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Modélisation et validation expérimentale de la distorsion de plaques usinées

Abstract : Heat exchangers used in new nuclear power generation plants are made of AISI 316L stainless steel plates stacked in order to improve their efficiency and compactness. During the plates production, residual stresses appear and could cause distortion. To ensure the assembly, this distortion must be controlled and minimized, mainly by controlling the evolution of the residual stress field. Residual stresses generated by manufacturing processes preceding machining were measured using various methods. Then, the obtained residual stresses distributions were integrated into a developed model to predict part distortion, considering the clamping and machining sequence effects. Experimental validation was carried out using a smart experimental device with force sensors integrated in a clamping system was developed. The influence of machining conditions on the plate distortion was also studied using this set-up. Finally, the developed model was used to optimize the machining strategy in order to minimize the distortion.
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Submitted on : Monday, February 17, 2020 - 12:37:29 PM
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  • HAL Id : tel-02481224, version 1

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Iheb Cherif. Modélisation et validation expérimentale de la distorsion de plaques usinées. Autre [cond-mat.other]. Ecole nationale supérieure d'arts et métiers - ENSAM, 2019. Français. ⟨NNT : 2019ENAM0040⟩. ⟨tel-02481224⟩

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