• Title, Summary, Keyword: 디스크 브레이크 설계

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A Convergent Investigation on Structural Analysis with Thermal Stress at the Shape of Brake Disk for Racing Car (경주용 자동차 브레이크 디스크 형상에서의 열 응력 및 구조 해석에 관한 융합 연구)

  • Oh, Bum-Suk;Cho, Jae-Ung
    • Journal of the Korea Convergence Society
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    • v.11 no.6
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    • pp.209-213
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    • 2020
  • In this study, the model A with the existing shape used at racing car and the model B with light weight were designed. The structural analysis with thermal deformation and stress were carried out. Model A shows that the maximum temperature is lower than model B. The cooling performance due to the shape of the disk without any other cooling conditions can be shown to be better for model A. Model A was seen to be superior in durability as the thermal stress reduced by almost twice as much as model B. The part where the greatest stress occurred appeared to be the hole jointed with the hub regardless of its shape. The analysis results at this study are seen to be useful at designing the shape of the actual vehicle brake disc. The analysis results obtained in this study can be applied at grasping the strength of the brake disk for racing car practically. By utilizing the analysis result of the brake disk for racing car, this study is seen as the convergence study that the aesthetic design and analysis are applied.

Mechanical Strength Experiment of Carbon/Carbon Composite for Aircraft Brake Disk (탄소/탄소 브레이크 디스크의 기계적 강도 시험에 관한 연구)

  • 유재석;오세희;김천곤;홍창선;윤병일;김광수
    • Composites Research
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    • v.13 no.6
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    • pp.55-62
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    • 2000
  • The strength test was done for the Carbon/Carbon rotor disk which is the critical part of a carbon/carbon brake system in an operating time. The loading fixture was designed for the static strength test of a single carbon/carbon brake disk using finite element analysis. To simulate the real dynamic system in a static condition, the friction surface of the rotor disk was fixed and static load was applied to the rotor slot in the circumferential direction. The described failure mechanism of the brake disk can be described as matrix cracking occurred first at the contact surface of the rotor slot, subsequent delamination from the cracked contact surface, and the final fracture at the notch of the rotor.

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Robust Design of the Back-plate Shape of the Disc Brake Pad for Reduction of Uneven Wear (디스크 브레이크의 편마모 저감을 위한 브레이크 패드의 백플레이트 형상 강건설계)

  • Park, Jin-Tack;Han, Seung-Wook;Choi, Nak-Sam
    • Transactions of the Korean Society of Automotive Engineers
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    • v.22 no.1
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    • pp.8-19
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    • 2014
  • In this paper, a robust design of the back-plate of the brake pad to decrease the uneven wear of the pad was studied. A finite element analysis was performed to analyze the pressure distributions on the contact surfaces. Optimized back-plate shape of the brake pad was determined using the Taguchi method. The effectiveness of the robust design was clarified by the wear tests with a dynamometer.

Robust Design of the Disc Brake Pad Shape for Reduction of Uneven Wear (디스크 브레이크의 편마모 저감을 위한 브레이크 패드의 마찰재 형상 강건설계)

  • Park, Jin-Tack;Choi, Nak-Sam
    • Transactions of the Korean Society of Automotive Engineers
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    • v.20 no.1
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    • pp.77-87
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    • 2012
  • In this paper, the method and its effectiveness to decrease the uneven wear of the brake pad were proposed. A finite element analysis was performed to analyze the pressure distributions on the contact surfaces. The optimum brake pad shape was determined by a robust design using the Taguchi method. The effectiveness of the optimum design was clarified by the wear tests with a dynamometer.

Robust Optimization of Caliper Brake Disc Considering Tolerance (설계변수 및 매개변수의 공차를 고려한 캘리퍼 디스크 브레이크의 강건설계)

  • Kim, Jong-Hun;Park, Jeong-Min;Lee, Jong-Soo
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.27 no.6
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    • pp.905-913
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    • 2003
  • Generally, most of optimization have been performed with fixed sizes and variables. But, the optimum value considering tolerance of design variables and material properties, might be useless owing to exist in infeasible region. It is needed that the tolerance of design variables and material properties is considered for a real design problem. A deterministic optimal solution can be in the feasible region by performing robust optimization considering tolerance. In the paper, robust design is suggested to gain an optimum insensitive to variation of design variables and it is applied for optimization problem of caliper disc brakes for vehicles.

Convergent Analysis through Durability by Thermal Stress at Drum Brake (드럼 브레이크에서의 열응력에 의한 내구성을 통한 융합적 분석)

  • Oh, Bum-Suk;Cho, Jae-Ung
    • Journal of the Korea Convergence Society
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    • v.11 no.5
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    • pp.139-144
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    • 2020
  • In this study, a simulation analysis on the drum itself and the brake was examined. And the analysis results were obtained by investigating the thermal analysis results and the durability through structural analysis. Through the thermal stress and structural analyses on the lining under the force due to the brake cylinder, the drum inside under the force due to the expansion of the lining and the drum under the force due to the rotation of the axis, it was confirmed at which part the amounts of equivalent stress and deformation became large. If applied to the brake disc design by combining the results of this study, it is considered to be large utilization at increasing the prevention against the thermal deformation and its durability. The results of this study can be usefully applied to the durability design that can withstand the thermal stress in the drum brake. By applying the durability analysis at the seam of railroad track by season, this investigation result is seen to be favorable as the convergent research applied to the aesthetic design.

A Study on the Cross-drilling Effects of Brake Disc Rotor (브레이크 디스크 로터 표면 수직 구멍의 영향에 관한 연구)

  • Seo, Young-Jin;Oh, Je-Ha;Lee, Jun-Sang;Kang, Kyoung-Soo;Jung, Geun-Sung
    • Transactions of the Korean Society of Automotive Engineers
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    • v.16 no.1
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    • pp.100-105
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    • 2008
  • Cross-drilling on the brake disc is generally known as a way of improving cooling efficiency. In other theories, cross-drilled holes act like a path of gas or water and are also known that they can reduce fading and wetting of brake rotors. However, in disc rotors with cross-drilling, thermal crack phenomena have been reported more frequently and more manufacturing cost should be paid than non cross-drilled disc rotors. In this study, to examine various effects of cross-drilling on the brake disc, two kinds of brake disc rotors, cross-drilled and non cross-drilled, were used in computational fluid dynamic analyses and dynamometer tests.

Structural Design of a Circumferential Friction Disc-brake, Considering Thermoelastic Instability (열탄성 불안정성을 고려한 원주면 마찰형 디스크 브레이크의 구조설계)

  • Song, Byoung-Cheol;Kang, Dong-Heon;Kim, Young-Hee;Park, Young-Chul;Lee, Kwon-Hee
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.6 no.3
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    • pp.38-46
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    • 2007
  • Weight reduction for an automobile component has been sought to achieve fuel efficiency and energy conservation. In response to this trend, a new disc-brake called the circumferential friction disc-brake is suggested. This paper compares the mechanical performances of a conventional disc-brake and a suggested disc-brake, under the dynamic braking condition. The thermoelastic instability is considered to simulate the test condition. Furthermore, the metamodel using kriging interpolation method is introduced to obtain the optimum design of a suggested circumferential friction disc-brake. The design results obtained by the kriging method are compared with those obtained by the ANSYS.

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Development of Smart-phone based Thermal Imaging Diagnostic System for Monitoring Disc Pads of Crane (크레인 디스크 패드 모니터링을 위한 스마트폰 기반의 열영상 진단 시스템 개발)

  • Oh, Yeon-Jae;Park, Kyoung-Wook;Kim, Eung-Kon
    • The Journal of the Korea institute of electronic communication sciences
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    • v.9 no.12
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    • pp.1397-1404
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    • 2014
  • Grab cranes are used for multi-purpose when the sand and soil are deposited into harbor wharf or the undersea construction is performed. Among the components of crane grab, the wire drum and disc brake pad are key expendables and have disadvantages that lot of heat is generated and very expensive when replacing them. In this study, the thermal image analysis for the disc brake, which works with wire drum of the crane is suggested. The suggested system performs the pad thermal diagnosis through the thermal image using the characteristics that the disc and pad surface temperatures are distributed abnormally before the brake failure and the disc pad damage. Therefore, the damage by the failure can be prevented by discovering the abnormality of the machine parts before failure and the life cycle of the pad and the cost can be extended and saved by operating the crane performing constant checkup for the overload.

A Study of Effects of Ferritic Nitrocarburized Brake Disc on Its Corrosion Resistance and Braking Performances (브레이크 디스크의 산질화처리가 부식지연 및 제동특성에 미치는 영향에 관한 연구)

  • Han, Jin;Kim, Gwang Yun;Lee, Hack Ean;Lee, JeongJoo
    • Journal of Auto-vehicle Safety Association
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    • v.7 no.2
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    • pp.19-24
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    • 2015
  • Ferritic Nitro Carburizing (FNC) cast iron brake discs is known to improve corrosion resistance and brake creep groan noise as well as prevent corrosion-induced pulsation. But, it is necessary to treat honing machining on braking surface to avoid grinding noise during braking.