硬化材料切口根部应力-应变集中与理论应力集中的关系  

Relationship Between Stress-Strain Concentration at Notch tip and Theoretic Stress Concentration for Work-hardening Material

作　　者：张忠平[1] 王锋会[2] 郑茂盛[3] 孙强[1] 解武杰[1] 

机构地区：[1]空军工程大学,西安710038 [2]西北工业大学,西安710072 [3]西安交通大学,西安710049

出　　处：《应用力学学报》2000年第4期99-104,共6页Chinese Journal of Applied Mechanics

摘　　要：以含浅切口的硬化材料为对象，以平面应变条件下切口根部附近的应力-应变分布为出发点，利用应力平衡法，研究了Neuber准则及Moski-Glinka公式的有效性。发现无论是Neuber准则还是Moski-Glinka公式，都没能很好地反映切口根部的应力-应变集中与理论应力集中的关系。因此，本文作者综合Neuber准则及Moski-Glinka公式，提出了一个更能正确反映切口根部应力-应变集中与理论应力集中关系的表达式。In the present paper, both the stress-strain distribution near shallow notch ti p for work-hardening material under plane strain condition and the stress balan ce method are used to study the effectiveness of Neuber’s rule and that of Mosk i -Glinka’s (M-K’s) relation. It is found that whether Neuber’s rule or M-K ’s relation does not reflect well the relationshp between stress-strain concen tration at the notch tip and theoretic stress concentration. Therefore, united N eube’s rule with M-K’s relation, the expressioin that reflects well the relat ionship between stress-strain concentration at the notch tip and theoretic str ess concentration is proposed.

关 键 词：硬化材料 浅切口 应力集中 应变集中 应变能密度 

分 类 号：TB301[一般工业技术—材料科学与工程]