Effect of shear stresses on fibre direction tensile failure using a new simple and reliable test method with thin plies
Effect of shear stresses on fibre direction tensile failure using a new simple and reliable test method with thin plies
A new method of creating in-plane combined tension-shear stress states using only tensile loading is proposed. Thin-ply angle-ply carbon/epoxy laminates are sandwiched between unidirectional glass layers to eliminate any stress concentration around the samples ends and gripping zone. Use of the thin plies successfully suppresses early occurrence of other modes of failure i.e. matrix cracking and free-edge delamination, so the first mode of failure is fibre failure in the angle-ply carbon sub-laminate. Compared with other methods of creating combined tension-shear stresses, the proposed technique has a simpler geometry, is significantly easier and cheaper to manufacture and test. Therefore, it provides more repeatable low-scatter experimental results. The obtained experimental results showed that the presence of in-plane shear stresses did not have a significant impact on the tensile fibre-direction failure strain of the tested carbon/epoxy laminate, suggesting that even at high shear stresses, the longitudinal tensile strength of the carbon/epoxy laminate is not significantly reduced.
Failure criterion, Hybrid composites, Polymer-matrix composites (PMCs), Strength
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Fotouhi, Mohammad
23acb91e-43ef-48fe-b437-2a5234c837b4
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a
15 April 2024
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Fotouhi, Mohammad
23acb91e-43ef-48fe-b437-2a5234c837b4
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a
Jalalvand, Meisam, Fotouhi, Mohammad and Wisnom, Michael R.
(2024)
Effect of shear stresses on fibre direction tensile failure using a new simple and reliable test method with thin plies.
Composites Part A: Applied Science and Manufacturing, 182, [108155].
(doi:10.1016/j.compositesa.2024.108155).
Abstract
A new method of creating in-plane combined tension-shear stress states using only tensile loading is proposed. Thin-ply angle-ply carbon/epoxy laminates are sandwiched between unidirectional glass layers to eliminate any stress concentration around the samples ends and gripping zone. Use of the thin plies successfully suppresses early occurrence of other modes of failure i.e. matrix cracking and free-edge delamination, so the first mode of failure is fibre failure in the angle-ply carbon sub-laminate. Compared with other methods of creating combined tension-shear stresses, the proposed technique has a simpler geometry, is significantly easier and cheaper to manufacture and test. Therefore, it provides more repeatable low-scatter experimental results. The obtained experimental results showed that the presence of in-plane shear stresses did not have a significant impact on the tensile fibre-direction failure strain of the tested carbon/epoxy laminate, suggesting that even at high shear stresses, the longitudinal tensile strength of the carbon/epoxy laminate is not significantly reduced.
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Accepted/In Press date: 16 March 2024
e-pub ahead of print date: 19 March 2024
Published date: 15 April 2024
Keywords:
Failure criterion, Hybrid composites, Polymer-matrix composites (PMCs), Strength
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Local EPrints ID: 500787
URI: http://eprints.soton.ac.uk/id/eprint/500787
ISSN: 1359-835X
PURE UUID: 66494bed-7161-47fa-8224-c9d80aa02d5b
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Date deposited: 13 May 2025 16:46
Last modified: 14 May 2025 02:02
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Author:
Mohammad Fotouhi
Author:
Michael R. Wisnom
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