An improved mixed numerical-experimental method for stress field calculation

• Tipo: Artigo em Revista Científica Internacional
• Data: 2007

Autores

H. M. R. Lopes (Autor) Outra; R.M. Guedes (Autor) FEUP; M. A. Vaz (Autor) FEUP

Revista

Título: Optics and Laser Technology

Vol. 39 Nº 5

Páginas: 1066-1073

ISSN: 0030-3992

Editora: Elsevier

Indexação

ISI Web of Knowledge - 6 Citações

ISI Web of Science

Scopus - 8 Citações

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia mecânica

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia de materiais

Outras Informações

ID Authenticus: P-004-971

DOI: 10.1016/j.optlastec.2006.04.006

Abstract (EN): In this work a numerical-experimental method is used to study the dynamic behavior of an aluminum plate subjected to a small mass impact. The out-of-plane displacements, due to transient bending wave propagation, were assessed for successive time instants, using double pulse TV-holography, also known as pulsed ESPI. The experimental setup and the image processing methods were improved to allow the calculation of the plate transient stress field. Integral transforms are used to obtain the strain fields from spatial derivatives of displacements noisy data. A numerical simulation of the plate transient response was carried out with FEM Ansys (R). For this purpose a PZT transducer was used to record the impact force history, which was inputted in the numerical model. Finally, the comparisons between numerical and experimental results are presented in order to validate the present methodology.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8