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Numerical simulation of resin flow

For process designers, sophisticated and validated numerical simulations are now commercially available to describe flow in RTM such as LIMS, PAM-RTM and RTM-Worx. These simulations can be very useful and help in cost mitigation by reducing expensive trial-and-error approaches to finalize the process design for successful and reliable manufacturing, especially if the composite part has a complicated geometry, many inserts and varying thickness and permeability. [Pg.295]

If the simulations are used to design the mold and process parameters (injection pressure or flow rate, locations of the gates and vents, and layup of the preform) in which the manufacturing engineer anticipates very small variation in material and layup process, the computational efficiency is not important. For such cases, simulation times of the order of hours or days may be acceptable. However, if the design and process engineer anticipates local variations and would like to address them in the process design, this [Pg.295]

Note The subscripts r and f denote the resin and fiber, respectively. Source From reference 27. [Pg.296]

In the numerical solution of the flow model, Eq. [9.7] and the solution domain are discretized. The part geometry, which is equivalent to the mold cavity, is discretized as a shell mesh in 3D using usually triangular and/or quadrilateral elements in 2D. The most common numerical method is to use a finite element/control volume (FE/CV) approach although boundary element and finite difference methods have been used.  [Pg.296]

Finite element (FE) is used to solve the pressure distribution in the resin-covered subdomain. The pressure within an element e, P is expressed in terms of the unknown nodal pressures, P, of that element as follows  [Pg.296]


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