Analysis of hot forming of a sheet metal component made of advanced high strength steel

2013 ◽  
Author(s):  
Sinem Demirkaya ◽  
Haluk Darendeliler ◽  
Mustafa İlhan Gökler ◽  
Murat Ayhaner
Keyword(s):  
Sheet Metal ◽  
High Strength Steel ◽  
High Strength ◽  
Hot Forming ◽  
Advanced High Strength Steel ◽  
Metal Component ◽  
Sheet Metal Component

Prediction on Die Structure Performance During Advanced High-Strength Steel Sheet Metal Stamping With Non-Rigid Tooling Definition

2011 ◽  
Author(s):  
Dong-kai Xu ◽  
Jun Chen ◽  
Xi-feng Li ◽  
Yu-cheng Tang ◽  
Gui-bao Zhang
Keyword(s):  
Sheet Metal ◽  
High Strength Steel ◽  
High Strength ◽  
Structure Design ◽  
Die Design ◽  
Advanced High Strength Steel ◽  
Mapping Algorithm ◽  
Stamping Die ◽  
Drawing Die ◽  
Die Structure

Die structure behavior and its stability are playing more important roles in stamping of advanced high-strength steel (AHSS) sheet metals since the die structure has to maintain steady forming conditions when larger forming load is generated and applied on the die components. Before the workshop try-out, the virtual testing tool is necessary to assure the stamping die design safety. In this paper, a reliable and efficient method to forecast the die structure performance using an updated load mapping algorithm was proposed to verify the stamping die structure design. Furthermore, an improved method for sheet metal forming modeling with non-rigid tooling definition was also presented to enhance the prediction accuracy. In order to validate the proposed method, a step-shaped-bottom cup drawing die was developed and a data collection system was also adopted to measure the strain/stress evolution at specified locations and to reveal the phenomenon of tooling deflection during the AHSS sheet metal drawing process. The comparison between experimental results and prediction demonstrated very good correlation, and the revised method is more accurate and efficient and is expected to be used to verify the industrial AHSS stamping die designs and support the further research on die structure optimization.

Finite Element Analysis of Reinforcement Rocker Part Made from JAC780Y Steel Sheets

2021 ◽  
Vol 877 ◽  
pp. 83-89
Author(s):  
Aeksuwat Nakwattanaset ◽  
Surasak Suranuntchai
Keyword(s):  
Finite Element ◽  
Sheet Metal ◽  
High Strength Steel ◽  
High Strength ◽  
Material Model ◽  
Advanced High Strength Steel ◽  
Forming Process ◽  
Element Analysis ◽  
Steel Sheets ◽  
Springback Prediction

The manufacturing industries for automotive parts aim to develop technologies for reducing vehicle weight in order to decrease fuel consumption. However, passive safety function for drivers and passengers must not be impaired or should be even improved. Therefore, advanced high strength steel sheet plays more and more important role in designing automotive components. Nowadays, prediction of formability for sheet metal stamping has high capability more than the past. The major challenge is springback prediction. Moreover, it assists in the tooling design to correctly compensate for springback. Especially in automotive production, springback effects have been generally exhibited distinct after forming process of the high strength steel sheets. The springback effect occurred in the deformed state of metal parts must be taken into account by designing any sheet metal panels. Then, the purpose of the present research is to investigate the springback phenomenon of an automotive part named Reinforcement Rocker RL made from an advanced high strength steel grade JAC780Y, after stamping. In addition, the tools design has been carried out. Finite Element (FE) program known as DYNAFORM (based on LS-DYNA solver), has been applied to analyze and improve the springback effect on such forming part. An anisotropic material model according to type 36 (MAT_036 3-PARAMETER_BARAT) was applied. The results obtained from simulations were compared with required parts in each section. Then, the die surface from compensation in 2nd step forming was modified to use. Finally, the simulation part was verified with the real stamping part. It was found that the finite element simulation showed high capability for prediction and compensation of springback in high strength steel sheets forming.

A Contrastive Analysis of the Crashworthiness between 22MnB5 and DP590 Front Bumper Inner Plates

2012 ◽  
Vol 538-541 ◽  
pp. 959-964
Author(s):  
Yi Ming Zhao ◽  
Hong Xie ◽  
Jian Ping Lin
Keyword(s):  
High Strength Steel ◽  
Collision Energy ◽  
High Strength ◽  
Hot Forming ◽  
Passive Safety ◽  
Contrastive Analysis ◽  
Advanced High Strength Steel ◽  
Front Side ◽  
Maximum Displacement ◽  
Absorption Section

The front bumper inner plate was researched based on contrastive analysis of the crashworthiness considering using 22MnB5, a typical hot forming AHSS (Advanced High Strength Steel) and DP590, a kind of general high strength steel. In this paper, we contrasted energy absorption, section force, and maximum displacement of the two different front bumper systems in low-speed collision. The analysis shows the front bumper inner plate using hot forming AHSS can improve the crashworthiness of automobiles and make it more balanced and reasonable to transfer collision energy and force. As a result, the maximum displacement of the front bumper system decreases and other parts such as front side rails can be safer. Thus, using hot forming AHSS in designing a front bumper inner plate can improve the passive safety of automobiles.

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