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Mixed-mode (I+II) fracture characterization of wood bonded joints
Research highlights ► The MMB test is adequate for fracture characterization of wood bonded joints. ► The MMB test provides a wide range of mode mixities. ► The equivalent crack concept allows a suitable determination of fracture energy. ► The linear fracture criterion is proper except when small presence of mode I exists.
Abstract In this work fracture characterization of wood bonded joints is performed. The main objective is to define a fracture criterion under mixed-mode loading (I+II), in order to provide a safer and reliable design of wood bonded joints. Experimental fracture characterization tests were carried out. For mode I and mode II loading, the double cantilever beam and the end notched flexure tests were selected. Under mixed-mode I+II loading the mixed-mode bending test was used considering different mixed-mode ratios. A data reduction scheme based on the specimen compliance, the beam theory and on a crack equivalent concept was used to overcome the difficulties inherent to the above referred tests. The fracture linear energetic criterion showed to be adequate to describe the fracture envelop with an exception, as discussed in the paper.
Mixed-mode (I+II) fracture characterization of wood bonded joints
Research highlights ► The MMB test is adequate for fracture characterization of wood bonded joints. ► The MMB test provides a wide range of mode mixities. ► The equivalent crack concept allows a suitable determination of fracture energy. ► The linear fracture criterion is proper except when small presence of mode I exists.
Abstract In this work fracture characterization of wood bonded joints is performed. The main objective is to define a fracture criterion under mixed-mode loading (I+II), in order to provide a safer and reliable design of wood bonded joints. Experimental fracture characterization tests were carried out. For mode I and mode II loading, the double cantilever beam and the end notched flexure tests were selected. Under mixed-mode I+II loading the mixed-mode bending test was used considering different mixed-mode ratios. A data reduction scheme based on the specimen compliance, the beam theory and on a crack equivalent concept was used to overcome the difficulties inherent to the above referred tests. The fracture linear energetic criterion showed to be adequate to describe the fracture envelop with an exception, as discussed in the paper.
Mixed-mode (I+II) fracture characterization of wood bonded joints
de Moura, M.F.S.F. (author) / Oliveira, J.M.Q. (author) / Morais, J.J.L. (author) / Dourado, N. (author)
Construction and Building Materials ; 25 ; 1956-1962
2010-11-13
7 pages
Article (Journal)
Electronic Resource
English
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