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Experimental and numerical study of oblique transverse cracking in cross-ply laminates under tension

Experimental and numerical study of oblique transverse cracking in cross-ply laminates under tension
Experimental and numerical study of oblique transverse cracking in cross-ply laminates under tension
The first damage mode in cross-ply laminates under tension is broadly accepted as transverse cracks normal to the loading direction in the 90° layers, but there is not the same agreement about the second damage mode. While most of the analytical and experimental results are based on delamination induced by transverse cracking, another type of damage, oblique cracks within the 90° layers, has also been observed as the second damage mode in [0/904]s laminates. To understand the cause of this phenomenon, FE analyses considering damage development at the interfaces were performed. The obtained results indicate that the main reason for the oblique cracking damage mode is the higher toughness of the material in mode-II compared with mode-I: when the value of shear toughness is close to the opening toughness, the second damage mode in cross-ply laminates under tensile loading is delamination induced by transverse cracks, however, if the difference between the two values is large, oblique cracks in the 90°layers are likely to appear. In the specific tested and analysed laminate, if the mode II toughness is double the mode I toughness, oblique cracking occurs but if the values of mode I and mode II toughness are close, delamination is the second damage mode.
B. delamination, B. transverse cracking, C. finite element analysis (FEA), D. optical microscopy
1359-835X
140-148
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a
Hosseini-Toudeshky, Hossein
772af740-2748-4c22-8aa3-69868fb29673
Mohammadi, Bijan
b895f67a-7128-4b11-bf96-e06781a1d392
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a
Hosseini-Toudeshky, Hossein
772af740-2748-4c22-8aa3-69868fb29673
Mohammadi, Bijan
b895f67a-7128-4b11-bf96-e06781a1d392

Jalalvand, Meisam, Wisnom, Michael R., Hosseini-Toudeshky, Hossein and Mohammadi, Bijan (2014) Experimental and numerical study of oblique transverse cracking in cross-ply laminates under tension. Composites Part A: Applied Science and Manufacturing, 67, 140-148. (doi:10.1016/j.compositesa.2014.08.004).

Record type: Article

Abstract

The first damage mode in cross-ply laminates under tension is broadly accepted as transverse cracks normal to the loading direction in the 90° layers, but there is not the same agreement about the second damage mode. While most of the analytical and experimental results are based on delamination induced by transverse cracking, another type of damage, oblique cracks within the 90° layers, has also been observed as the second damage mode in [0/904]s laminates. To understand the cause of this phenomenon, FE analyses considering damage development at the interfaces were performed. The obtained results indicate that the main reason for the oblique cracking damage mode is the higher toughness of the material in mode-II compared with mode-I: when the value of shear toughness is close to the opening toughness, the second damage mode in cross-ply laminates under tensile loading is delamination induced by transverse cracks, however, if the difference between the two values is large, oblique cracks in the 90°layers are likely to appear. In the specific tested and analysed laminate, if the mode II toughness is double the mode I toughness, oblique cracking occurs but if the values of mode I and mode II toughness are close, delamination is the second damage mode.

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More information

Accepted/In Press date: 2 August 2014
e-pub ahead of print date: 12 August 2014
Published date: 31 December 2014
Keywords: B. delamination, B. transverse cracking, C. finite element analysis (FEA), D. optical microscopy

Identifiers

Local EPrints ID: 446716
URI: http://eprints.soton.ac.uk/id/eprint/446716
ISSN: 1359-835X
PURE UUID: ea82abd0-fd24-4118-a907-c9b31e808610
ORCID for Meisam Jalalvand: ORCID iD orcid.org/0000-0003-4691-6252

Catalogue record

Date deposited: 19 Feb 2021 17:30
Last modified: 20 Feb 2021 02:59

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Contributors

Author: Michael R. Wisnom
Author: Hossein Hosseini-Toudeshky
Author: Bijan Mohammadi

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