Quasi-non-linear fracture mechanics analysis of the splitting failure of single dowel joints loaded perpendicular to grain |
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Authors: | Jørgen Lauritzen Jensen |
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Institution: | (1) Institute of Wood Technology, Akita Prefectural University, 11-1 Kaieizaka, Noshiro 016-0876, Japan |
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Abstract: | A quasi-non-linear fracture mechanics model based on beam on elastic foundation theory is applied for analysis of dowel joints
with a single dowel loaded perpendicular to grain. The properties of the elastic foundation are chosen so that the perpendicular-to-grain
tensile strength and fracture energy properties of the wood are correctly represented. It is shown that this particular choice
of foundation stiffness makes a conventional maximum stress failure criterion lead to the same solution as the compliance
method of fracture mechanics. Results of linear elastic fracture mechanics are obtained as a special case by assuming an infinitely
large value of the foundation stiffness. Results of tests on so-called plate joints are compared with theoretical predictions,
showing good agreement for variations in initial crack length as well as edge distance. |
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Keywords: | Dowel joints Perpendicular-to-grain load Plate joint specimen Quasi-non-linear fracture mechanics Beam on elastic foundation |
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