A STUDY OF THE THERMAL RUNAWAY PHASE GENERATED DURING CYCLIC LOADING OF VISCOELASTIC MATERIALS ACCOUNTING FOR THE PRESTRESS

Authors

  • LUIZ FERNANDO FERREIRA RODOVALHO FEDERAL UNIVERSITY OF UBERLâNDIA, SCHOOL OF MECHANICAL ENGINEERING
  • ANTONIO MARCOS GONLJALVES DE LIMA FEDERAL UNIVERSITY OF UBERLâNDIA, SCHOOL OF MECHANICAL ENGINEERING
  • ROMES ANTONIO BORGES FEDERAL UNIVERSITY OF GOIáS, DEPARTMENT OF APPLIED MATHEMATICS
  • HELDER BARBIERI LACERDA FEDERAL UNIVERSITY OF UBERLâNDIA, SCHOOL OF MECHANICAL ENGINEERING

Keywords:

PASSIVE VIBRATION CONTROL, VISCOELASTIC DAMPING, THERMOVISCOELASTICITY, THERMAL RUNAWAY, PRESTRESSED.

Abstract

THE GOOD DAMPING PERFORMANCE AND INHERENT STABILITY OF VISCOELASTIC MATERIALS IN RELATIVELY BROAD FREQUENCY BANDS, BESIDES COST EFFECTIVE-NESS, OFFERS MANY POSSIBILITIES FOR PRACTICAL ENGINEERING APPLICATIONS. HOWEVER, FOR VISCOELASTIC DAMPERS SUBJECTED TO DYNAMIC LOADINGS SUPERIMPOSED ON STATIC PRELOADS, ESPECIALLY WHEN GOOD ISOLATION CHA-RACTERISTICS ARE REQUIRED AT HIGH FREQUENCIES, TRADITIONAL DESIGN GUIDELI-NES CAN LEAD TO POOR DESIGNS DUE TO THE RAPIDLY INCREASING RATE OF TEM-PERATURE CHANGE INSIDE THE MATERIAL. THIS PAPER IS DEVOTED TO THE NU-MERICAL AND EXPERIMENTAL INVESTIGATION IN THE DEGRADATION OF THE STIFFNESS AND CAPACITY OF A VISCOELASTIC MATERIAL INDUCED BY THE THERMAL RUNAWAY PHASE, WHEN IT IS SUBJECTED TO DYNAMIC AND STATIC LOADS SIMUL-TANEOUSLY. AFTER THE THEORETICAL BACKGROUND, THE OBTAINED RESULTS IN TERMS OF THE TEMPERATURE EVOLUTIONS AT DIFFERENT POINTS WITHIN THE VOLUME OF THE MATERIAL AND THE HYSTERESIS LOOPS FOR VARIOUS STATIC PRE-LOADS ARE COMPARED AND THE MAIN FEATURES OF THE PROPOSED STUDY ARE HIGHLIGHTED.

Author Biographies

LUIZ FERNANDO FERREIRA RODOVALHO, FEDERAL UNIVERSITY OF UBERLâNDIA, SCHOOL OF MECHANICAL ENGINEERING

PHD STUDENT AT FEDERAL UNVERSITY OF UBERLÂNDIA, SCHOOL OF MECHANICAL ENGINEERING

ANTONIO MARCOS GONLJALVES DE LIMA, FEDERAL UNIVERSITY OF UBERLâNDIA, SCHOOL OF MECHANICAL ENGINEERING

ASSOCIATE PROFESSOR AT FEDERAL UNIVERSITY OF UBERLÂNDIA, SCHOOL OF MECHANICAL ENGINEERING

ROMES ANTONIO BORGES, FEDERAL UNIVERSITY OF GOIáS, DEPARTMENT OF APPLIED MATHEMATICS

ASSOCIATE PROFESSOR AT FEDERAL UNIVERSITY OF GOIÁS, DEPARTMENT OF APPLIED MATHEMATICS

HELDER BARBIERI LACERDA, FEDERAL UNIVERSITY OF UBERLâNDIA, SCHOOL OF MECHANICAL ENGINEERING

FULL PROFESSOR AT FEDERAL UNIVERSITY OF UBERLÂNDIA, SCHOOL OF MECHANICAL ENGINEERING

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Published

2016-11-01

Issue

Vol. 13 No. 15 (2016)

Section

Articles

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