Modelling and quantifying mode I interlaminar fracture in particle-toughened CFRP materials

G. Borstnar, M. N. Mavrogordato, Qingda Yang, I. Sinclair, S. M. Spearing

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Four-dimensional time-resolved Synchrotron Radiation Computed Tomography (SRCT) has been used to capture Mode I delamination propagation in particle-toughened Carbon Fibre Reinforced Polymers (CFRPs). Digital Volume Correlation (DVC) was used in order to measure ply opening displacements at the crack tip, permitting the interlayer strain ahead of the crack tip to be quantified. Estimates at which toughening particles de-bonded and/or fractured were made, giving insight into the effects of particle type and particle size on the fracture mico-mechanisms. The experiments are complemented by a 2D plane-strain finite element (FE) model, which investigated the effects of particle strength and toughness on the ply opening displacement and crack path by modelling the particles as 1D cohesive segments. Previous work has shown that Mode I crack propagation in particle-toughened interlayers involves a process zone rather than a distinct crack tip. Therefore, Augmented Finite Element Method (A-FEM) elements were used in the simulation, since the elements can account for both bifurcating and merging cracks within a single element. The nodal displacements in the simulation were compared to the DVC results, illustrating a potential path through which more complex FE simulations may be validated against experimental results in the future.

Original languageEnglish (US)
Title of host publicationECCM 2016 - Proceeding of the 17th European Conference on Composite Materials
PublisherEuropean Conference on Composite Materials, ECCM
ISBN (Electronic)9783000533877
StatePublished - 2016
Event17th European Conference on Composite Materials, ECCM 2016 - Munich, Germany
Duration: Jun 26 2016Jun 30 2016

Other

Other17th European Conference on Composite Materials, ECCM 2016
CountryGermany
CityMunich
Period6/26/166/30/16

Fingerprint

Crack tips
Carbon fibers
Polymers
Cracks
Toughening
Synchrotron radiation
Merging
Delamination
Toughness
Tomography
Crack propagation
Particle size
Finite element method
carbon fiber
Experiments

Keywords

  • Augmented finite element method
  • Delamination
  • Digital volume correlation
  • Polymer matrix composites
  • Synchrotron radiation computed tomography

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Borstnar, G., Mavrogordato, M. N., Yang, Q., Sinclair, I., & Spearing, S. M. (2016). Modelling and quantifying mode I interlaminar fracture in particle-toughened CFRP materials. In ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials European Conference on Composite Materials, ECCM.

Modelling and quantifying mode I interlaminar fracture in particle-toughened CFRP materials. / Borstnar, G.; Mavrogordato, M. N.; Yang, Qingda; Sinclair, I.; Spearing, S. M.

ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials. European Conference on Composite Materials, ECCM, 2016.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Borstnar, G, Mavrogordato, MN, Yang, Q, Sinclair, I & Spearing, SM 2016, Modelling and quantifying mode I interlaminar fracture in particle-toughened CFRP materials. in ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials. European Conference on Composite Materials, ECCM, 17th European Conference on Composite Materials, ECCM 2016, Munich, Germany, 6/26/16.
Borstnar G, Mavrogordato MN, Yang Q, Sinclair I, Spearing SM. Modelling and quantifying mode I interlaminar fracture in particle-toughened CFRP materials. In ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials. European Conference on Composite Materials, ECCM. 2016
Borstnar, G. ; Mavrogordato, M. N. ; Yang, Qingda ; Sinclair, I. ; Spearing, S. M. / Modelling and quantifying mode I interlaminar fracture in particle-toughened CFRP materials. ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials. European Conference on Composite Materials, ECCM, 2016.
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