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Parametric variational analysis of compliant sheet metal assemblies with shell elements
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Gerbino, Salvatore, Franciosa, Pasqual and Patalano, Stanislao (2015) Parametric variational analysis of compliant sheet metal assemblies with shell elements. Procedia CIRP, 33 . pp. 340-345. doi:10.1016/j.procir.2015.06.077 ISSN 2212-8271.
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Official URL: http://dx.doi.org/10.1016/j.procir.2015.06.077
Abstract
One of most demanding tasks in the manufacturing field is controlling the variability of parts as it may affect strongly the deliverability of key characteristics defined at the final (product) assembly level. Current CAT systems offer a good solution to the tolerance analysis/synthesis task, but to handle flexible objects with shape errors more effort is needed to include methods able to capture the elastic behaviour of parts that adds more variability on the final assembly. Usually, sheet metal assemblies require dedicated fixtures and clamps layout to control the gap between parts in the specific location where a join must be placed. Due to the variability of parts the position of clamps can also be varied. The paper describes a FEM-based method able take into account part flexibility and shape error to parametrically analyse sheet metal assemblies by acting on some key parameters to look for the optimal clamp layout that guarantee the gap between parts to be under control after joining parts together. This method offers, with respect to commercial solutions, the ability to model fixtures, clamps and different joint types with no matter on the mesh nodes’ position. Locations of such elements are based on the shape functions defined at element (shell) mesh level and modelled as local constraints. So the user can generate a mesh without a previous knowledge of the exact positions of clamps, for example. This allows to conduit a faster parametric analysis without remeshing the surfaces and with no need to physically model the clamps. An aeronautic case study is described with a four-part assembly riveted on a quite complex fixture by using several clamps.
Item Type: | Journal Article | ||||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||
Library of Congress Subject Headings (LCSH): | Sheet metal -- Design and construction | ||||||
Journal or Publication Title: | Procedia CIRP | ||||||
Publisher: | Elsevier | ||||||
ISSN: | 2212-8271 | ||||||
Official Date: | 2015 | ||||||
Dates: |
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Volume: | 33 | ||||||
Number of Pages: | 6 | ||||||
Page Range: | pp. 340-345 | ||||||
DOI: | 10.1016/j.procir.2015.06.077 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Date of first compliant deposit: | 30 December 2015 | ||||||
Date of first compliant Open Access: | 30 December 2015 | ||||||
Funder: | Programma Operativo Nazionale Ricerca e Competitività (NOP) | ||||||
Grant number: | PON01_01268 (NOP) |
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