Effect of strain history on simulation of crashworthiness of a vehicle

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2009

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Doğan, Uluğ Çağrı

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In this thesis the sheet metal forming effects such as plastic strain and thickness changes in the crash have been investigated by numerical analysis. The sheet metal forming histories of the components of the load path that absorbs the highest energy during a frontal crash have been considered. To find out the particular load path, the frontal crash analysis of Ford F250 Pickup has been performed at 56 kph into a rigid wall with finite element analysis without considering the forming history. The sheet metal forming simulations have been realized for each structural component building up the particular load path. After forming histories have been acquired, plastic strain and thickness distributions have been transferred to the frontal crash analysis. The frontal crash analysis of Ford F250 Pickup has been repeated by including these to introduce the effect of forming on crash response of the vehicle. The results of the simulations with and without forming effect have been compared with the physical crash test results to evaluate the sheet metal forming effect on the overall crash response. The results showed that with forming history the crash response of the vehicle and deformations of the particular components have been changed and the maximum deceleration pulse transferred to the passenger compartment has decreased. It has seen that a good agreement with physical test results has been achieved.

Subject Keywords

Mechanical engineering.

URI

http://etd.lib.metu.edu.tr/upload/12610725/index.pdf
https://hdl.handle.net/11511/18577

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

U. Ç. Doğan, “Effect of strain history on simulation of crashworthiness of a vehicle,” M.S. - Master of Science, Middle East Technical University, 2009.