Finite Element Analysis (FEA)

 

Finite Element Analysis (FEA) is a computer simulation technique used in engineering analysis. It uses a numerical technique called the finite element method (FEM).

In its application, the object or system is represented by a geometrically similar model consisting of multiple, linked, simplified representations of discrete regions—i.e., finite elements on an unstructured grid. Equations of equilibrium, in conjunction with applicable physical considerations such as compatibility and constitutive relations, are applied to each element, and a system of simultaneous equations is constructed. The system of equations is solved for unknown values using the techniques of linear algebra or nonlinear numerical schemes, as appropriate. While being an approximate method, the accuracy of the FEA method can be improved by refining the mesh in the model using more elements and nodes.

A common use of FEA is for the determination of stresses and displacements in mechanical objects and systems. FEA is able to handle complex systems that defy closed-form analytical solutions.

FEA used for predictive behaviour of elastomer seals

FEA helps the designer to address complex seal geometries, where assessing the sealing force is difficult, both intuitively and to calculate manually.

The use of such predictive behavioural programmes can be highly beneficial across a wide range of applications for elastomer seals. Many real-life tests involve complex set-ups, downtime on machinery or expensive laboratory time. The use of FEA may eliminate or at least accelerate the testing programme and is highly likely to be a more cost effective method in assessing the viability of introducing or changing a seal design.

Hygienic sealing using FEA