Elastic-Plastic Stress Waves in Ductile-Hardening Materials using Finite Element Techniques and a Split Hopkinson Pressure Bar

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2004

Autores

Francisco Queirós Melo (Autor) FEUP; Fernando Ferreira (Autor) Outra; Mário Vaz (Autor) FEUP; Joaquim F. Silva Gomes (Autor) FEUP

Ata de Conferência Internacional

Título: Proceedings of International Conference on Computational and Experimental Engineering & Sciences

Páginas: 2165-2170

International Conference on Computational and Experimental Engineering & Sciences

Funchal, 26-29 July 2004

Classificação Científica

FOS: Ciências da engenharia e tecnologias

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia mecânica

Outras Informações

Abstract (EN): High strain rates in metallic materials are present in some engineering applications and designs subjected to sharply variable forces. In such situations, the load intensity may determine a stress state in excess to limit values. In non-linear analysis a constitutive material model is used as a simple approach an equivalent post-yield Young modulus. A simple and straightforward numerical model, based on finite element techniques was developed. The constitutive model deals with a smooth high order function to approach the evolution of the material behaviour. The numerical data was compared with the corresponding one from experimental tests carried out in a Split Hopkinson Pressure Bar (SHPB), an important experimental research tool in the assessment of the deformation rate of materials submitted to high speed impact loads. The main objective of this work was to simulate the wave propagation phenomena in the understanding of the experimental data.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6