摘要
本文在Ｌａｎｄｅｓ规则化方法基础上提出单试件确定塑性因子法，即只使用单个试件的实验记录Ｐ，Ｖ和ａ就可求得材料塑性因子ηｐｌ．其中实时裂纹长度ａ可以卸载柔度法或物理测量得到．通常规则化方法需一组试件．单试件法可避免多试件存在的尺寸分散性，也可使实验过程简化．文中结合３０４不锈钢实验进行分析，结果表明单试件法简便、实用、精度较高．
A method to determine the plastic factor η pl of J Integral based on the measurement for a single material specimen in presented. Compared with the conventional method, it has the advantage of avoiding errors from differences of specimens and simplifying the test process. A test example for 304 stainless steel shows that the single specimen method is simple, practical and accurate.
出处
《实验力学》
CSCD
北大核心
1997年第3期475-480,共6页
Journal of Experimental Mechanics
基金
国家核安全局资助
西安交通大学机械结构强度与振动国家重点实验室研究基金
关键词
J-R阻力曲线
塑性因子
断裂
单试件法
J积分
J-R resistance curve, plastic factor, load separable principle, normalization method, stationary crack, precrack specimen
