The current work is intended to give an overview of issues related to the numerical simulation of adhesive spreading for liquid to semi-liquid adhesives. The advantages and limitations are presented in order to guide the choice of the suitable approach depending on the case under consideration. It is shown that methods are of two categories, whether they are grid-based or meshless. In the first, the movement of the matter is directly dependent on the mesh size and distribution. Contrariwise, in the meshfree methods, the particles are free to move and each carries its properties. Besides, cases of application are presented to provide a database for calculating adhesive spreading with the particulate SPH method. It is shown that it is possible to use simple behaviour laws to win this case. KEYWORDSSpreading < methods of analysis; rheology < methods of analysis; numerical analysis < methods of analysis; bonding < applications; SPH < methods of analysis; fluid mechanics < methods of analysis CONTACT Lorraine Aparecida Silva
The present work has as main objective the proposition of an aeroviscoelastic model of a sandwich panel of three layers, being a base layer, a viscoelastic layer and a constrained layer. In order to analyze the influence of viscoelastic damping treatment in the dynamic response of the system subjected to an unsteady flow. The aerodynamic loading will be calculated using the Doublet Lattice Method (DLM), which allows obtaining the matrix of aerodynamic forces (Q) in the frequency domain and is based on the theory of the assumed modes. In addition, the structural calculation will be performed independently using the finite element method (MEF) coupled with Kirchhoff thin plate theory for the elastic layers, and the Mindlin's theory combined with the fractional derivative model (MDF) for the viscoelastic layer. In the course of the work, the more usual methods for predicting the critical flutter velocity will be described, which together with the spline interpolation method allows coupling the aerodynamic and viscoelastic effects. Finally, the influence of the viscoelastic treatment on an already existing structure will be evaluated, as well as the influence of environmental and operational parameters on the critical flutter velocity.
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