An improved mixed numerical-experimental method for stress field calculation

• Type: Article in International Scientific Journal
• Date: 2007

Authors

H. M. R. Lopes (Author) Other; R.M. Guedes (Author) FEUP; M. A. Vaz (Author) FEUP

Journal

Title: Optics and Laser Technology

Vol. 39 No. 5

Pages: 1066-1073

ISSN: 0030-3992

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 6 Citations

ISI Web of Science

Scopus - 8 Citations

INSPEC

Scientific classification

FOS: Engineering and technology > Mechanical engineering

CORDIS: Technological sciences > Engineering > Materials engineering

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8