Numerical Investigation on Stress Concentration of Corrosion Pit under Multi-axial Loading Condition
Numerical Investigation on Stress Concentration of Corrosion Pit under Multi-axial Loading Condition
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发表时间：
2013
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通讯作者：
Wang Chengchen
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作者：
Wang Chengchen
采用有限元软件Abaqus对拉扭载荷作用下点蚀区的应力集中进行了数值研究。通过建立一系列三维半椭圆孔蚀模型，研究了孔蚀在规则演化和不规则演化下的应力集中系数。通过有限元分析，得出凹坑深宽比（a/2c）是影响应力集中系数（SCF）的重要参数。坑，具有较高的纵横比，是非常危险的，并可能导致显着降低承载能力。当点蚀区发生局部溶解时，应力集中系数急剧增大，裂纹萌生的可能性比正常演化的点蚀区大
The stress concentration of pitting area under tension torsion loading conditions has been numerically studied by using fi nite element software Abaqus. The stress concentration factors of pits under regular evolution and irregular evolution have been investigated by conducting a series of three-dimensional semi-elliptical pitted models. Based on the fi nite element analysis, it is concluded that pit aspect ratio(a/2c) is a signif icant parameter affecting stress concentration factor(SCF). Pits, having higher aspect ratio, are very dangerous and may cause signifi cant reduction in the load carrying capacity. When local dissolution occurs in the pitting area, SCF will have a sharp increase, it is more probable for a crack to initiated from these areas compared with pits under regular evolution