结合均匀材料裂纹结构应力场解的研究成果,讨论了平面应变状态下,焊接接头裂端应力场的J～Q双参数描述方法.考虑到焊接接头力学不均匀性对J积分和三轴性应力因子Q的影响,利用有限元数值解对J积分和Q因子的分布规律进行了研究,结合工程实际,进一步通过曲线拟合得到了焊接接头裂端应力场的工程估算公式,并对估算公式的有效性进行了验证.
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