Feasibility on accurate measurement of non-uniform strain field through contact methods

When straight material filaments do not remain straight after deformation, the strain varies spatially. These spatially varying strain fields arise because of (1) non-uniform distribution of boundary traction, (2) presence of residual stress in the reference configuration, (3) the body being inhomog...

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Autores principales:	Pratyush Kumar, U. Saravanan
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Contact measurements Non-uniform strain Measurement error Probabilistic estimate Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/f2cf4e3f36284899a0aeb2919dff9507
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id	oai:doaj.org-article:f2cf4e3f36284899a0aeb2919dff9507
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spelling	oai:doaj.org-article:f2cf4e3f36284899a0aeb2919dff95072021-12-01T05:06:11ZFeasibility on accurate measurement of non-uniform strain field through contact methods2666-496810.1016/j.apples.2021.100051https://doaj.org/article/f2cf4e3f36284899a0aeb2919dff95072021-09-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666496821000170https://doaj.org/toc/2666-4968When straight material filaments do not remain straight after deformation, the strain varies spatially. These spatially varying strain fields arise because of (1) non-uniform distribution of boundary traction, (2) presence of residual stress in the reference configuration, (3) the body being inhomogeneous. The strain measured using devices such as extensometer and strain gauge assumes that the strain is uniform over the gauge length, irrespective of the strains actual variation. Here the accuracy of the strain estimated using contact strain measurement techniques is investigated by assuming that the uniaxial strain (not stress) varies periodically along the measurement axis. A tight bound for the error in the measured strain is obtained and verified through numerical simulation. This study’s significant finding is that for gauge length of strain measurement about two times the periodicity of the strain variation, the measured strain’s value would be repeatable but with a significant error. Thus, one has to be cautious about the magnitude of the estimated non-uniform strain.Pratyush KumarU. SaravananElsevierarticleContact measurementsNon-uniform strainMeasurement errorProbabilistic estimateEngineering (General). Civil engineering (General)TA1-2040ENApplications in Engineering Science, Vol 7, Iss , Pp 100051- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Contact measurements Non-uniform strain Measurement error Probabilistic estimate Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Contact measurements Non-uniform strain Measurement error Probabilistic estimate Engineering (General). Civil engineering (General) TA1-2040 Pratyush Kumar U. Saravanan Feasibility on accurate measurement of non-uniform strain field through contact methods
description	When straight material filaments do not remain straight after deformation, the strain varies spatially. These spatially varying strain fields arise because of (1) non-uniform distribution of boundary traction, (2) presence of residual stress in the reference configuration, (3) the body being inhomogeneous. The strain measured using devices such as extensometer and strain gauge assumes that the strain is uniform over the gauge length, irrespective of the strains actual variation. Here the accuracy of the strain estimated using contact strain measurement techniques is investigated by assuming that the uniaxial strain (not stress) varies periodically along the measurement axis. A tight bound for the error in the measured strain is obtained and verified through numerical simulation. This study’s significant finding is that for gauge length of strain measurement about two times the periodicity of the strain variation, the measured strain’s value would be repeatable but with a significant error. Thus, one has to be cautious about the magnitude of the estimated non-uniform strain.
format	article
author	Pratyush Kumar U. Saravanan
author_facet	Pratyush Kumar U. Saravanan
author_sort	Pratyush Kumar
title	Feasibility on accurate measurement of non-uniform strain field through contact methods
title_short	Feasibility on accurate measurement of non-uniform strain field through contact methods
title_full	Feasibility on accurate measurement of non-uniform strain field through contact methods
title_fullStr	Feasibility on accurate measurement of non-uniform strain field through contact methods
title_full_unstemmed	Feasibility on accurate measurement of non-uniform strain field through contact methods
title_sort	feasibility on accurate measurement of non-uniform strain field through contact methods
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/f2cf4e3f36284899a0aeb2919dff9507
work_keys_str_mv	AT pratyushkumar feasibilityonaccuratemeasurementofnonuniformstrainfieldthroughcontactmethods AT usaravanan feasibilityonaccuratemeasurementofnonuniformstrainfieldthroughcontactmethods
_version_	1718405577574449152

Feasibility on accurate measurement of non-uniform strain field through contact methods

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