Experimental and numerical study of stamp hydroforming of sheet metals

Outflow Characteristics of a Pressure Medium during Sheet Hydroforming

“…16) With the rapid increase in computation power, numerical simulations have become easier to implement so various studies using finite-element methods (FEMs) have recently been reported. 10,13,[17][18][19][20] The authors are developing a new static FEM program for modeling SHF. 21) The simulation of an elliptical-cup deep-drawing process in which there is no outflow of the pressure medium has been carried out using this program, and it was shown that the results of the simulation are in good agreement with the results of experiments.…”

Finite-element simulation of the elliptical cup deep drawing process by sheet hydroforming

“…Several studies on the formability of SHF using finite-element method (FEM) have also been reported [2,[5][6][7][8][9] and the recent studies are summarized in the review article by Lang et al [10]. It is, however, still difficult to attain adequate simulated results of SHF processes.…”

FEA-Based Optimization of Blank Holder Force and Pressure for Hydromechanical Deep Drawing of Parabolic Cup using Greedy Search and RSM Methods

“…Using the least square polynomial approximation, the response surface over the feasible region, which has been determined through the 2-D interval halving method, is given by Eqs. (12)(13)(14)(15)(16). The feasible values of BHF and pressure from 2-D interval halving method are input in Eq.…”

“…From conducting several hydromechanical deep drawing simulations of AISI 1008 parabolic parts, the parts cracked at minimum major and minor strains around 0.39 and 0.09, respectively. This strain condition is located just above the FLC (derived from M-K model [16]) on right hand side, which corresponds to part thinning of 39%. The location of crack site is in the punch nose area and it is found to be in the same location as the part thinnest area as well, 39% as shown in Figure 5.…”