Abstract
This paper presents a micromechanical finite element model to study interlaminar damage propagation and relocation, known as delamination migration, between angled plies, consisting of a double-ply /0◦ Unit Cell (UC) in-between homogenised unidirectional 0◦ plies. Random fibre distributions and
appropriate constitutive models are used to model the different dissipative phenomena that occur at crack onset and propagation. Varying the upper ply fibres orientation, , and ply thickness, it is possible to assess their influence on the damage migration mechanism. Different features associated with delamination migration are analysed, such as the distribution of interlaminar shear stresses at
the crack tip and the kink angles. When comparing the results of the micromechanical model with previously conducted experimental observations, similar trends are obtained. It is concluded that the computational framework is able to simulate mode I interlaminar damage propagation and delamination
migration in multidirectional laminates, providing a sound tool to better understand the
conditions behind interlaminar crack migration.
appropriate constitutive models are used to model the different dissipative phenomena that occur at crack onset and propagation. Varying the upper ply fibres orientation, , and ply thickness, it is possible to assess their influence on the damage migration mechanism. Different features associated with delamination migration are analysed, such as the distribution of interlaminar shear stresses at
the crack tip and the kink angles. When comparing the results of the micromechanical model with previously conducted experimental observations, similar trends are obtained. It is concluded that the computational framework is able to simulate mode I interlaminar damage propagation and delamination
migration in multidirectional laminates, providing a sound tool to better understand the
conditions behind interlaminar crack migration.
| Original language | English |
|---|---|
| Journal | Composite Structures |
| Early online date | 09 Apr 2019 |
| DOIs | |
| Publication status | Early online date - 09 Apr 2019 |
Keywords
- Delamination migration
- Computational mechanics
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Dive into the research topics of 'Micromechanical analysis of interlaminar crack propagation between angled plies in mode I tests'. Together they form a unique fingerprint.Student theses
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High-resolution numerical models for damage assessment in composite materials
Varandas, L. (Author), Falzon, B. (Supervisor) & Catalanotti, G. (Supervisor), Dec 2020Student thesis: Doctoral Thesis › Doctor of Philosophy
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