effect of crack form (i.e., Radial Crack and Half-Penny Crack) on the elastic modulus instrumented indentation measurement value of ceramic material (i.e., We/Wt=0.3–0.7) was investigated based on the finite element analysis method. The elastic modulus instrumented indentation test results of ceramic materials such as Si3N4,ZrO2,ZTA,Al2O3, fused silica at different loads and crack forms were analyzed. The results show that the effect of RC and HPC forms on the elastic modulus instrumented indentation test results of ceramic material can be ignored. However, the effect of “Pop-in phenomenon” on the instrumented indentation test results of ceramic material is dominant. Therefore, when the “Pop-in phenomenon” does not occur, the elastic modulus instrumented indentation test results of ceramic material are valid in somehow. This paper provides a theoretical foundation for a further study on instrumented indentation determining the ceramic material elastic-plastic properties and fracture toughness.

基金项目:
军队科研计划项目(2013ZBJ03)。
作者简介:
王家梁(1986—),男,博士研究生。
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