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Modelling manufacturing deformations in corner sections made of composite materials



Michael R. Wisnom


Umud Esat

Nuri Ersoy

Michael R Wisnom


A three-step finite element model has been implemented to predict the spring-in of L-shaped parts. The material property development during the cure has been modelled as step changes during transitions between viscous, rubbery and glassy states of the resin. The tool-part interaction is modelled as a sliding interface with a constant sliding shear stress. The effect of various material and geometric variables on the deformation of L-Section parts are investigated by a parameter sensitivity analysis. The spring-in predictions obtained by the finite element method are compared to experimental measurements for unidirectional and cross-ply parts of various thicknesses and radii. Results indicate that although a 2D plane strain model can predict the spring-in measured at the symmetry plane fairly well, it is not sufficient to capture the complex deformation patterns observed. © The Author(s) 2013 Reprints and permissions:


Çinar, K., Wisnom, M. R., Ç─▒nar, K., Öztürk, U. E., Ersoy, N., & Wisnom, M. R. (2014). Modelling manufacturing deformations in corner sections made of composite materials. Journal of Composite Materials, 48(7), 799-813.

Journal Article Type Article
Acceptance Date Jan 1, 2013
Online Publication Date Mar 7, 2013
Publication Date Mar 1, 2014
Deposit Date Jul 19, 2018
Journal Journal of Composite Materials
Print ISSN 0021-9983
Electronic ISSN 1530-793X
Publisher SAGE Publications
Peer Reviewed Peer Reviewed
Volume 48
Issue 7
Pages 799-813
Keywords polymer–matrix composites, residual/internal stress, finite element analysis, autoclave
Public URL
Publisher URL
Additional Information Additional Information : Copyright(c)2013 Reprinted by permission of SAGE publications.


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