동적 구성방정식을 적용한 자동차 차체 구조물의 충돌 특성 분석Crashworthiness of Auto-body Structures with the Dynamic Constitutive model

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The crashworthiness of vehicles with finite element method depends on the geometry modeling and material properties. In order to ensure the impact characteristics of auto-body structures by a finite element method, the dynamic behavior of sheet metals must be examined. In this paper, high strain rate tensile tests have been carried out with a tension type split Hopkinson bar apparatus specially designed for sheet metals. Simulation of auto body structures has been carried out by an elasto-plastic finite element method with explicit time integration. The crashworthiness of auto-body structures analyzed with quasi-static constitutive relation is compared with the one with rate dependent constitutive model. The frontal frames and a square tube used in numerical simulation. The impact characteristics such as the deformed shapes and the impact energy absorption of auto-body structures are investigated with the variation of the strain rate.
Publisher
한국자동차공학회
Issue Date
2000
Keywords

Hopkinson Bar; Crashworthiness; Strain Rate Hardening

Citation

KSME Choong-Chung Conference, pp.1~6

URI
http://hdl.handle.net/10203/17962
Link
http://www.ksae.org/
Appears in Collection
ME-Conference Papers(학술회의논문)
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