Effect of tension-compression testing strategy on kinematic model calibration and springback simulation of advanced high strength steels

A Review of Characterization and Modelling Approaches for Sheet Metal Forming of Lightweight Metallic Materials

“…However, hexagonal close-packed (HCP) metals, such as magnesium alloys and titanium alloys, show obvious tension-compression asymmetry (TCA), i.e., strength differential (SD) effect under small plastic strain [ 137 , 138 ]. In addition, recent studies have found that third-generation advanced high-strength steels (AHSS) such as Q&P steels exhibit significant SD effect [ 21 , 139 , 140 ]. The above symmetric yield criterion cannot be used to describe the SD effect of special lightweight alloys.…”

“…The key to developing the mechanical characterization for measuring the hardening curve of the sheet metals under TC is the same as that of the UC tests, which require the design of the anti-buckling fixture. The measured stress–strain curves under TC loadings are used to characterize the Bauschinger effect and to calibrate and validate the kinematic or distortional hardening models [ 21 , 170 , 179 , 245 , 288 , 289 , 290 , 291 , 292 ].…”

“…Many industrial sectors and research development centers have employed numerical simulations to optimize complex processes [ 12 , 13 , 14 ]. Numerical simulation can predict the forming forces, deformation behavior of sheet metals, sheet thickness, temperatures, stresses distributions [ 15 , 16 , 17 , 18 ], springback [ 19 , 20 , 21 , 22 ] and potential cracking and wrinkling [ 19 , 23 , 24 ], as introduced in Figure 4 . Furthermore, numerical simulation has also been applied for characterizing the behaviors of materials at the microscale, which is based on crystal plasticity (CP) modelling [ 25 , 26 , 27 ].…”

Plastic deformation of ultra-thin pure titanium sheet subject to tension-compression loadings

“…An assembly of the anti-buckling support fixture, universal testing machine and DIC system, as shown in figure 1a, was used for the UC testing. Two solid flat plates were used to prevent buckling of specimen (see figure 1b), and the uniform compression deformation of thin (1.0~2.0 mm) sheet metals were successfully achieved by this design [4,[13][14][15]. Note that the strain field was measured optically by DIC techniques on one of the edge surfaces of the specimen.…”

“…The IOP Publishing doi:10.1088/1757-899X/1270/1/012020 2 early-reyielding behaviour was observed in the stress-strain curves under TC loading of an ultra-thin (0.1 mm) SUS304 sheet by Verma et al [12]. This study aims at proposing a new method for testing ultra-thin metallic sheets using glued sandwich specimens in the TC test using the equipment in Min et al [13]. The experimental results of the determined flow curves under uniaxial compression (UC) and TC loading are used to calibrate the advanced constitutive model.…”