Zhang, B. orcid.org/0000-0002-0428-7745, Allegri, G. and Hallett, S.R. orcid.org/0000-0003-0751-8323 (2022) Embedding artificial neural networks into twin cohesive zone models for composites fatigue delamination prediction under various stress ratios and mode mixities. International Journal of Solids and Structures, 236-237. 111311. ISSN 0020-7683
Abstract
This paper presents for the first time a novel numerical technique for modelling fatigue delamination growth in fibre reinforced composites, which is based on coupling two twin cohesive zone models with a single-hidden-layer artificial neural network. The simulation approach proposed here can describe composites fatigue delamination under negative & positive stress ratios and the full range of mode mixities. In the modelling strategy, each segment of a composites interface is described by two twin cohesive elements, which jointly provide local fracture mechanics parameters into a feedforward single-hidden-layer neural network, without the need to know the global load R ratio. In turn, the neural network algorithm feeds the fatigue crack propagation rate back into the twin cohesive elements, which follow a static and fatigue cohesive law in a synchronous fashion. The novel modelling methodology has been implemented in an explicit finite element scheme. The modelling strategy is first verified and validated by several benchmark cases, involving mode I Double Cantilever Beam tests, mode II End Loaded Split tests with and without reversal, as well as Mixed-Mode Bending tests. A relevant application of the modelling technique is demonstrated considering a tapered laminate, which experiences non-proportional loading due to the presence of combined static tension and cyclic bending.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2021 Elsevier Ltd. This is an author produced version of a paper published in International Journal of Solids and Structures. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Cohesive zone model; Delamination; Fatigue; Finite element; Interface; Numerical methods |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Engineering Systems and Design (iESD) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 17 Jan 2024 11:36 |
Last Modified: | 17 Jan 2024 11:43 |
Published Version: | http://dx.doi.org/10.1016/j.ijsolstr.2021.111311 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.ijsolstr.2021.111311 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:207404 |