Modelling manufacturing deformations in corner sections made of composite materials

�inar, Kenan; Wisnom, Michael R.; �?nar, Kenan; �zt�rk, Umud Esat; Ersoy, Nuri; Wisnom, Michael R

Abstract

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: sagepub.co.uk/journalsPermissions.nav.

• 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
• Publicly Available Date: Jan 29, 2019
• 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
• DOI: https://doi.org/10.1177/0021998313477896
• Keywords: polymer–matrix composites, residual/internal stress, finite element analysis, autoclave
• Public URL: https://uwe-repository.worktribe.com/output/827452
• Publisher URL: http://dx.doi.org/10.1177/0021998313477896
• Additional Information: Additional Information : Copyright(c)2013 Reprinted by permission of SAGE publications.
• Contract Date: Jul 19, 2018