An inverse method applied to the determination of deformation energy distributions in the presence of prehardening stresses

This paper presents an experimental procedure to estimate the deformation energy distribution within plane samples submitted to mechanical loading. This procedure combined a digital image correlation (DIC) technique giving in-plane displacement fields with an identification method that separately pr...

Full description

Saved in:
Bibliographic Details
Published in:Journal of strain analysis for engineering design 2008-11, Vol.43 (8), p.705
Main Authors: Latourte, F, Samida, A, Chrysochoos, A, Pagano, S, Wattrisse, B
Format: Article
Language:English
Subjects:
Behavior
Mechanical properties
Studies
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper presents an experimental procedure to estimate the deformation energy distribution within plane samples submitted to mechanical loading. This procedure combined a digital image correlation (DIC) technique giving in-plane displacement fields with an identification method that separately provided fields of material properties and stress distributions developed during the loading. The method was first applied to simulated data to characterize the capabilities of the image processing. Finite element computations were first performed on a complex structure using a standard linear kinematical hardening model to generate multistage loadings leading to heterogeneous displacements and distributions of deformation energy. Loads and displacements were then used as inputs to check the robustness of the image processing by comparing the identified deformation energy fields with the computed ones. The procedure was then applied to experimental data. Tests were conducted under conditions similar to the numerical tests. The identification of a linear kinematical hardening model gave deformation energy patterns showing a good agreement with the simulated results, even in the presence of residual stresses induced by a prehardening. [PUBLICATION ABSTRACT]
ISSN:0309-3247
2041-3130