非对称齿形下的压痕问题分析  

ANALYSIS OF INDENTATION PROBLEM WITH AN ASYMMETRIC INDERTER

作　　者：刘广松[1] 庄茁[1] 朱万旭 唐小萍 

机构地区：[1]清华大学工程力学系,北京100084 [2]柳州欧维姆建筑机械有限公司,柳州545005

出　　处：《机械强度》2002年第3期373-376,共4页Journal of Mechanical Strength

摘　　要：非对称齿形的压痕问题要比分析轴对称压头情况复杂得多。受压基体中的应力—应变分布、塑性硬化面的发展方向等力学特性 ,都随着齿形非对称程度和角度不断变化。通过量纲分析 ,文中建立了受压基体中的位移随外力变化的函数关系式 ,计算分析这个关系式随齿形的变化趋势 ;并利用数值模拟结果分析压头齿形变化对应力和能量产生的影响。It is much more complex to study the indentation under an asymmetric indenter shape than a symmetric one. The shape of indenter will influence many mechanical properties of indentation, such as distributing of the strain and stress, extending of the hardening surface, etc. Based on dimensional analysis, a function has been developed between the indentation displacement and the external force. The variation trend of function has been computed when the indenter shape changes. The numerical simulation has also been made to analyze the influence of stress sensitive and energy variation with the inderter shape. The optimal proposal of indenter shape for the pre-stressed clamping apparatus has been put forward in the industry.

关 键 词：压痕 非对称压头 有限元 预应力锚具 

分 类 号：O343.3[理学—固体力学] TH123[理学—力学]