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

SU HongYing; LIU RenDong; LI WenZhu; LIN Li; XU Xin

doi:10.16579/j.issn.1001.9669.2017.06.016

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

更新时间：2022-09-22

- EXPERIMENTAL STUDY ON J-INTEGRAL VALUE FOR THREE-POINT BEND SPECIMEN
- Journal of Mechanical Strength Vol. 39, Issue 6, Pages: 1348-1352(2017)
- 作者机构：
  
  1. 鞍山钢铁集团技术中心
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2017.06.016
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SU HongYing, LIU RenDong, LI WenZhu, et al. EXPERIMENTAL STUDY ON J-INTEGRAL VALUE FOR THREE-POINT BEND SPECIMEN. [J]. 39(6):1348-1352(2017)
DOI：

SU HongYing, LIU RenDong, LI WenZhu, et al. EXPERIMENTAL STUDY ON J-INTEGRAL VALUE FOR THREE-POINT BEND SPECIMEN. [J]. 39(6):1348-1352(2017) DOI： 10.16579/j.issn.1001.9669.2017.06.016.

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。

Abstract

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

Keywords

J-integral valueFracture toughnessThree-point bend specimen

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