TY - CONF
T1 - Interlaminar toughening mechanisms
T2 - 20th International Conference on Composite Materials, ICCM 2015
AU - Borstnar, G.
AU - Mavrogordato, M. N.
AU - Yang, Q. D.
AU - Sinclair, I.
AU - Spearing, S. M.
N1 - Funding Information:
The authors acknowledge contributions from institutions and staff: Cytec Industries Ltd. for their sponsorship and materials supply, and the support from Dr. Kingsley Ho as the technical point of contact. The μ-VIS centre at the University of Southampton for provision of tomographic imaging facilities, supported by EPSRC grant EP-H01506X, and the support from Dr. Richard Boardman and Dr. Neil O’Brien. The support from researchers Derek Schesser and Bao-Chan Do from the Univeristy of Miami. Additionally, the authors acknowledge support from Dr. Peter Modregger at the Swiss Light Source and funding from the Community's Seventh Framework Programme (FP7/2007-2013) under grant agreement n.°312284 (for CALIPSO).
PY - 2015
Y1 - 2015
N2 - Micromechanistic simulation of constrained interlaminar fracture occurring during delamination of toughened materials has received limited attention within the polymer composites community. With recent advances in computational resources and the development of arbitrary cracking models, such as the Augmented Finite Element Method (A-FEM), more complex microstructures can now be tackled featuring multiple interacting cracks. It has been established that Mode I crack propagation in particle-toughened interlayers within a CFRP laminate involve a process zone rather than a distinct crack tip. This involves multiple cracks forming ahead of the main crack that then coalesce, leaving behind bridging ligaments that may then provide traction across the crack flanks. Preliminary idealised 2D AFEM models are presented in this work, that highlight the relative role of neat resin to ply interface cohesion, and the incidence of 'idealised de-bonds'/discontinuities, in maintaining the crack path within the interlayer. Four-dimensional time-resolved computed tomography (CT) experiments complement the idealised models, with the chronology of damage events and resultant crack paths being directly identified in different toughened microstructures.
AB - Micromechanistic simulation of constrained interlaminar fracture occurring during delamination of toughened materials has received limited attention within the polymer composites community. With recent advances in computational resources and the development of arbitrary cracking models, such as the Augmented Finite Element Method (A-FEM), more complex microstructures can now be tackled featuring multiple interacting cracks. It has been established that Mode I crack propagation in particle-toughened interlayers within a CFRP laminate involve a process zone rather than a distinct crack tip. This involves multiple cracks forming ahead of the main crack that then coalesce, leaving behind bridging ligaments that may then provide traction across the crack flanks. Preliminary idealised 2D AFEM models are presented in this work, that highlight the relative role of neat resin to ply interface cohesion, and the incidence of 'idealised de-bonds'/discontinuities, in maintaining the crack path within the interlayer. Four-dimensional time-resolved computed tomography (CT) experiments complement the idealised models, with the chronology of damage events and resultant crack paths being directly identified in different toughened microstructures.
KW - Augmented finite element method
KW - CFRPs
KW - Computed tomography
KW - Interlaminar toughness
KW - Particle-toughening
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M3 - Paper
AN - SCOPUS:85053138627
Y2 - 19 July 2015 through 24 July 2015
ER -