Direct evaluation of intra and interlaminar fracture properties of composite laminates
Composites, due to its non-homogeneous internal structure, present complicated modes of damage with interaction between them. The design of actual components made of composites requires the knowledge of properties associated with these mechanisms of damage, able to predict its onset and propagation....
| Autores: | , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2026 |
| País: | España |
| Recursos: | Universidad de Sevilla (US) |
| Repositório: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:dnet:idus________::e6b00b71c363597a1cc084441f58ece8 |
| Acesso em linha: | https://hdl.handle.net/11441/183912 https://doi.org/10.1016/j.compositesb.2026.113542 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Composites Damage Fracture mechanics Toughness In-situ determination of properties |
| Resumo: | Composites, due to its non-homogeneous internal structure, present complicated modes of damage with interaction between them. The design of actual components made of composites requires the knowledge of properties associated with these mechanisms of damage, able to predict its onset and propagation. This requires knowing the values of properties associated with damage that can be represented by a crack. The two most significant properties for a [0,90n,0] laminate are the intralaminar fracture toughness of the 90-degree ply under mode I, GIC90 and the interlaminar fracture toughness between 0- and 90-degree plies, GC0/90. In this paper, following previous developments of the authors, a procedure combining experimental tests and numerical modelling based on Boundary Element Method (BEM) has been designed to estimate the aforementioned properties by means of a global energy balance. First, conditions leading to a damage consisting in a transverse crack in the 90-degree ply are identified, the energy balance from the pristine state allowing the value of to be determined. Second, conditions under which a damage consisting in a transverse crack plus delamination are also identified. The energy balance (involving now the value of GIC90GIC previously obtained) allows now the value of GC0/90 to be determined. In both cases, displacements and stresses are calculated by means of a BEM analysis on the damaged configuration, which is identified experimentally. The coherence of the values of the two properties found and its representativity in actual composite structures is finally highlighted. The procedure developed represents a reliable tool to estimate properties of composite laminates working directly on the actual configuration, with the actual loading and involving the actual mechanisms of damage that the laminate has in an actual structure. |
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