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An energy-equivalent bridging map formulation for modelling delamination in through-thickness reinforced composite laminates
A new multi-scale framework to numerically model the bridging effect in through-thickness reinforced (TTR) composite laminates with zpins is presented. The framework first establishes a library of bridging maps, calculated by a micromechanical semi-analytical constitutive bridging model. For the macro-scale, a tri-linear cohesive law has been developed to model initiation and propagation of the interfacial damage in the presence of z-pins. The cohesive law takes into account the energy dissipated by delamination propagation through the matrix in the interlaminar region, plus the energy contributed by the z-pin bridging up to complete pull-out from the laminate or z-pin failure. The information regarding the failure mode and the consequent dissipated energy comes from the library of bridging maps. The tri-linear cohesive law has been implemented in a user material subroutine of a commercial finite element software. The framework has been validated against experimental data and an excellent correlation has been achieved.
An energy-equivalent bridging map formulation for modelling delamination in through-thickness reinforced composite laminates
A new multi-scale framework to numerically model the bridging effect in through-thickness reinforced (TTR) composite laminates with zpins is presented. The framework first establishes a library of bridging maps, calculated by a micromechanical semi-analytical constitutive bridging model. For the macro-scale, a tri-linear cohesive law has been developed to model initiation and propagation of the interfacial damage in the presence of z-pins. The cohesive law takes into account the energy dissipated by delamination propagation through the matrix in the interlaminar region, plus the energy contributed by the z-pin bridging up to complete pull-out from the laminate or z-pin failure. The information regarding the failure mode and the consequent dissipated energy comes from the library of bridging maps. The tri-linear cohesive law has been implemented in a user material subroutine of a commercial finite element software. The framework has been validated against experimental data and an excellent correlation has been achieved.
An energy-equivalent bridging map formulation for modelling delamination in through-thickness reinforced composite laminates
Melro, A R (author) / Serra, Joel (author) / Allegri, Giuliano (author) / Hallett, Stephen R (author)
2020-10-01
Melro , A R , Serra , J , Allegri , G & Hallett , S R 2020 , ' An energy-equivalent bridging map formulation for modelling delamination in through-thickness reinforced composite laminates ' , International Journal of Solids and Structures , vol. 202 , pp. 153-165 . https://doi.org/10.1016/j.ijsolstr.2020.06.018
Article (Journal)
Electronic Resource
English
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