Experimental study on Poisson's ratio of zirconium alloy thin-walled tube based on internal pressure method
The problems of deformation and rupture of zirconium alloy cladding tubes in nuclear power applications seriously affect the safety of nuclear power operation.In order to better evaluate the deformation performance of thin-walled tubes such as zirconium alloy cladding tubes under internal pressure,and provide reference for the design,calculation and verification of fuel assembly,a Poisson's ratio test method based on internal pressure method was designed.According to the stress solution of the thin-walled tube under uniform internal pressure,the theoretical formula for obtaining the Poisson's ratio of the thin-walled tube by applying internal pressure is derived.Design reasonable internal pressure test method according to the theoretical formula,this method is used to carry out Poisson's ratio test at 20℃to 400℃for N36 zirconium alloy thin-walled tube,and the comparative test at corresponding temperature is carried out by tensile method.The results show that the internal pressure test method can effectively obtain the Poisson's ratio of zirconium alloy thin-walled tube at different temperatures.And the Poisson's ratio of zirconium alloy thin-walled tube obtained by the internal pressure test method is consistent with the results obtained by the tensile method,and the relative errors are all within 2%.At the same time,the test results show that the Poisson's ratio of N36 zirconium alloy thin-walled tube increases with the increase of test temperature.
internal pressure methodzirconium alloythin-walled tubePoisson's ratio
万方数据
维普
