Date of Award

1-1-2015

Document Type

Masters Thesis

Degree Name

M.S.

Organizational Unit

Daniel Felix Ritchie School of Engineering and Computer Science, Mechanical and Materials Engineering

First Advisor

Yun-Bo Yi, Ph.D.

Second Advisor

Xin Fan

Third Advisor

Ali Azadani

Keywords

Brake discs, Clutch discs, Finite element method, Friction layer, Temperature distribution, Thermal buckling

Abstract

Thermal buckling behavior of automotive clutch and brake discs is studied by making the use of finite element method. It is found that the temperature distribution along the radius and the thickness affects the critical buckling load considerably. The results indicate that a monotonic temperature profile leads to a coning mode with the highest temperature located at the inner radius. Whereas a temperature profile with the maximum temperature located in the middle leads to a dominant non-axisymmetric buckling mode, which results in a much higher buckling temperature. A periodic variation of temperature cannot lead to buckling. The temperature along the thickness can be simplified by the mean temperature method in the single material model. The thermal buckling analysis of friction discs with friction material layer, cone angle geometry and fixed teeth boundary conditions are also studied in detail. The angular geometry and the fixed teeth can improve the buckling temperature significantly. Young’s Modulus has no effect when single material is applied in the free or restricted conditions. Several equations are derived to validate the result. Young’s modulus ratio is a useful factor when the clutch has several material layers. The research findings from this paper are useful for automotive clutch and brake discs design against structural instability induced by thermal buckling.

Publication Statement

Copyright is held by the author. User is responsible for all copyright compliance.

Rights Holder

Huizhou Yang

Provenance

Received from ProQuest

File Format

application/pdf

Language

en

File Size

108 p.

Discipline

Mechanical Engineering

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