Influences of draw forming process on the crash analysis of a circular cup
The change of a structural part that occurred after forming process can affect crash response. Current industrial practice only utilizes the geometry in crash analysis. This study investigates the effect of forming histories of a circular cup formed by draw forming process in the crash simulation. C...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | en |
| Published: |
Penerbit Universiti Teknikal Malaysia Melaka
2018
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| Subjects: | |
| Online Access: | http://eprints.utem.edu.my/id/eprint/22912/2/rosmiah%20idecon.pdf http://eprints.utem.edu.my/id/eprint/22912/ https://jamt.utem.edu.my/jamt/article/view/4312/3414 |
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| Summary: | The change of a structural part that occurred after forming process can affect crash response. Current industrial practice only utilizes the geometry in crash analysis. This study investigates the effect of forming histories of a circular cup formed by draw forming process in the crash simulation. Crash analysis at an initial velocity of 50km/h was performed using the explicit finite element code Radioss. The Johnson-Cook constitutive material model was used to characterize the material properties of advanced high strength steel DP600. Crash simulations are conducted in two different cases using a geometrical cup model with case 1 no forming history and case 2 all forming histories obtained from forming process. Results from this study indicate that the mechanical response of steel DP600 in a crash differ by 80.7 % for contact force and 5.87% for energy absorption when forming effects were considered. The contact force tends to increase more with displacement in case 2 compared to case 1. The non-uniform thickness and work hardening from forming process do alter significantly the crashworthiness of a structural part in the subsequent crash event. |
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