三点弯曲试样测试J积分值试验研究  

EXPERIMENTAL STUDY ON J-INTEGRAL VALUE FOR THREE-POINT BEND SPECIMEN

作　　者：苏洪英 刘仁东 李文竹 林利 徐鑫 

机构地区：[1]鞍山钢铁集团技术中心,鞍山114009

出　　处：《机械强度》2017年第6期1348-1352,共5页Journal of Mechanical Strength

摘　　要：采用两个不同钢种的三点弯曲试样,以载荷-缺口张开位移曲线下的塑性面积为基础计算J积分值,依据GB/T 21143-2014和GB/T 21143-2007、GB/T 2358-1994附录D两个标准相结合,用这两种不同的方法计算J积分值。结果表明:相对于不同的裂纹扩展量Δa,J积分值从低值到高值,两种方法计算J积分值的平均相对偏差<2.0%,结果一致,说明用GB/T 21143-2007、GB/T 2358-1994附录D两个标准相结合也可以准确计算J积分值,提供了一种用三点弯曲试样测试J积分值的计算方法。Using two different kinds of three-point bend specimens,J-integral values calculated based on plastic area of under load-notch-opening displacement curve, according to GB/T 21143-2014 and GB/T 21143-2007, GB/T 2358-1994 appendix D two standards,combining with the two different methods to calculate the J-integral values. The results showed that with respect to the different crack extension △a,J-integral values from low to high values,the average relative deviation of two methods J-integral value 〈2. 0%,illustrated with GB/T 21143-2007,GB/T 2358-1994 Appendix D combined two standards can also accurately calculate the J-integral values,a method of calculating the J-integral values using a three-point bending specimen was provided.

关 键 词：J积分值 断裂韧性 三点弯曲试样 

分 类 号：O346.1[理学—固体力学]