• 한국기계가공학회지
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• 제17권3호
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• pp.28-33
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• 2018

The automotive front bumper guard is the most important part of the vehicle for protecting the life of driver when a traffic accident happens. In order to ensure safe driving, this part must possess sufficient strength and durability. This study was carried out with structural and fatigue analyses by designing front bumper guard models. After the lowest value for maximum total deformation and equivalent stress was found through structural analysis and the highest value for fatigue life was found for all three models, it was shown that the type C front bumper guard model was the most suitable for application to a real car. The strength property and durability of the optimum design were determined through this study's results.

• 한국기계가공학회지
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• 제19권8호
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• pp.1-7
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• 2020

In this study, three models on the installation of automotive additional front bumper guard were designed and the structural analysis was carried out. The additional front bumper models B and C appears to be safer on stability instead of the basic front bumper model A. Model A with a simple structure is shown to have the safe region overall except in the area where the load is applied directly. Models B and C are shown to have the shortest lives at the regions where the bumpers are connected with each other. By comparing with the least fatigue lives at models A, B and C, Model B has the longest life with the best durability.

• 자동차안전학회지
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• 제6권2호
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• pp.5-11
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• 2014

Front side member of the front impacted vehicle plays a key role in minimizing the impacting load transferred to the compartment. To perform that required function, axial collapse should be dominant during side member crashing and, prior to designing side member, it is crucial to minimize bending moment occurred at the front end. In this study, for FE model of a SUV front body, front impact analyses were carried to find out bumper stay design which effectively develope axial collapse in the side member. As a previous work, the thickness of side member reinforcement were changed. Next, the inner thickness of bumper stay was increased. Also, the bead shape and location were modified. Final front body model showed much more axial collapsed mode and enhanced crash performance. In addition, a stay of octagon section was adopted and that model exhibited distinctive increase in impact energy absorption.

• 한국융합학회논문지
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• 제10권8호
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• pp.159-164
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• 2019

충격을 완화시키기 위해 봅슬레이의 프론트 범퍼가 장착되지만, 봅슬레이에 대한 공기 저항은 앞에 위치한 몸체의 형태에 따라 달라진다. 본 연구에서는 봅슬레이의 세 가지 형상에 대한 유동 해석을 수행하였으며, 압력을 적게 받게 되는 모델 B, C인 앞이 뾰족한 형태가 앞이 둥근 모델인 모델 A보다 공기 저항을 줄일 수 있고 범퍼 뒤 쪽이 좁아지는 형태가 넓어지는 형보다 좀 더 매끄러운 유동 흐름이 될 수 있다. 본 연구 결과는 봅슬레이에서의 유동 저항을 가장 줄일 수 있는 몸체의 설계를 확보하는 데 기여할 수 있다고 사료된다. 본 연구결과를 토대로 얻은 봅슬레이의 내구성 있는 설계데이터를 활용함으로서 실생활에서의 기계나 구조물에 융합하여 그 미적 감각을 나타낼 수 있다.