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Contribution au développement de procédés innovants pour une transformation plus efficiente du chêne

Abstract : Common manufacturing process of glued wood products consists of many steps. During primary wood processing, fresh-cut round woods (i.e. with high moisture content) are sawn into boards. After drying, these boards are sorted according to aesthetic requirements, and/or to guarantee their mechanical properties in the case of structural uses. Secondary wood consist of many dry wood machining and gluing phases to finally get end products. The different features of hardwood compared to softwood result currently in a lower productivity in the manufacturing process than softwood. This restricts significantly the competitiveness of hardwood products. Furthermore, primary and secondary wood processing are currently quite separated from each other, with often different operators, which is another reason of a less efficient process. The goal of this thesis is to develop, in the particular case of hardwoods (oak, beech, ash...), a better integration of problematics associated with the manufacturing of the end product from the start, i.e. primary wood processing. This aims to increase wood recovery and productivity of the factory of the future of hardwood products. For this purpose, the use of technologies developed into laboratory and organizational considerations will be particularly studied. This thesis develops three research axis: firstly, the performance assessment of a laser scanner to measure fiber orientation; secondly the modelling of distortions of oak square-edged timbers during the drying process starting from fiber orientation measurement; thirdly, using data from a laser scanner to optimize the production of oak finger jointing lamellae and the strength control of finger jointed timber.
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Submitted on : Thursday, July 7, 2022 - 5:29:40 PM
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  • HAL Id : tel-03716762, version 1

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Benoît Besseau. Contribution au développement de procédés innovants pour une transformation plus efficiente du chêne. Génie mécanique [physics.class-ph]. HESAM Université, 2021. Français. ⟨NNT : 2021HESAE056⟩. ⟨tel-03716762⟩

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