Resumo

BARRETO, A.M.J.P.; MOURA, M.F.S.F. de  e  CAMPILHO, R.D.S.G.. Análise numérica de um provete para a caracterização do comportamento à fractura da madeira sob solicitações de modo misto I/III. C.Tecn. Mat. [online]. 2009, vol.21, n.3-4, pp.20-25. ISSN 0870-8312.

In this work a numerical analysis of a specimen adequate for wood fracture characterization under mixed-mode I+III loading was performed. The specimen has a geometry similar to the one used in the Edge Crack Torsion test and provides different combinations of mixed-mode I+III. The distribution of strain energy release rates at the crack front was estimated through the virtual crack close technique. The variation of the distance between loading actuators allows changing the mixed-mode ratio easily. A cohesive mixed-mode damage model was used to simulate damage initiation and growth considering three different mode ratios. The application of the virtual crack close technique and compliance calibration methods originate consistent results which validate the proposed test.

Palavras-chave : Wood; Fracture; Mixed-mode I+III.

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