FINITE ELEMENTS
The structure calculus with the Finite Elements Method (FEM) is a computational tool, which lets You analyse and dimensionize correctly the structures, optimizing the design and the material quantity to be used. It is the only method, which makes possible to evaluate the static, dynamic and vibration behaviour of complex structures.
FEM turns a problem defined in terms of differential equations into a matrix problem, providing a correct result for a finite number of points and interpoles the solution to the resto of the domain after, giving finally just one approximate solution. The points collection, where the solution is exact it is called node collection. This node collection becomes a net, it is called mesh compounded of cells. Each cell contained in a mesh is a finite element. The node collection is obtained discretizing the structure (it can be surfaces, volumes and bars).
The most common analysis are:
- Structural analysis it consists of linear and non linear analysis. The linear models use simple parameters and assume, that the material does not become deformed. The non linear models consist of pressing the material much more than its elastic capacities. The pressure on the material is different depending on the deformation.
- Vibrational analysis is used to proof the material behaviour when it suffers vibrations, impacts and crashes. Each one of this incidents might add the material natural frequency and cause failure by resonance.
- Fatigue analysis help the designers to anticipate the material or structure life, showing the effect of the incident. This analysis can show the areas, where a crack could probably appear. The fatigue failure analysis might show also the material failure tolerance.
- Heat transfer analysis lets You calculate the thermal efects of the mechanic behaviour of a structure.