Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 18 No. 5 October 2008|
（Department of Plasticity Engineering, Shanghai Jiao Tong University, Shanghai 200030, China）
Abstract:To eliminate the defects during piston skirt isothermal forming process, simulations under different process parameters such as the deformation temperature and friction factor were analyzed with the rigid-plastic FEA. Deformation pattern, metal flow and influence of process parameters were concluded. The prediction load value with a relative error of 4.98% is more accurate to the testing one than that from the empirical formula whose relative error is up to 50.8%. Finally, based on the simulation results, an improved process at 300 ℃ and 0.005−0.05 s−1 was verified without any defects by the physical try-out.
Key words: finite element analysis(FEA); piston skirt; isothermal forming; internal combustion engines