TAILIEUCHUNG - Báo cáo lâm nghiệp: "Study of the properties of thirteen tropical wood species to improve the prediction of cutting forces in mode B"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: Study of the properties of thirteen tropical wood species to improve the prediction of cutting forces in mode B. | Ann. For. Sci. 61 2004 55-64 INRA EDP Sciences 2004 DOI forest 2003084 55 Original article Study of the properties of thirteen tropical wood species to improve the prediction of cutting forces in mode B. Florent EYMAa Pierre-Jean MÉAUSOONEb Patrick MARTINc a IUT Paul Sabatier Dépt GMP University of Toulouse 1 rue Lautréamont 65000 Tarbes France b Enstib University of Nancy 27 rue du Merle Blanc 88000 Epinal France c Ensam 4 rue des Augustin Fresnel 57000 Metz France Received 13 September 2002 accepted 16 December 2002 Abstract - The aim of this study is to investigate the influence of the physical and mechanical characteristics on the behaviour of wood during machining for cutting process 90-0 . In order to work on relatively homogeneous wood species it was decided to use tropical woods. Different characteristics were measured Physical specific gravity shrinkage and Mechanical hardness fracture toughness shearing compression parallel to the grain These characteristics were assessed separately to cutting forces involved during machining. Results obtained showed good correlations particularly with very good results for fracture toughness parameters. Then different formulations based on statistical analysis using all parameters allowed to define a new material coefficient Km to predict the general behaviour of wood during machining and the cutting forces involved more precisely. It appeared clearly that the study of wood characteristics is a good means to improve knowledge on cutting condition optimisation and to predict quality and efficiency of the cutting process. cutting forces mechanical characteristics tropical wood specific gravity wood machining Résumé - Étude des propriétés de 13 essences de bois tropicaux pour améliorer la prediction des efforts de coupe en mode B. Le but de ce travail est d étudier l effet des caractéristiques physiques et mécaniques du bois sur son comportement durant l usinage dans le processus de coupe 90-0 . De aeon à travailler

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