Abstract
Shear strength is one of the properties often used to qualify a wood species for use in industry. But until now there is no standardized test which allows understanding this phenomenon. This paper constitutes a new approach to study the behavior of the wood material subjected to the mode II fracture. For that we designed and realized a new prototype of a wooden specimen that we tested in our laboratory which gives rise to an evaluation of the fracture until separation by pure shear of the specimen in the TL plane. The experimental data from a first series of tests on Thuja wood (Tetraclinis Articulata (Vahl) Masters) as a test material as well as the calculation of mode II initiation fracture toughness and the critical stress intensity factor are presented in this paper.
Highlights
A t the beginning of the 21st century, environmental issues require the special attention of researchers
The mode I fracture has been widely studied by different researchers using several types of standard specimens namely: compact tension (CT), single-edge notched tension (SENT), double-edge notched tension (DENT), single-edge notched three-point Bending (SENB) tests [1,2,3,4,5] and the Double Cantilever Beam (DCB)
Wood fracture behavior under shear is one of the phenomena until now not fully controlled, that is why several prototypes have been proposed to approach closely the nature of the fracture in mode II of rupture, the three main tests are based on flexure: the most commonly used test is the End-Notched Flexure (ENF) which is a beam-like test specimen containing an artificial crack on one side and is loaded under three-point bending
Summary
A t the beginning of the 21st century, environmental issues require the special attention of researchers. It makes it possible to predict the critical propagation length as a function of the loading applied. A new test prototype is presented which is easy to use and stable and in which the rupture of the specimen can be perceived under mode II
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