MATERIAL INFLUENCE ON THE RESPONSE OF IMPACTED BEAMS

Authors

  • MARCÍLIO ALVES
  • J.L. YUB

Keywords:

Abstract

THE DYNAMIC RESPONSE OF ELASTIC-PLASTIC BEAMS IS STUDIED NUMERICALLY USING SEVERAL MATERIAL CONSTITUTIVE MODELS WHICH TAKE INTO ACCOUNT MATERIAL STRAIN HARDENING AND STRAIN-RATE HARDENING. A COMPARISON IS DRAWN BETWEEN THE BEAM RESPONSES OF THESE MORE SOPHISTICATED MODELS AND THE ONES PREDICTED BY A RIGID, PERFECTLY PLASTIC MATERIAL LAW. A METHOD FOR CHOOSING THE MATERIAL PARAMETERS IN THE BILINEAR MODEL IS PROPOSED. THE NUMERICAL SIMULATION SHOWS THE IMPORTANCE OF THE ELASTIC EFFECT WHICH REDUCES THE PLASTIC WORK ABSORPTION AS WELL AS CAUSES PART OF THE PLASTIC WORK TO BE DISSIPATED DURING VIBRATION. THE STUDY REPORTED HERE ALLOWS A BETTER UNDERSTANDING OF THE INFLUENCE OF VARIOUS MATERIAL PARAMETERS ON THE DYNAMIC RESPONSE OF STRUCTURES AND HELPS TO ESTABLISH SOME LIMITS OF VALIDITY FOR THE RIGID, PERFECTLY PLASTIC ANALYSIS.

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Published

2005-06-01

Issue

Vol. 2 No. 2 (2005)

Section

Articles

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