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JM积分在低强钢焊接接头应力腐蚀破裂计算中的应用

THE APPLICATION OF J M INTEGRAL IN PREDICTION OF STRESS CORROSION CRACKING OF LOW STRENGTH STEEL WELDED JOINT

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【作者】 潘希德董俊明陈泽忻薛锦戚继皋

【Author】 Pan Xide Dong Junming Chen Zexin Xue Jin Qi Jigao (Xian Jiaotong University,710049,Xian)

【机构】 西安交通大学

【摘要】 运用悬臂弯曲应力腐蚀破裂(SCC)试验的方法,研究了低强钢焊接接头的应力腐蚀裂纹(SCcrack)的亚临界稳定扩展问题.提出了用弹塑性断裂力学(EPFM)参量JM描述应力腐蚀裂纹尖端应力应变场;分析了在SCC条件下JM的计算方法,通过试验与计算测得了焊接接头各区的da/dtJM曲线,并分析了各区的SCC敏感性大小

【Abstract】 An investigation has been made of stress corrosion crack(SC crack)subcritical stable propagation in low strength steel welded joint in boiling mixed nitrate solution by the use of pre cracked cantilever beam bend speciments.A J like parameter, J M integral, is employed to characterize the stress and strain at the SC crack tip and to predict the crack growth rate d a /d t .A methodological analysis of calculating J M in the condition of stress corrosion cracking(SCC)is given.A group of typical curves of crack growth rate d a /d t vs. J M are obtained.The sensibility of different regions in the welded joint to SCC is also investigated.

  • 【文献出处】 西安交通大学学报 ,JOURNAL OF XI’AN JIAOTONG UNIVERSITY , 编辑部邮箱 ,1996年07期
  • 【分类号】TG407
  • 【被引频次】1
  • 【下载频次】62
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