Evaluation of Gray Iron Brake Discs for Trucks By Thermal Modeling

Schwartz, H. W.; Hartter, L. L.; Rhee, S. K.; Byers, J. E.

doi:10.4271/751013

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…The MS was received on 29 May 2001 and was accepted after revision on the computer [1]. Blot [2] de ned several numerical for publication on 23 January 2002.…”

Section: Introductionmentioning

confidence: 99%

The development of a material model for cast iron that can be used for brake system analysis

Koetniyom

Brooks

Barton

2002

Proceedings of the Institution of Mechanical Engineers, Part D:

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This paper describes the methodology and reports the results of detailed thermomechanical nite element analyses of cast iron brake discs under repeated high g braking conditions. The thermal analysis allows for heat loss from the vanes in a back-ventilated disc design as well as heat transfer to other parts of the brake assembly. The cast iron material properties required for the non-linear structural analysis are generated by mechanical tests on samples cut from the brake disc. The material model developed by the authors allows for the variation of ow stress with temperature and for the diVerent yield properties of cast iron in tension and compression. The nite element results, derived from a preliminary investigation, indicate regions of high plastic strain accumulation which may lead to disc crazing and/or cracking and enable comparisons to be made between back-and front-vented rotor designs.

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“…The MS was received on 29 May 2001 and was accepted after revision on the computer [1]. Blot [2] de ned several numerical for publication on 23 January 2002.…”

Section: Introductionmentioning

confidence: 99%

The development of a material model for cast iron that can be used for brake system analysis

Koetniyom

Brooks

Barton

2002

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…Dike [6] and Abbas et al [7,8] calculated the temperature rise in non-ventilated discs. Schwartz et al [9] and Schwartz [10] calculated the temperature rise in a ventilated disc. Munkow [11] summarized the disc parameters as follows.…”

Section: Introductionmentioning

confidence: 99%

Heat convection and design of brake discs

Sakamoto

2004

Proceedings of the Institution of Mechanical Engineers, Part F:

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An evaluation method of heat convection from brake discs using analytical and experimental approaches is described. Brake discs may be wheel or axle mounted and either ventilated or solid. The majority of brake discs are the ventilated type because of the cooling effect of the fins. In this study, the cooling efficiency of ventilated discs was investigated through the basic equation for heat convection, brake tests and measurements of the flow volume through the fins.It is concluded that a cooling rate parameter a [¼ (heat convection6convection area)/(specific heat 6 disc mass)] derived from the basic equation for heat convection can express the cooling efficiency of a disc. The parameter a can also be used to estimate the maximum temperature accumulated in a disc after several cycles of braking to a stop. As for the design of the brake discs, the heat convection area is more important than the thickness or number of fins. Also the air velocity through the fins should be taken into consideration.

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