| 焊接表面裂纹J积分直接测试法研究 |
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| 引用本文： | 李继红,张建勋,裴怡.焊接表面裂纹J积分直接测试法研究[J].机械强度,2000,22(2):149-152. |
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| 作者姓名： | 李继红 张建勋 裴怡 |
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| 作者单位： | 西安交通大学,机械工程学院焊接研究所,西安,710049 |
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| 基金项目： | 本研究获国家教委博士点基金资助。 |
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| 摘 要： | 对半椭圆形表面裂纹弹塑性断裂力学参量Ｊ积分的直接测试方法进行了深入分析，并在此基础上，实际测试了存在于均匀母材试样及力学性能不均匀的高匹配焊接接头焊缝区的表面裂纹的断裂力学参量Ｊ积分。
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| 关 键 词： | 焊接接头 表面裂纹 J积分 直接测试法 |
| 修稿时间： | 1999-01-18 |
STUDY ON DIRECT EVALUATION OF J-INTEGRAL OF SURFACE CRACK IN WELDMENTS |
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| LI Jihong,ZHANG Jianxun,PEI Yi.STUDY ON DIRECT EVALUATION OF J-INTEGRAL OF SURFACE CRACK IN WELDMENTS[J].Journal of Mechanical Strength,2000,22(2):149-152. |
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| Authors: | LI Jihong ZHANG Jianxun PEI Yi |
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| Affiliation: | LI Jihong
,ZHANG Jianxun
,PEI Yi
;(Welding Research Institute, Mechanical Engineering College, Xi'an Jiaotong University, Xi'an 710049, China) |
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| Abstract: | The direct evaluation system of the elasti-plastic fracture mechanics parameter for semi-elliptical surface cracks is developed. Based on the system, surface cracked tensile panels were instnnnented with strain gages and the J-integral of surface cracks at base metals and weld metals in overmatched weldments with mechanical heterogeneity have been investigated. It is shown that the direct evaluation system can be used to study the effects of welding mechanical heterogeneity on the fracture mechanical parameter of weldments with surface crack, and that the elastic-plastic fracture mechanics parameter J-integral increases with the decreasing of the matching ratios of welded joints. |
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| Keywords: | welded joint surface crack |
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