• Title/Summary/Keyword: Automotive Chassis Parts

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A Study on Durability Performance Estimation for Development of Chassis Corner Module (샤시코너모듈 개발을 위한 부품의 내구 성능 예측에 대한 연구)

  • Choi Sungjin;Park Jungwon;Jeon Kwangki;Yoo Youngmyun;Choi Gyoojae;Park Taewon
    • Transactions of the Korean Society of Automotive Engineers
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    • v.14 no.1
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    • pp.159-166
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    • 2006
  • Chassis system has a large influence on ride quality, stability and NVH performance of a car. To improve the performance and reduce cost, the development of chassis modular assemblies is emphasized. To develop chassis corner modules, it is necessary to predict the performance of full vehicle motion such as ride, handling performance, NVH characteristics and durability of modules. In this paper, full vehicle test is performed to acquire the road load data of chassis corner module of passenger car. 3-axis simulator modeling are carried out to simulate reaction force analysis and fatigue analysis of new developed modules. Also, real simulator tests to validate performance of new developed modules are performed. We had developed the accelerated durability test procedure of KATECH PG and it is used to test chassis corner modules at laboratory and simulate durability performance. All these results have been provided to module and parts company and make an important role to develop chassis corner modules.

Development of Chassis Parts Using High Toughness Micro-alloyed Steel (고인성 비조질강 샤시부품 개발)

  • Lee, Si-Yup;Kim, Hyuk
    • Transactions of the Korean Society of Automotive Engineers
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    • v.20 no.3
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    • pp.1-6
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    • 2012
  • This paper developed the chassis part as micro-alloyed steel with high toughness. The performance of micro-alloy steels are superior to similar heat treated steels. The strengthening effects of vanadium make micro-alloyed steels particularly suited for high-strength-steel applications. The disadvantages are that ductility and toughness are not as good as quenched and tempered (Q&T) steels. Precipitation hardening increases strength but may contribute to brittleness. Toughness can be improved by reducing carbon content and titanium additions. dispersed titanium nitrides (TiN) formed by titanium additions effectively prevents grain coarsening. Grain refinement increases strength but also improves toughness. For the chassis parts using high toughness micro-alloy steel, it had proven superior to a plain steel forging by static strength test and endurance test.

Application Technology of high strength hot-rolled steels for automotive lightweight chassis parts (고강도 열연강판의 경량 자동차 샤시부품 개발)

  • Kim J. C.;Kwon T. W.;Jeon J. H.;Son K. S.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2005.10a
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    • pp.43-45
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    • 2005
  • For application of advanced high strength hot-rolled steels (i.e. DP590, DP780) to automotive lightweight chassis parts, various technologies from design to forming test, optimization of welding condition and investigation of coating properties were tried. The target part of this study was automotive rear sub frame and we could make $16.8\%$ weight reduction by reducing the material thickness and optimizing the design. In addition, the formability and weldability of the newly developed AHSS, DP780, were evaluated.

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Development of Automotive Chassis Parts Using the Hydroforming Technology (하이드로포밍 기술을 이용한 자동차 샤시 부품 개발)

  • Lee D. H.;Suh C. H.;Lee W. S.;Park B. C.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2001.10a
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    • pp.354-357
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    • 2001
  • In the present study, front lower arm and engine cradle which are automotive chassis parts were developed using the hydroforming technology. For systematic establishment of parts development process, material properties of tube were reflected at the start of design and problems of initial design drawing were solved by forming analysis. Design and manufacturing technology of hydroforming die were established and the relationship between internal pressure and feeding stroke was studied during try-out. Durability and buckling strength of hydrofromed parts were estimated.

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Safety Evaluate of Brackets for Bare Chassis of a 30-seated Bus

  • Choi, Wan-Mug
    • International journal of advanced smart convergence
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    • v.11 no.3
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    • pp.215-221
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    • 2022
  • In the manufacturing process of the bus treated as the commercial vehicle, after making the bare chassis which is the basic frame of the vehicle body, the part in which passengers ride is connected. In addition, the necessary parts such as the engine and transmission required for the operation of the bus are connected to the bare chassis. The element connecting the parts such as the boarding part of the passengers, the engine, the suspension and the transmission is the bracket. The device required for driving and operating the vehicle is mounted on the bare chassis using the bracket, which should ensure stability during bus operation. In this study, we were performed stress analysis to evaluate the stability of three types of brackets connecting the bare chassis of a new type of 30-seater bus in the development process and components required for driving and operation. The stress analysis should be preceded by the analysis of boundary conditions considering the loads applied to the brackets according to the material of the bracket to be analyzed and the driving type of the bus. The finite element model for structural analysis of brackets according to the driving type of the bus was used by Altair's Hypermesh 2017, and the solver used for structural analysis was Altair's Optistruct. The stress analysis was performed to present the safe and vulnerable parts of the three brackets.

Dynamic analysis of a launcher under impulsive forces (충격력을 받는 발사대의 동역학적 해석)

  • 이병훈;유완석;김준호
    • Journal of the korean Society of Automotive Engineers
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    • v.15 no.2
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    • pp.84-91
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    • 1993
  • The dynamic behaviors of a launcher under impulsive forces are analyzed. All the components of the system, ie ; chassis, turret, cage and suspension parts, are modeled as rigid. The dynamic analysis code, which is developed with the formulae describing the system equations of motion in terms of relative quantities, is used to carry out the analysis. The results show the dynamic responses of chassis and cage when the driving constraints are imposed on turret and cage.

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Development of Durability Enhancement Technology for Arc Weldings in Advanced High Strength Steel (AHSS) Chassis Parts (고장력강판 적용 샤시부품의 용접부 내구수명 향상기술 개발)

  • Lee, Kwang Bok;Oh, Seung Taik
    • Journal of Welding and Joining
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    • v.33 no.4
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    • pp.50-56
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    • 2015
  • In general, discontinuity of metallurgical and structural points of weld zone could decline the fatigue strength. For the lightweight trend, the AHSS application in automotive chassis is in-progress. However, there are few research reports on AHSS welds fatigue strength in especially automotive chassis parts. Therefore, in this study, we evaluated the effects of the factors affecting the AHSS welding fatigue strength. As the result, the stress concentration of weld bead is the most important factor for welding fatigue strength. For the enhancement of welding fatigue strength, we focused on reducing the stress concentration of the welding beads. So, we applied and proved the plasma welding process and GTAW (Gas Tungsten Arc Welding) dressing method. It was verified by uniaxial fatigue specimen, fatigue performance increased from 40 to 60% by applying TIG dressing method compared to the conventional GMAW (Gas Metal Arc Welding). These results could be recommended the enhancement of fatigue performance of AHSS.

Development of rear chassis part using tube forming process (튜브포밍공법을 이용한 후륜 현가부품의 개발)

  • Park B. C.;Kwon T. W.;Lee D. H.;Suh C. H.;Kim J. C.;Kim T. J.;Lee W. S.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2004.10a
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    • pp.32-35
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    • 2004
  • The development of automotive rear chassis part using tube forming process has advantage of increase in part durability and decrease in its weight. We developed tubular type rear CTBA(Coupled Torsion Beam Axle) part with 60K high strength steel developed by POSCO in this project. The result was demonstrated that tubular type CTBA shows excellent durability performance and $10\%$ weight reduction compared with V-beam type CTBA in our work. Furthermore, we will adapt this technology to mass production and apply to the other chassis parts.

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