Modelling manufacturing deformations in corner sections made of composite materials

Kenan Çinar, Umud Esat Öztürk, Nuri Ersoy*, Michael R. Wisnom

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

31 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)799-813
Number of pages15
JournalJournal of Composite Materials
Volume48
Issue number7
DOIs
Publication statusPublished - Mar 2014

Keywords

  • residual/internal stress
  • autoclave
  • Polymer-matrix composites
  • finite element analysis
  • TOOL-PART INTERACTION
  • THERMOSETTING COMPOSITE
  • LAMINATED COMPOSITES
  • RESIDUAL-STRESSES
  • SPRING-IN
  • CURE
  • COMPONENTS
  • DISTORTION
  • WARPAGE

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