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Alexander Engineering Design uses both analytical, equation based calculations as well as finite element methods to provide robust solutions to clients project requirements.  We are happy to discuss the merits associated with each type of solution.

The computer code used by us for the finite element analyses is well tried and tested and is used by a number of large corporates such as Boeing , NASA  and ALSTOM. We can provide output in a number of formats depending upon the client’s desired objectives.

A wide range of element types, constraint and loading conditions are available.  These allow us to tailor our approach to best effect and to cover both single component, single material cases through to multi-component, multi-material situations.  We will provide the most appropriate element type and loading scheme after discussions with the client.

A large number of element types are available, the most commonly used being : BEAM, ROD, PLATE, MEMBRANE  and  SOLID as well as MASS, SPRING  and CONTACT

Constraints can be defined on all, or any of the six structural degrees of freedom at any node or by defining temperatures for thermal analysis at nodes.

Mechanical loading can be applied nodally or elementally, with typically FORCES, MOMENTS OR PRESSURE.  Body loads such as those generated by body rotation, either constant or accelerating can be applied, as can gravitational, or constant linear loading.

A number of thermal load types can be applied, including TEMPERATURE, HEAT GENERATION, THERMAL FLUX, and  CONVECTIVE.  RADIATION loads can also be provided for.

Material properties can either be supplied by the client or by using values from standard literature.  Linear property data for mechanical analyses is most frequently used, although non-linear material property can be handled.  Thermal property data may be either constant or temperature variable depending on the particular requirements.

Alexander Engineering Design can provide assistance and advice in any of these cases to ensure an appropriate set of input data is provided.

Mechanical analysis can range from simple static beam stressing, through to multicomponent fully 3-D solid model static stressing.  Buckling analyses can also be undertaken.

Thermal analyses can be either static or transient in form.

Output plots can be provided in a number of  file types, or can be provided as JPEG or BMP (bitmap) images of  the contour plots. 

The mechanical stress outputs can be of any of the standard types, e.g. principle, von Mises, plate(side1/side2) etc.  Section cuts are available for solid element models with appropriate contour plots.

Thermal analysis outputs can be either temperature or thermal flux.  Section cuts are again available for solid models.  Time transient results can be provided as MPEG movies to show the motion of the temperature field during the transient.

Electric Field analysis is currently limited to static only.  Permittivities for the dielectrics are input together with the equipotential surfaces in the model.  Fully 3-D solid models are possible.  Output is in the form of isoelectric contours superimposed on the model.  Examination of the electric field gradient together with dielectric withstand data allows detailed design checks to be made.