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Saint-Venant effects in the Iosipescu specimen

Saint-Venant effects in the Iosipescu specimen
Saint-Venant effects in the Iosipescu specimen
The main purpose of this paper is to explain the shear strain differences observed between the two faces of certain Iosipescu specimens. The different parasitic moments that can act on the specimen are investigated and their effects assessed. Different Iosipescu fixtures from the literature are checked for these parasitic moments and it is shown that modification of the Wyoming fixture can lead to the elimination of its parasitic in-plane and out-of-plane movements. Finally, it is shown that the strain differences that remain are caused by Saint-Venant effects due to the proximity of the loading points to the notch line but that averaging the strains between the two faces eliminates this effect. This is an important feature since for certain material configurations (thick and transversely stiff specimens), preventing twisting of the fixture is not sufficient to enable the use of only one strain gauge.

0021-9983
1986-2015
Pierron, F.
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
Pierron, F.
a1fb4a70-6f34-4625-bc23-fcb6996b79b4

Pierron, F. (1998) Saint-Venant effects in the Iosipescu specimen Journal of Composite Materials, 32, (22), pp. 1986-2015. (doi:10.1177/002199839803202201).

Record type: Article

Abstract

The main purpose of this paper is to explain the shear strain differences observed between the two faces of certain Iosipescu specimens. The different parasitic moments that can act on the specimen are investigated and their effects assessed. Different Iosipescu fixtures from the literature are checked for these parasitic moments and it is shown that modification of the Wyoming fixture can lead to the elimination of its parasitic in-plane and out-of-plane movements. Finally, it is shown that the strain differences that remain are caused by Saint-Venant effects due to the proximity of the loading points to the notch line but that averaging the strains between the two faces eliminates this effect. This is an important feature since for certain material configurations (thick and transversely stiff specimens), preventing twisting of the fixture is not sufficient to enable the use of only one strain gauge.

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More information

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

Identifiers

Local EPrints ID: 210695
URI: http://eprints.soton.ac.uk/id/eprint/210695
ISSN: 0021-9983
PURE UUID: 542510f8-1d13-4c27-a822-93ac132352b9
ORCID for F. Pierron: ORCID iD orcid.org/0000-0003-2813-4994

Catalogue record

Date deposited: 15 Feb 2012 17:04
Last modified: 18 Jul 2017 10:45

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