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Dynamics model of active fixturing systems for thin-walled parts under moving loads

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Abstract

This work presents a modelling approach that captures the dynamic response of active fixture elements and thin-walled workpieces subjected to dynamic moving loads. The impedance coupling method is deployed to achieve the integration of analytical expressions for the active elements and a discretised finite element-based model of a workpiece. The proposed model is validated experimentally and analytically via a test case, involving a single active fixture element in contact with a thin aluminium plate subjected to an evenly distributed dynamic moving load. A very good agreement is observed between the time response of the modelled and the experimental system to step and harmonic inputs. The moving load modelling approach presents a maximum error of ε = 5.82% in terms of predicting the dynamic elastic deformation of the workpiece in comparison to an analytical model.

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Authors and Affiliations

  1. Manufacturing Research Division, Faculty of Engineering, University of Nottingham, Nottingham, NG7 2RD, UK

    Thomas N. Papastathis, Svetan M. Ratchev & Atanas A. Popov

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  1. Thomas N. Papastathis
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  2. Svetan M. Ratchev
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  3. Atanas A. Popov
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Correspondence to Thomas N. Papastathis.

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Papastathis, T.N., Ratchev, S.M. & Popov, A.A. Dynamics model of active fixturing systems for thin-walled parts under moving loads. Int J Adv Manuf Technol 62, 1233–1247 (2012). https://doi.org/10.1007/s00170-011-3868-3

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  • DOI: https://doi.org/10.1007/s00170-011-3868-3

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