Abstract
Lightweight and safe are the key research directions of the automobile industry. Bump beam is an important part of the car safety protection and it’s lightweight design has drawn much attention. In this paper, the static strength and the low-speed impact performances of two types of bump beam with the same structure, which made of carbon fiber reinforced plastics (CFRP) and high strength steel (HSS), were investigated. Under the condition of static press, frontal and 40% offset impact, part structural stiffness, component crush intrusion, energy absorption were comparison analyzed. In order to guide the product design, the deformation and failure of CFRP beams with five different laminate structures were simulated under frontal and 40% offset impact. The results indicate that, with the same structure, the properties of CFRP bump beam are generally superior to HSS product, more conducive to lightweight and the optimum design of the laminate is [0° / 60° / 120°]
Highlights
Body lightweight and safety is an important aspect of automotive technology [1]
The results show that, for satisfying the requirements of the crashworthiness performance, lightweight effect is more obvious when use Composites; Dong-Kyou Park and Zhang Jing wen etc[6,7] established a numerical analysis model to analyze the performance of high strength steel (HSS) bump beam; Sun Huiwei etc[8] conducted simulation analysis to the structure of the bump beam, put forward a structural improvement program to optimize the product performance; Hong Qiucai etc [9]with the acceleration wave form,front bulkhead intrusion and the deformation pattern of front side rail as the development objective of structure, the optimization design of bump beam and body parts is carried out
The point of the 6 degrees of freedom all constraints (as shown in Fig. 1 (a))and using the same constraints and loads for static analysis of two types of bump beams,which made of high strength steel and carbon fiber composite
Summary
Body lightweight and safety is an important aspect of automotive technology [1]. Bump beam is one of the main crash safety structures in the front of the car, and its lightweight technology has drawn wide attention [2]. M.M. Davoodi Ramin Hosseinzadeh and Zhang Haiyang etc[3,4,5] studied the structural design and composite design of lightweight bump beam. The results show that, for satisfying the requirements of the crashworthiness performance, lightweight effect is more obvious when use Composites; Dong-Kyou Park and Zhang Jing wen etc[6,7] established a numerical analysis model to analyze the performance of HSS bump beam; Sun Huiwei etc[8] conducted simulation analysis to the structure of the bump beam, put forward a structural improvement program to optimize the product performance; Hong Qiucai etc [9]with the acceleration wave form,front bulkhead intrusion and the deformation pattern of front side rail as the development objective of structure, the optimization design of bump beam and body parts is carried out.
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