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A consistent finite element formulation for laminated composites with nonlinear interlaminar constitutive law
فرمولاسیون عنصر محدود سازگار برای کامپوزیت های چند لایه با قانون سازنده interlaminar غیرخطی-2020 We introduce a consistent displacement‐based finite element formulation for the analysis of laminated composites
with nonlinear interlaminar constitutive law. The computational model includes the nonlinear Reissner
beam for modelling the bulk material and continuously distributed system of nonlinear springs to describe
the connection between layers. We can introduce general functions for describing the stiffness of springs.
Therefore, our model is able to describe a variety of physical phenomena, such as friction between layers, contact,
cohesive forces, etc. The displacement field on which the stiffness function depends upon is expressed in a
local, deformed basis. Distributed force which results from the interaction between layers, is introduced into
the governing equations in order to avoid the need for additional interface elements and to simplify the numerical
solution method. Precise experiments on thick partially delaminated beam, solid beam, shear lap joint
beams and film‐substrate composite as well as comparison with the results from the literature, demonstrate
the efficiency and versatility of the proposed numerical procedure. Keywords: Composite Reissner beam | Cohesion zone | Contact | Interface | Delamination |
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