Publications Scientifiques
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Item Traceability in wood production(2013) Zerizer, A.; Nacereddine, H.; Aknouche, HamidItem Characterization of algerians oak wood by x-Ray tomographic scanner and free software image-J(Statny Drevarsky Vyskumny Ustav, 2014) Zerizer, A.; Sitouah, N.; Aknouche, A.; Mothe, F.; Kennouche, S.Item Tool wear effect on cutting forces : in routing process of aleppo pine wood(2009) Aknouche, Hamid; Outahyon, A.; Nouveau, C.; Marchal, R.; Zerizer, A.; Butaud, J.C.This paper uses the cutting forces in a routing process of Aleppo pine wood to estimate the tool wear effect. The aim is to obtain further information about the tool wear effect by monitoring the variation in the cutting forces. A Kistler 9257A 3 axes Dynamometer was positioned under the workpiece to measure the cutting forces at frequencies up to 10,000 Hz. The experiments were carried out on a CNC routing machine RECORD1 of SCM. A carbide tool was used and the cutting parameters were fixed. The cutting speed was approximately 25 m/s. Dasylab software was used to capture the data. The results show a correlation between the tool wear and the computed angle ( ), between the tangential and cutting forces. In fact, the variation of ( ) is unstable in the running period and stable in the linear wear zone, included in the interval [−1.11◦; −1.10◦]. This study was performed as part of a development program for the Algerian wood industry, hence the selection Aleppo pine wood as the working materialItem Modeling rot in wood by replacement of wood with sand : an experimental study(2006) Zerizer, A.; Ouis, D.Rot is known to affect the strength properties of wood. At the same time, the damping properties of the attacked material have also been shown to change. This article presents the results of an experimental study in which rot in wood was modeled by the replacement of wood with sand. The procedure entailed the drilling of holes in the body of a wooden beam, filling the holes with sand, and monitoring the changes induced by the sand-filled holes on the values of the modulus of elasticity (MOE) and of the loss factor. The MOE was calculated from the resonance frequency of the first longitudinal mode of vibration, and the loss factor was obtained indirectly from the impulse response by means of a room acoustical technique. The results show that the MOE value, and hence the strength characteristic of the wood specimen, decreases at the same time as the loss factor increases