DOI QR코드

DOI QR Code

오프로드용 SUV의 프론트 언더커버 형상에 따른 내구성에 대한 융합 연구

Convergence Study on Durability due to the Configuration of Front Under Cover of Off-road SUV

  • 최계광 (공주대학교 금형설계공학과) ;
  • 조재웅 (공주대학교 기계자동차공학부)
  • Choi, Gye-Gwang (Department of Metal Mold Design Engineering, Kongju national University) ;
  • Cho, Jae-Ung (Division of Mechanical & Automotive Engineering, Kongju National University)
  • 투고 : 2019.04.30
  • 심사 : 2019.07.20
  • 발행 : 2019.07.28

초록

본 논문은 오프로드용 SUV 자동차의 프론트 언더커버에 대한 구조해석을 통하여 내구성을 연구하고자 한다. 실제 사용되는 차체 하부 보호용 언더커버의 형상과 비슷한 3종류의 모델들을 해석하여 어떤 모델이 구조적으로 가장 좋은 것인지 고찰하였다. 언더커버의 모델들은 CATIA 프로그램을 통하여 Model A, B, C 3종류로 설계하였고 ANSYS 프로그램을 이용하여 해석을 하였다. 해석 결과들을 통하여 세 모델들 중에서 Model B가 최대 등가 응력이 가장 작고 피로 수명도 길어서 내구성이 가장 좋은 것으로 나타났다. 본 연구결과를 토대로 얻은 언더커버의 내구성 있는 설계데이터를 활용함으로서 실생활에서의 기계나 구조물에 융합하여 그 미적 감각을 나타낼 수 있다.

This paper is to study the durability through structural analysis on the front undercover of SUV car for offroad. It was investigated which model became structurally best by analyzing three kinds of models which are similar to the configuration of undercover for the protection of the part under car body which has been used really. The models of undercover were designed through CATIA program and analyzed by using ANSYS program as three kinds of models A, B and C. Through the analysis results, model B was expressed to have the best durability as model B has the least equivalent stress and the longest fatigue life among three models. As the design data with the durability of undercover obtained on the basis of this study result are utilized, the esthetic sense can be shown by being grafted onto the machine or structure at real life.

키워드

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Fig. 1. Models A, B and C

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Fig. 2. Constraint conditions of seat

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Fig. 3. Total deformation at models

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Fig. 4. Equivalent stress at models

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Fig. 5. Mean stress correction theory

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Fig. 6. Load histories at nonuniform fatigue loads

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Fig. 7. Fatigue lives of models A, B and C

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