Study on the Effect of Crack Stress Intensity Factor on Tanker Truck Storage Tank
For the safety of tank storage tanks,failures caused by cracks are particularly common,and open cracks are the main form of failure.In addition,the tank shell is subjected to the corrosive effect of oil for a long time,resulting in the formation of corrosion pits of various sizes.In this paper,we investigate the factors affecting the stress intensity factor of cracks in tank truck storage tanks and analyze the law of the influence of crack size and corrosion pit on the stress intensity factor.Based on the finite element expansion method,a three-dimensional model of a tank with cracks is established;the interaction integration method is used to calculate the crack stress intensity factor.Taking into account the influence of corrosion pits,the law of the influence of corrosion pit size on the stress intensity factor is analyzed.The results of the study show that the stress intensity factor of the open crack increases with increasing crack size;in addition,the corrosion pit stress intensity factor also has a more obvious effect,the stress intensity factor will increase with the depthand radius of the corrosion pit increasing.
open type crackscorrosion pitstress intensity factorstorage tanks
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