Residual stresses in rubber formed thermoplastic composites

Sebastiaan Wijskamp, E.A.D. Lamers, Remko Akkerman

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

128 Downloads (Pure)


The rubber pressing process is applied for the rapid production of thermoplastic composite products. However, rubber pressed products show geometrical distortions, such as warpage, due to processinduced residual stresses. An experimental study is performed to measure the curvature after rubber pressing of initially flat woven fabric glass/poly(phenylenesulphide) composite panels. A material model is proposed that incorporates the solidification of the composite in order to predict the residual stresses and the warpage due to inhomogeneous cooling. The model is employed in finite element simulations of the rubber pressing process. The simulations are compared to the experimentally obtained curvatures. It shows that unbalanced cooling has a minor effect on the warpage in this case. It is demonstrated that transverse shear loading of the composite during consolidation, for example by a non-flat rubber tool, results in warpage-inducing residual stresses.
Original languageUndefined
Title of host publicationProceedings of the 6th International ESAFORM Conference on Material Forming
EditorsV. Brucato
Place of PublicationSalerno, Italie
Number of pages4
Publication statusPublished - 2003
EventESAFORM 2003: 6th International ESAFORM Conference on Material Forming - Salerno, Italy
Duration: 28 Apr 200330 Apr 2003
Conference number: 6


ConferenceESAFORM 2003
Abbreviated titleESAFORM


  • IR-59439
  • METIS-217353

Cite this