Accession Number : ADA189798

Title :   Thermal Runaway Due to Strain-Heading Feedback,

Corporate Author : STATE UNIV OF NEW YORK AT BUFFALO AMHERST DEPT OF MECHANICAL AND AEROSPACE EN GINEERING

Personal Author(s) : Wan, K T ; Cozzarelli, F A ; Inman, D J

PDF Url : ADA189798

Report Date : 28 May 1985

Pagination or Media Count : 27

Abstract : A one-dimensional, dynamic, thermomechanical model, which includes nonlinear inelastic deformation, internal heat generation (strain-heating), temperature dependent material properties, thermal expansion and thermoelastic coupling, is considered for a uniform thin bar subjected to mechanical or thermal disturbances. A nonlinear Maxwell material is examined in this model and special attention is focused on the temperature change. By solving a nonlinear problem, it is found that a thermal instability, called thermal runaway, may result due to the mutual feedback between strain-heating and the temperature dependent inelastic material properties. Neglecting this important phenomenon may lead to unexpected material failure.

Descriptors :   *THERMAL INSTABILITY, *THERMOMECHANICS, *STRAIN(MECHANICS), COUPLING(INTERACTION), DEFORMATION, DYNAMICS, ELASTIC PROPERTIES, FAILURE, FEEDBACK, HEAT, INTERNAL, MATERIALS, MECHANICAL PROPERTIES, MODELS, NONLINEAR ANALYSIS, NONLINEAR SYSTEMS, PRODUCTION, TEMPERATURE, THERMAL EXPANSION, THERMAL PROPERTIES, THINNESS, THERMODYNAMICS, HEATING

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE