相变增韧陶瓷平面应变Ⅰ型定常扩展裂纹的渐近分析(Ⅱ)<sup>*</sup>

张浠; 叶裕恭

相变增韧陶瓷平面应变Ⅰ型定常扩展裂纹的渐近分析(Ⅱ)^*

张浠¹,
叶裕恭²

1.
核工业总公司中南工学院, 衡阳 421001;
2.
中国科学院力学研究所, 北京 100080

基金项目: * 国家自然科学基金

计量
- 文章访问数: 1992
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- 被引次数: 0
出版历程
- 收稿日期: 1996-04-17
- 修回日期: 1997-04-17
- 刊出日期: 1997-07-15

Asymptotic Analysis of Plane-Strain ModeⅠSteady-State Crack Growth in Transformation Toughening Ceramics(Ⅱ)

Zhang Xi¹,
Ye Yugong²

1.
Zhongnan Institute of Technology, Hengyang, Hunan 421001, P. R. China;
2.
Institute of Mechanics,Chinese Academy of Sciences, Beijing 100080, P. R. China

摘要

摘要: 本文采用一种考虑相交剪切变形的陶瓷材料本构关系,对平面应变Ⅰ型定常扩展裂纹尖端场进行渐近分析.给出了裂纹尖端附近环形域内的应力、速率分布以及应力奇异性指数.对不同材料参数下的变化规律进行了详细的分析和讨论.
- 相变增韧陶瓷 /
- 剪切效应 /
- 扩展裂纹 /
- 渐近解
Abstract: Based on a constitutive law which includes the shear components of transformation plasticity, the asymptotic solutions to near-tip fields of plane-strainmode I steadity propagating cracks in transformed ceramics are obtained for the case of linear isotropic hardening. The Stress singularity, the distributions of stresses and velocities at the crack tip are determmed for various material parameters. The factors influencing the near-tip fields are discussed in detail.
- transformation toughening ceramics /
- shear effect /
- crack growth /
- asymptotic method

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参考文献(12)

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