| 塑性约束对断裂韧度的影响 |
| |
| 引用本文： | 李庆芬 朱世范. 塑性约束对断裂韧度的影响[J]. 理化检验(物理分册), 1999, 35(2): 62-64,58 |
| |
| 作者姓名： | 李庆芬 朱世范 |
| |
| 作者单位： | 哈尔滨工程大学机电工程学院 哈尔滨150001 |
| |
| 摘 要： | 用三种钢材研究了不同ａ／Ｗ值对对ＣＯＤ和Ｊ积分值的影响，实验结果表明：浅裂纹的Ｊｉ及δｉ值远大于深裂值，用滑移线场理论及双参数断裂理论分析了塑性约束对断裂韧度的影响，并指出其在工程实际上的应用价值。
|
| 关 键 词： | J积分 COD 塑性约束 滑移线场 断裂力学 |
EFFECT OF PLASTIC CONSTRAINT ON DUCTILE TEARING IN THREE ALLOY STEELS |
| |
| Li Qingfen Zhu Shifan Li Yongdong Gao JianhuaCollege of Mechanical , Electrical Engineering,Harbin Engineering University. EFFECT OF PLASTIC CONSTRAINT ON DUCTILE TEARING IN THREE ALLOY STEELS[J]. Physical Testing and Chemical Analysis Part A:Physical Testing, 1999, 35(2): 62-64,58 |
| |
| Authors: | Li Qingfen Zhu Shifan Li Yongdong Gao JianhuaCollege of Mechanical & Electrical Engineering Harbin Engineering University |
| |
| Abstract: | The effect of plastic constraint on ductile tearing in three alloy steels were studied by measuring the COD and J-integral at initiation in three-point bend specimens with deep and shallow notches. Results show that the shallow crack specimens which have less constrainted flow field give markedly higher value of toughness than deeply notched specimens and are discussed with slip line field and two parameter theory. The standard frac-ture toughness test provides a lower bound estimation which ensure a safe but unduly conservative value of tough-ness. Therefore, a modified reasonable result should be taken for engineering applications. |
| |
| Keywords: | J-integral COD a (?)W Plastic constraint Slip line field |
| 本文献已被 CNKI 维普 等数据库收录！ |
