Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/4160
Título: Experimental and numerical evaluation of composite repairs on wood beams damaged by cross-graining
Autor: Campilho, Raul
Moura, M. F. S. F. de
Barreto, A. M. J. P.
Morais, J. J. L.
Domingues, J. J. M. S.
Palavras-chave: Wood
Composite
Repair
Cohesive zone models
Finite element analysis
Data: 2010
Editora: Elsevier
Relatório da Série N.º: Construction and Building Materials; Vol. 24, Issue 4
Resumo: An experimental and Finite Element study was performed on the bending behaviour of wood beams of the Pinus Pinaster species repaired with adhesively-bonded carbon–epoxy patches, after sustaining damage by cross-grain failure. This damage is characterized by crack growth at a small angle to the beams longitudinal axis, due to misalignment between the wood fibres and the beam axis. Cross-grain failure can occur in large-scale in a wood member when trees that have grown spirally or with a pronounced taper are cut for lumber. Three patch lengths were tested. The simulations include the possibility of cohesive fracture of the adhesive layer, failure within the wood beam in two propagation planes and patch interlaminar failure, by the use of cohesive zone modelling. The respective cohesive properties were estimated either by an inverse method or from the literature. The comparison with the tests allowed the validation of the proposed methodology, opening a good perspective for the reduction of costs in the design stages of these repairs due to extensive experimentation.
Peer review: yes
URI: http://hdl.handle.net/10400.22/4160
ISSN: 0950-0618
Versão do Editor: http://www.sciencedirect.com/science/article/pii/S0950061809003432
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