Research on Resistance Performance of Expandable Crushing Pipe Based on Numerical Simulation

In order to study the resistance performance of expandable crushing pipe, the differences of two methods between numerical simulation and physical tests were compared and summarized, and the effectiveness of the numerical simulation method were verified. At the same time, the influence of the main design parameters such as the induced cone angle, wall thickness and diameter on the resistance of the expansive collapse pipe was studied, based on the numerical simulation software platform and ALE adaptive algorithm. And combined with the performance characteristics of the actual expandable crushing pipe, the research and development ideas of how to control the variables to achieve rapid development in actual production were introduced. The results show that when the rang of induced cone angle is from 15°to 45°,the larger the angle is, the larger the resistance of expandable crushing pipe is; the resistance of expandable crushing pipe increases with the increase of the wall thickness; the diameter has a very limited influence on the resistance of expandable crushing pipe. When we design the expandable crushing pipe, the diameter should be firstly determined based on the installing space size; then we take the wall thickness as the selected condition, the range of the wall thickness is determined by controlling the variable based on simulation; at last, we match and optimize the parameter such as the induced cone angle based on the performance requirement, and the final design is completed.