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Additional info for Engineering Analysis using PAFEC Finite Element Software

Example text

In our case since we are in two dimensions we will not need the Z header. NUMBER header since the default value is 1, signifying Cartesian coordinates. 0 Note that the positioning of the axes is implicit in our definition of the nodes. NUMBER. By default the numbering starts at 1 and increments by 1 with each new data line. 2 The ELEMENTS module Having defined the outline of the structure we can now turn our attention to the specification of the finite elements to be used in the analysis. Bearing in mind the assumptions inherent in our model and the type of analysis required, the element type is chosen from the range described in the Data Preparation Manual.

The axes module provides for definition of a coordinate system other than the default options of Cartesians. For some problems, for example applications involving cylindrical shells, it may be more convenient to define nodes in a polar coordinate system. It is for the user to ensure that through the choice of appropriate modules the model is faithfully represented to the PAFEC-FE program. Although the specification of individual modules must conform to specified rules, the order in which they are arranged in the data set is optional.

Having obtained the primary unknowns in Phase 7, the PAFEC-FE program now proceeds to calculate the secondary unknowns, typically the stresses. The results are tabulated. Phase 10: drawings of results. Another drawing phase for which the results from Phase 9 are used. 4 shows the stress contours in the plate. 4 Types of analysis available The PAFEC-FE program provides for various types of analysis. Often it will be the type of data modules present in the data set which will determine the type of analysis rather than any specific instruction in the control module.

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