An inverse model for the peeling-based recovery of unitary layers from laminated structures

The recycling of composite materials is a major challenge as it is systematically associated, in classical processes involving a mechanical shredding step, with a downcycling due to the reduction of the fiber length. However, recent works demonstrated that the recovery of the unitary layers of lamin...

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Bibliographic Details
Main Authors: Becker, Moritz, Imbert, Mathieu, May, Michael
Format: Conference Proceeding
Language:English
Subjects:
Composite materials
Damage
Laminates
Mathematical models
Mechanical properties
Numerical models
Peeling
Separation
Shredding
Substrates
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Summary:The recycling of composite materials is a major challenge as it is systematically associated, in classical processes involving a mechanical shredding step, with a downcycling due to the reduction of the fiber length. However, recent works demonstrated that the recovery of the unitary layers of laminated structures with preserved mechanical properties is possible under dedicated loading conditions. This requires that the fibrous reinforcement is not damaged during the peeling recovery process. An innovative inverse numerical model is proposed, which enables to directly compute the magnitude and orientation of the loads leading to layer separation without damaging the fibrous reinforcement. Separation of the peeled layer from the substrate is modeled using a discretized two-layer model with cohesive zone described by a set of equations, which is solved numerically. Different approaches are finally proposed taking into account the bending-induced damage of the peeled layer, in order to realize accurate predictions even in the cases in which damage cannot be avoided.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0163191