Finite element analysis

Initial finite element work at Stresscraft was devoted to the evaluation of coefficients for relating residual stresses to surface strains for the centre hole drilling method.

Analysis was carried out with Algor software using 2-D and 3-D models to relate sub-surface residual stresses to surface displacements integrated over the active gauge area.

Coefficients for strain-to-stress calculations in the 'integral method' have been evaluated for a matrix covering 3 sets of drilled hole diameters, 8 sets of hole depths, up to 8 sets of stress depths, and 2 types of stress field (equal biaxial and pure shear).  

This requires a total of 216 models.  Each model produces a unique surface displacement map.

Stresscraft Ltd now performs finite element analysis for a number of engine manufacturers using Algor software.

Modules include linear-elastic and non-linear stress analysis, thermal analysis and modal analysis in addition to a general 'mechanical event' analysis program.

A number of meshing facilities are available to suit the analysis and model detail requirements and the customer's form definition. 

Recently analysed components include connecting rods, engine blocks, cylinder housings, rocker levers and cam followers, manifolds, fuel lines, etc.

Most models are meshed in eight -  noded brick elements.  A number of gap element alternatives are available at component interfaces.

Results outputs include principal stresses, stress tensors, Von Mises stress, strains, displacements, gap separation, temperatures, mode shapes, etc.  

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