Estudo e desenvolvimento de código computacional para análise de impacto entre estruturas levando em consideração efeitos térmicos / Study and development of computational code to analyze impact in structures considering thermal effects

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

It becomes quite important study the thermal effects when considering impact in structures, because besides the mechanical energy changing into heat, one may consider the changes in the material properties due overheating. In this sense, the main goal of this work is develop a thermodynamic formulation and its implementation, based in the Helmholtz free-energy and in the first and second law of thermodynamics, to analyze structures under impact. The mechanical problem will be solved by a positional finite element application developed in past researches and it can be classified as a total Lagrangean with exact kinematics. In order to consider the impact, the Lagrangean multiplier will be associated to the potential theory of impact prevision, technique geometrically defined and an adapted technique based on the time integration of Newmark, modified to impact problems.

ASSUNTO(S)

positional finite element method termo-plasticidade termo-elasticidade método dos elementos finitos posicional thermo-plasticity thermo-elasticity

ACESSO AO ARTIGO

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