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A stochastic multiaxial fatigue model for off-axis cracking in FRP laminates

A stochastic multiaxial fatigue model for off-axis cracking in FRP laminates
A stochastic multiaxial fatigue model for off-axis cracking in FRP laminates
A model to predict off-axis crack evolution in multidirectional laminates subjected to multiaxial loading is proposed. The model applies multi-scale stress and local fracture mechanics analyses to distinguish between two microscopic damage mechanisms, which govern the damage evolution, as well as determining the magnitude of the damage evolution rate associated with each microscopic damage mechanism. The multi-scale analysis is based on the GLOB-LOC off-axis crack damage model, which is extended to include substantial new capabilities such as the influence of crack face sliding interaction and prediction of variations in the stress field due to the local crack density. The extension of the GLOB-LOC model introduces physically based multiaxial fatigue criteria for off-axis crack initiation and mixed-mode off-axis crack propagation. The extended GLOB-LOC model is implemented and it is demonstrated that good predictions are obtained for the damage evolution under various multiaxial stress conditions. Furthermore it is shown that the model only requires input from two different multiaxial stress states to obtain the material parameters for a given FRP ply.
fatigue, polymer-matrix composites, transverse cracking, damage mechanics
0142-1123
Glud, Jens
75d38314-d14c-41ec-9b4e-c8fa0b1eea51
Dulieu-Barton, Janice
9e35bebb-2185-4d16-a1bc-bb8f20e06632
Thomsen, Ole T.
f3e60b22-a09f-4d58-90da-d58e37d68047
Overgaard, L.C.T.
7a39e1eb-2afd-4f49-900b-8732c8013697
Glud, Jens
75d38314-d14c-41ec-9b4e-c8fa0b1eea51
Dulieu-Barton, Janice
9e35bebb-2185-4d16-a1bc-bb8f20e06632
Thomsen, Ole T.
f3e60b22-a09f-4d58-90da-d58e37d68047
Overgaard, L.C.T.
7a39e1eb-2afd-4f49-900b-8732c8013697

Glud, Jens, Dulieu-Barton, Janice, Thomsen, Ole T. and Overgaard, L.C.T. (2017) A stochastic multiaxial fatigue model for off-axis cracking in FRP laminates. International Journal of Fatigue, 103. (doi:10.1016/j.ijfatigue.2017.06.012).

Record type: Article

Abstract

A model to predict off-axis crack evolution in multidirectional laminates subjected to multiaxial loading is proposed. The model applies multi-scale stress and local fracture mechanics analyses to distinguish between two microscopic damage mechanisms, which govern the damage evolution, as well as determining the magnitude of the damage evolution rate associated with each microscopic damage mechanism. The multi-scale analysis is based on the GLOB-LOC off-axis crack damage model, which is extended to include substantial new capabilities such as the influence of crack face sliding interaction and prediction of variations in the stress field due to the local crack density. The extension of the GLOB-LOC model introduces physically based multiaxial fatigue criteria for off-axis crack initiation and mixed-mode off-axis crack propagation. The extended GLOB-LOC model is implemented and it is demonstrated that good predictions are obtained for the damage evolution under various multiaxial stress conditions. Furthermore it is shown that the model only requires input from two different multiaxial stress states to obtain the material parameters for a given FRP ply.

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A stochastic multiaxial fatigue model for offaxis cracking in FRP laminates - Accepted Manuscript
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Accepted/In Press date: 7 June 2017
Published date: 11 June 2017
Keywords: fatigue, polymer-matrix composites, transverse cracking, damage mechanics

Identifiers

Local EPrints ID: 412870
URI: http://eprints.soton.ac.uk/id/eprint/412870
ISSN: 0142-1123
PURE UUID: 28fee08c-8f56-4137-aa31-5e044b1a6085

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Date deposited: 04 Aug 2017 16:30
Last modified: 07 Oct 2020 05:17

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