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含半球形腐蚀缺陷钢管剩余强度的有限元分析

, PP. 281-286

Keywords: 有限元方法,半球形腐蚀缺陷,剩余强度,等效应力

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Abstract:

通过有限元方法分析了含单个不同深度半球形腐蚀缺陷钢管,在不同服役条件(压力状态)下的应力和应变状态,即缺陷深度和半径分别为1/8,1/4和1/2钢管公称壁厚时,得出不同状态下vonMises等效应力和vonMises等效应变分布情况。同时计算了含不同深度半球形缺陷管道的剩余强度,并给出剩余强度随缺陷深度的经验公式,结果显示含半球形缺陷管道剩余强度随缺陷深度的增加而线性降低。

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