Non-parametric identification of the non-homogeneous stress in high strain-rate uni-axial experiments

Souheila Aloui, Ramzi Othman, Arnaud Poitou, Pierrick Guégan, Sami El-Borgi

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Stress and strain homogeneity, in tested samples, is a crucial assumption during a dynamic test. Whenever this assumption is true, the conventional recovery of the mean strain and stress is valid. However, when the stress and strain fields in the sample are not homogeneous, more sophisticated treatment must be considered. Inverse problem techniques are then proposed. Nevertheless, they may yield a non-physical result. In this paper, a non-parametric solution to the problem of non-homogeneity in dynamic tests is presented. The stress field is deduced from the displacement field measured via a Digital Speckle Photography (DSP) technique and a force boundary condition.

Original languageEnglish
Pages (from-to)392-397
Number of pages6
JournalMechanics Research Communications
Volume35
Issue number6
DOIs
Publication statusPublished - Sep 2008
Externally publishedYes

Fingerprint

dynamic tests
stress distribution
strain rate
Strain rate
photography
homogeneity
inhomogeneity
Experiments
recovery
boundary conditions
Photography
Speckle
Inverse problems
Boundary conditions
Recovery

Keywords

  • Digital Speckle Photography
  • Dynamic equilibrium
  • High strain-rate
  • Hopkinson bar
  • Soft materials

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Non-parametric identification of the non-homogeneous stress in high strain-rate uni-axial experiments. / Aloui, Souheila; Othman, Ramzi; Poitou, Arnaud; Guégan, Pierrick; El-Borgi, Sami.

In: Mechanics Research Communications, Vol. 35, No. 6, 09.2008, p. 392-397.

Research output: Contribution to journalArticle

Aloui, Souheila ; Othman, Ramzi ; Poitou, Arnaud ; Guégan, Pierrick ; El-Borgi, Sami. / Non-parametric identification of the non-homogeneous stress in high strain-rate uni-axial experiments. In: Mechanics Research Communications. 2008 ; Vol. 35, No. 6. pp. 392-397.
@article{898d64449bf3454b8f5c1e35b434ea77,
title = "Non-parametric identification of the non-homogeneous stress in high strain-rate uni-axial experiments",
abstract = "Stress and strain homogeneity, in tested samples, is a crucial assumption during a dynamic test. Whenever this assumption is true, the conventional recovery of the mean strain and stress is valid. However, when the stress and strain fields in the sample are not homogeneous, more sophisticated treatment must be considered. Inverse problem techniques are then proposed. Nevertheless, they may yield a non-physical result. In this paper, a non-parametric solution to the problem of non-homogeneity in dynamic tests is presented. The stress field is deduced from the displacement field measured via a Digital Speckle Photography (DSP) technique and a force boundary condition.",
keywords = "Digital Speckle Photography, Dynamic equilibrium, High strain-rate, Hopkinson bar, Soft materials",
author = "Souheila Aloui and Ramzi Othman and Arnaud Poitou and Pierrick Gu{\'e}gan and Sami El-Borgi",
year = "2008",
month = "9",
doi = "10.1016/j.mechrescom.2008.04.005",
language = "English",
volume = "35",
pages = "392--397",
journal = "Mechanics Research Communications",
issn = "0093-6413",
publisher = "Elsevier Limited",
number = "6",

}

TY - JOUR

T1 - Non-parametric identification of the non-homogeneous stress in high strain-rate uni-axial experiments

AU - Aloui, Souheila

AU - Othman, Ramzi

AU - Poitou, Arnaud

AU - Guégan, Pierrick

AU - El-Borgi, Sami

PY - 2008/9

Y1 - 2008/9

N2 - Stress and strain homogeneity, in tested samples, is a crucial assumption during a dynamic test. Whenever this assumption is true, the conventional recovery of the mean strain and stress is valid. However, when the stress and strain fields in the sample are not homogeneous, more sophisticated treatment must be considered. Inverse problem techniques are then proposed. Nevertheless, they may yield a non-physical result. In this paper, a non-parametric solution to the problem of non-homogeneity in dynamic tests is presented. The stress field is deduced from the displacement field measured via a Digital Speckle Photography (DSP) technique and a force boundary condition.

AB - Stress and strain homogeneity, in tested samples, is a crucial assumption during a dynamic test. Whenever this assumption is true, the conventional recovery of the mean strain and stress is valid. However, when the stress and strain fields in the sample are not homogeneous, more sophisticated treatment must be considered. Inverse problem techniques are then proposed. Nevertheless, they may yield a non-physical result. In this paper, a non-parametric solution to the problem of non-homogeneity in dynamic tests is presented. The stress field is deduced from the displacement field measured via a Digital Speckle Photography (DSP) technique and a force boundary condition.

KW - Digital Speckle Photography

KW - Dynamic equilibrium

KW - High strain-rate

KW - Hopkinson bar

KW - Soft materials

UR - http://www.scopus.com/inward/record.url?scp=46349108178&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=46349108178&partnerID=8YFLogxK

U2 - 10.1016/j.mechrescom.2008.04.005

DO - 10.1016/j.mechrescom.2008.04.005

M3 - Article

AN - SCOPUS:46349108178

VL - 35

SP - 392

EP - 397

JO - Mechanics Research Communications

JF - Mechanics Research Communications

SN - 0093-6413

IS - 6

ER -