Simulation Analysis of Force on Rotational Flexure Test of Ferrule Type Pipe Joint
In order to solve the problem of leakage caused by irregular swing during use of ferrule type pipe joint,the paper carried out rotational flexure test and force simulation analysis.According to ASTM F1387-1999(2012)standard rotary flexure test method,different tensile strength was applied to the 1/4OD″ ferrule type pipe joint rotation to more than 1 million times,re-sulting in leakage.Then nondestructive fluorescence penetration and metallographic microscopy were used to macroscopically analyze the leakage of the ferrule type pipe joint.It is found that the crack leakage is concentrated at the joint between the front end of the ferrule and the pipe fitting.The simulation analysis with ANSYS software shows that the concentrated stress area of the ferrule type pipe joint is basically consistent with the leakage position in the rotational flexure test.Therefore,in use,attention should be paid to whether there is leakage at the front end of the ferrule and the bite of the pipe fitting to avoid safety hazards.
ferrule type pipe jointrotational flexuresimulation analysissealstressfatigue life
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