Calculation and Finite Element Simulation of Ultimate Collapse Strength of Drivepipe

Geometric size measurement, tensile test, and residual stress test were performed on 110 steel drivepipe, and the average ultimate collapse strength of the drivepipe was calculated by the first order second moment method. Collapse test was carried out on the drivepipe, and the ultimate collapse strength of the drivepipe was simulated by finite element model. The calculated results, simulated results and tested results of the ultimate collapse strength were compared. The results show that the calculated results of the average ultimate collapse strength of test drivepipe was higher than the target confidence level and close to the tested results. The calculation method was suitable for calculating the ultimate collapse strength of test drivepipe. The finite element simulated results of the ultimate collapse strength of each drivepipe were close to the tested results, and the relative errors were less than 5.8%, and the finite element simulation was accurate.