The Springback Prediction of Deep - Drawing Quality Steel used in V - Bending Process

Three-dimensional finite element-based numerical analysis of Vickers indenter hardness test was conducted to investigate the effect of frictional conditions and material anisotropy on indentation results of deep drawing quality steel sheets. The strain hardening properties and Lankford’s coefficient were determined through the uniaxial tensile tests. The numerical computations were carried out using ABAQUS nonlinear finite element (FE) analysis software. Numerical simulations taken into account anisotropy of material described by Hill (1948) yield a criterion. The stress and strain distributions and loading–unloading characteristics were considered to study the response of the material. It was found that the hardness values seemed to be influenced by the value of the friction coefficient due to the pile-up phenomenon observed. The increasing of the friction coefficient led to a decrease of the pile-up value. Moreover, the width of the pile-ups differed from each other in the two perpendicular directions of measurement. Frictional conditions did not significantly affect the maximum force and the character of load–displacement curves. Frictional regime between the indenter and workpiece caused that the region of maximum residual stresses to be located in the subsurface.

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Springback prediction and optimization of variable stretch force trajectory in three-dimensional stretch bending process

Chinese Journal of Mechanical Engineering ◽

10.3901/cjme.2015.0723.100 ◽

2015 ◽

Vol 28 (6) ◽

pp. 1132-1140 ◽

Cited By ~ 7

Author(s):

Fei Teng ◽

Wanxi Zhang ◽

Jicai Liang ◽

Song Gao

Keyword(s):

Three Dimensional ◽

Stretch Bending ◽

Bending Process ◽

Springback Prediction

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Investigation of Springback Prediction for an Aluminum 7000 Sheet Subjected to Press Forming

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.889.203 ◽

2019 ◽

Vol 889 ◽

pp. 203-210

Author(s):

Quoc Tuan Pham ◽

Jung Han Song ◽

Joong Cheul Park ◽

Young Suk Kim

Keyword(s):

High Strength ◽

Material Behavior ◽

Material Anisotropy ◽

Aerospace Applications ◽

Excellent Corrosion Resistance ◽

Press Forming ◽

Bending Process ◽

Automotive Part ◽

Springback Prediction ◽

Abaqus Software

Aluminum 7000 series have been widely used in the aircraft and aerospace applications owing to its advantages of lightweight, high strength, and excellent corrosion resistance. Recently, the sheets have been applied in the automotive engineering in order to reduce the weight of commercial cars. For this demand, press forming is a common forming method used to produce a designed automotive part. However, springback is one of the main reasons to limit applications of the aluminum 7000 series. This study develops several material models that consider important material behavior including Young's modulus, Bauchinger's effect, and material anisotropy on springback prediction for the tested material. These models have been implemented in ABAQUS software to analysis a bending process and estimate springback amount. As a result, the effects of each material behavior on springback were clarified. Based on simulation results, it is found that correctly capturing the Bauchinger's effect is the major key to the success of springback prediction for such kind of material.

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