자동차 Crash box의 구멍 위치에 따른 정적 압축 해석 및 검증
An Analysis and the Verification of Static Compression due to the Hole Position of Automotive Crash Box
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초록
Separately from a single body, crash box is maufactured into the two alumnae by bonding adhesive. Crashbox has the property to absorb the shock by impact transferred to the car body at the collision between cars. In this study, the structural effect and performance are investigated according to the positions of holes punched at this crash box. The optimal structure is investigated for optimal design data of aluminum crash box. The equivalent stresses of study models distributed by compressive loads are compared with each other by using the analysis program of ANSYS. Total energies and mechanical strengths of study models at the real situation are also analyzed. As analysis results, the maximum equivalent stresses of 40880MPa, 42368MPa, 43176MPa, 44960MPa and 43476MPa are shown at study models due to the hole positions of 10mm, 15mm, 20mm, 25mm and 30mm from the upper plane of crash box respectively. Also, the total energy on analysis are verified within the error range of 10 % by comparing that on experiment at the hole position of 10mm. It is thought that the crash box due to the hole position from the upper plane of crash box can be effectively designed through this study result.
Abstract
Separately from a single body, crash box is maufactured into the two alumnae by bonding adhesive. Crashbox has the property to absorb the shock by impact transferred to the car body at the collision between cars. In this study, the structural effect and performance are investigated according to the positions of holes punched at this crash box. The optimal structure is investigated for optimal design data of aluminum crash box. The equivalent stresses of study models distributed by compressive loads are compared with each other by using the analysis program of ANSYS. Total energies and mechanical strengths of study models at the real situation are also analyzed. As analysis results, the maximum equivalent stresses of 40880MPa, 42368MPa, 43176MPa, 44960MPa and 43476MPa are shown at study models due to the hole positions of 10mm, 15mm, 20mm, 25mm and 30mm from the upper plane of crash box respectively. Also, the total energy on analysis are verified within the error range of 10 % by comparing that on experiment at the hole position of 10mm. It is thought that the crash box due to the hole position from the upper plane of crash box can be effectively designed through this study result.
참고문헌 (6)
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- G. H. Lee, "Study on the Shape of an Aluminum Crash Box with the Finite Element Analysis", Journal of Korean Society of Automotive Engineers, 2, pp.1125~1130 (2006)
- Lorenzo Peroni, "Comparison of the energy absorption capability of crash box assembled by spot-weld and continuous joining techniques", International Journal of Impact Engineering, 36(3), pp.498~511 (2009)
- K. C. Shin, "Axial crash and bending collapse of and aluminum", GFRP hybrid square tube and its energy absorption capability, 2002, pp.57(1-4), 279~287
- 조재웅, "자동차 완충기의 구조해석에 관한 연구", 한국기계기술학회지, 14(2), pp.31~40 (2012), 한국기계기술학회[DOI]
- 김광석, "기계시스템의 정적 평형상태 해석을 위한 수치해석 방안 연구", 한국기계기술학회지, 15(6), pp.973~979 (2013), 한국기계기술학회