Finite Element Analysis

We undertake all kinds of finite element analysis ranging from simple linear analysis to complex multi-body contact analysis using non-linear material models.

The latest cutting edge analysis techniques are used to achieve the best possible results for the problem in hand. It is important to remember that the finite element method is an approximation and the quality of the results depends entirely on the chosen loads, boundary conditions and the quality of the meshed model.

For this reason we take the time to construct efficient finite element models using single elements or combinations of elements best suited to the problem. Time spent doing this is usually time well spent because the models provide accurate results and a reduction in computational time.

Here are some examples of our finite element models:

The image on the right shows a 2D axisymmetric model of a load shoulder. This is a revolute part and the applied load is in one direction. The same 2D elements can be used for non revolute parts where the same loads can be applied for a plane stress analysis.  

The surface model on the left is a beer can constructed of 2D shell elements. The element thickness is applied to the model to provide the 3rd dimension and can be changed very quickly. This analysis was conducted using explicit dynamics with a non-linear material model.

On the right is a beam model of a typical DNV offshore container. The model is constructed of line bodies only and the element cross sections assigned to these bodies. This model is very easy to construct and beam models with a large number of sections solve very quickly. This analysis is a four point offshore lift with an eight tonne payload.

On the left is a combined shell and beam sub-model constructed of surfaces and line bodies. The model is that of a drilling template/protective structure base. The solve time for this model is very quick and both shell and beam results can be extracted together.

The image on the right is a stress plot of a high pressure subsea connector body. The elements are high order 3D solid elements and the complete mesh is a pure hexahedral mesh. The stress plot shows results from a combination of bending, tension and internal pressure. The load combinations are the reason a full 3D model was used.