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

Dates

  • Submission Date2015-11-21
  • Revision Date2014-11-30
  • Acceptance Date2015-01-25
  • Online Date2015-02-08

DOI Reference

10.2298/TSCI141121016J

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