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Whole-field assessment of the effects of boundary conditions on the strain field in off-axis tensile testing of unidirectional composites

Pierron, F., Alloba, E., Surrel, Y. and Vautrin, A. (1998) Whole-field assessment of the effects of boundary conditions on the strain field in off-axis tensile testing of unidirectional composites Composites Science and Technology, 58, (12), pp. 1939-1947. (doi:10.1016/S0266-3538(98)00027-X).

Record type: Article

Abstract

The objective of this paper is to present an experimental assessment of the effects of boundary conditions on the strain field in 10° off-axis tensile tests on unidirectional carbon/epoxy composites. It is shown experimentally by using a whole-field phase stepped grid technique that oblique tabbing of off-axis coupons results in a homogeneous strain field over the whole specimen, thus preventing premature failure near the tabs. A numerical sensitivity study reveals that the oblique angle is not very sensitive to the elastic moduli values. Therefore only estimates of the moduli are needed to derive the oblique angle. It is also shown by finite-element analysis that a 3° error on the oblique angle is acceptable in terms of stress concentrations near the tabs, but that a 7° error leads to significant stress concentrations for this material.

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Published date: 1998
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 210697
URI: http://eprints.soton.ac.uk/id/eprint/210697
ISSN: 0266-3538
PURE UUID: e6aa0e33-3843-423f-9d2a-acdfb6892154
ORCID for F. Pierron: ORCID iD orcid.org/0000-0003-2813-4994

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Date deposited: 14 Feb 2012 17:41
Last modified: 18 Jul 2017 10:45

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Contributors

Author: F. Pierron ORCID iD
Author: E. Alloba
Author: Y. Surrel
Author: A. Vautrin

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