THERMAL SCIENCE

International Scientific Journal

Zhanling Ji

,

Yunhua Li

,

Sujun Dong

,

Peng Zhang

,

Yunze Li

ELASTOPLASTIC FINITE ELEMENT ANALYSIS FOR WET MULTIDISC BRAKE DURING LASTING BRAKING

ABSTRACT
Addressed to serious heat degradation problem of the braking continuously performed in the drag brake application for a long time, finite element analysis for bidirectional thermal-structure coupling is adopted to investigate temperature and stress when material properties are temperature-dependent. Based on the constitutive relations of heat transfer and strain-stress, three-dimensional transient finite element equilibrium equations with many kinds of boundary conditions for bidirectional thermal-structure coupling were derived. And it was originally presented that start time, location, severity and evolution laws of plastic deformation were depicted using dimensionless stress distribution contour with the yield limit related to temperature. The change laws of plastic element number and contact area versus braking time were expressed by plasticity ratio and contact ratio curves, respectively. The laws revealed by the numerical calculation results are in accordance with the objective perception and reasoning.
KEYWORDS
wet multidisc brake, elastic-plastic analysis, bidirectional thermal-structure coupling, lasting braking
PAPER SUBMITTED: 2015-11-21
PAPER REVISED: 2014-11-30
PAPER ACCEPTED: 2015-01-25
PUBLISHED ONLINE: 2015-02-08
DOI REFERENCE: https://doi.org/10.2298/TSCI141121016J
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2015, VOLUME 19, ISSUE Issue 6, PAGES [2205 - 2217]
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Elastoplastic finite element analysis for wet multidisc brake during lasting braking

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