Physical experiment and numerical simulation of the dynamic upsetting of cylinder
In order to study dynamic effects under impact loading conditions, physical experiment and numerical investigations on dynamic upsetting process of lead cylinder were conducted. Experiments were carried out on a drop hammer impact test machine. The results show that the deformed shape of specimen exhibits significant mushrooming. For the same specimen, the value of dynamic load is related to the tup velocity, radius-height ratio and drop mass. The dynamic load increases when the tup velocity or radius-height ratio increases. With the increase of tup velocity and drop mass, fluctuation of dynamic load curve becomes more obvious. Using the tup velocity-contact time curve obtained by experiment, deformation processes were simulated by dynamic explicit finite element program ANSYS/ LS-DYNA. The velocity field and equivalent strain distribution in deformed specimens were obtained. The metal flow law and deformation law during the dynamic upsetting processes were analyzed. The results show that the material point at the top flow faster and a strain concentration zone occurs in the center of upper part.
physical experiment dynamic upsetting drop hammer impact test dynamic load
Zhongjin WANG Lidong CHENG
School of Materials Science and Engineering, Harbin Institute of Technology,Harbin 150001, People’s Republic of China
国际会议
郑州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）