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This investigation presents a methodology for the characterisation of thermoplastic composite materials under rapid processing conditions, as is needed for understanding the flow mechanisms in Unidirectional (UD) tapes. A bespoke compaction rig was designed and constructed to carry out a series of high temperature ramp-dwell loading experiments on CF/PPS (Carbon Fibre/Polyphenylene Sulphide) and CF/PEEK (Carbon Fibre/Polyetheretherketone) specimens. Significant deformations were observed above the melting points, where further increases in temperature led to gradually smaller through-thickness displacements and larger in-plane deformations. A phenomenological material model, initially developed for toughened thermosets, was applied, to assess its suitability for predicting the through-thickness behaviour of thermoplastic composites across a range of temperatures and pressures. The modelling approach was then deployed in Finite Element (FE) simulations of the compacted specimens, making use of the extracted parameters from the experimental tests.
|Journal||Composites Part A: Applied Science and Manufacturing|
|Publication status||Published - Oct 2021|
Bibliographical noteFunding Information:
The authors would like to acknowledge the EPSRC (EP/P510427/1) and Rolls-Royce for their support of this research through the collaboration of the Composites University Technology Centre (UTC) at the University of Bristol, the Lightweight Structures & Materials UTC at the Technische Universität Dresden. The model used here was developed through the EPSRC Centre for Innovative Manufacturing in Composites (EP/I033513) “Defect Generation Mechanisms in Thick and Variable Thickness Composite Parts - Understanding, Predicting and Mitigation” (DefGen) project and the EPSRC platform grant “SIMulation of new manufacturing Processes for Composite Structures (SIMPROCS)” (EP/P027350/1).
© 2021 Elsevier Ltd
- (A) Thermoplastic resin
- (C) Process modelling
- (E) Consolidation
- Finite Element Analysis (FEA)
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1/05/17 → 30/04/22
DefGen: Defect Generation Mechanisms in Thick and Variable Thickness Composite Parts - Understanding, Predicting and Mitigation
1/07/13 → 1/07/17