Pseudo-inverse method for the identification of non-homogeneous stress field in dynamic experiments

S. Aloui; R. Othman; E. Verron; P. Guégan; A. Poitou

doi:doi:10.1051/dymat/2009062

All issues

Volume 1 (2009)

10.1051/dymat/2009062

Abstract

Issue		DYMAT 2009 Volume 1, 2009 DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading


Page(s)		437 - 442
Section		Experimental Techniques
DOI		https://doi.org/10.1051/dymat/2009062
Published online		15 September 2009

DYMAT 2009 (2009) 437-442
DOI: 10.1051/dymat/2009062

Pseudo-inverse method for the identification of non-homogeneous stress field in dynamic experiments

S. Aloui, R. Othman, E. Verron, P. Guégan and A. Poitou

École Centrale Nantes, Institut de Recherche en Génie Civil et Mécanique, 1 rue de la Noë, BP. 92101, 44321 Nantes Cedex 3, France

Published online: 15 September 2009

Abstract
The conventional recovery of the mean stress field in dynamic tests is not valid in case of non equilibrated-dynamic tests. Inverse techniques are well adapted to resolve this problem. Conversely, they need the resolution of a complex numerical problem. In this paper, an alternative pseudo-inverse method is proposed as solution to the problem of non-homogeneity in dynamic tests. It is based on DIC techniques. The stress-strain relationship is determined and approximated by Neo-Hooke hyper elastic constitutive equation. In order to validate the method, compressive tests were performed on synthetic rubber using servo-hydraulic MTS machine.