in sheet metal forming processes, one-stage production of conical-cylindrical parts with high accuracy is very difficult due to wrinkling and rupturing. hydrodynamic deep drawing assisted by radial pressure is one of the most applicable procedures in sheet hydroforming process on the point of producing conical-cylindrical parts. in this paper, forming pressure path is investigated as one of the...

Abstract A non-linear finite element technique is used to study the progressive forming process of sheet, and elastic-plastic distribution analyzed based on Abaqus/Explict. Finite simulations with different parameters were carried out analyse effects tool head diameter, layer feed sheet properties quality. The results show that increasing diameter or decreasing will result in better quality, in...

Stable ductile crack growth in 3 mm thick AISI 304 stainless steel specimens has been investigated experimentally and numerically. Multi-linear Isotropic Hardening method coupled with the Von-Mises yield criterion was adopted for modeling elasto-plastic behavior of the material. Mode-I CT fracture specimens have been tested to generate experimental load-displacement-crack growth data during sta...

shape error due to elastic recovery of formed part in unloading known as springback, is one of the most important problems of tool design in sheet metal forming processes. many researches have been performed for proposing an efficient method to decrease or compensate springback error in sheet forming processes. these methods are usually based on iterative finite element algorithms. in this pape...

frictional shear stress is usually determined by utilizing the coefficient of friction or the constant friction factor models. the present study deals with finite element analysis of double cup extrusion process to determine the relationship between constant friction factor (m) and coefficient of friction (µ), since the metal flow in this process is very sensitive to frictional conditions. ther...

Since the deformation region involves interaction of electric-thermal-force coupling in electric hot incremental sheet forming, numerical simulation forming process is unusually difficult. Currently, thermal-force method adopted to simulate approximately whole process, and Joule heating effect often ignored. Therefore, especially significant for prediction accuracy process. In this paper, a nov...