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A Study on the Finite Element Analysis of springback characteristics according to stamping process conditions of UHSS with UTS of 1.2GPa  

Jang, Hyun-Min (Department of Mold & Die Engineering, kongju National University)
Choi, Kye-Kwang (Department of Mold & Die Engineering, kongju National University)
Publication Information
Design & Manufacturing / v.12, no.2, 2018 , pp. 34-39 More about this Journal
Abstract
The biggest topics in the automobile industry are light weightening and fuel efficiency improvement. There's a lot of research going on. It is focused on light weight materials. Light weight material is seen as the best way to reduce fuel consumption and to solve the problem of environmental pollution and resource depletion. For the light weight materials, new materials such as aluminum, magnesium, and carbon-hardening materials can be found. Research on the joining techniques of dual materials, improvement of material properties by improving the method of manufacture of existing materials, and studies on ultra-high strength steel sheets are expected to take up the most weight in lightweight materials. As the strength of the ultra-high strength steel sheets increases during forming, it is difficult to obtain dimensional precision due to the increase in elastic restoring force compared to mild or high strength steel sheets. Spring back is known to be affected by a number of factors due to poor plastic molding, and can be divided into the effects of the material spraying and the process. The study on the plasticitic variables were studied as plasticitic factors that can be controlled by a part company. Tensile testing of ultra-high strength materials was conducted to derive properties for plasticitic analysis and to analyze spring back with two factors controlling the height of the bead and blank holding force by adding tensile force and controlling the flow rate.
Keywords
Cold-stamping; Finite element analysis; Spring back; Ultra high strength steel;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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