By C H Woodford
The purpose of this publication is to supply expert engineers and scholars of engineering with a valid operating wisdom of the finite aspect approach for engineering research and engineering layout. This readable textual content will function a advisor either to the strategy, and to its implementation in PAFEC (Program for automated Finite point Calculations) software program.
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Extra resources for Engineering Analysis using PAFEC Finite Element Software
Although it is impossible to lay down hard and fast rules there are guidelines based on experience built into the PAFEC-FE program. For all elements, the program calculates the ratio of the longest side to the shortest side. If that ratio is ever greater than 15:1 an error message appears and execution is terminated. If the ratio is less than 15:1 but greater than 5:1 a warning is given. In a similar manner the program calculates the angles between adjacent sides of elements. If an angle is ever less than 15° or greater than 165° an error message appears.
N1 refers to the side of the block formed by the 1st and 2nd nodes of the topology, in this example nodes 10 and 12, whilst N2 refers to the side formed by the 1st and 3rd nodes, in our case the actual node numbers are 10 and 13. The mesh, as described might be achieved by the following modules. 0). LIST 4 3 The numbers 2 and 3 appearing in both the PAFBLOCKS and the MESH modules are for linking purposes and as such have been chosen arbitrarily. LIST header may be used to produce an irregular mesh.
Phase 5: further data drawing. Phase 5 is similar to Phase 3, the only difference being that the boundary conditions evaluated in Phase 4 may now be incorporated and illustrated in the drawings. 3 A PAFEC-FE drawing showing original and deformed shape. the preprocessor stages. Successful completion of Phase 4 implies that the PAFEC-FE program is in a position to proceed to a possible solution of the problem with which it has been presented. Whether or not this problem is an accurate representation of the original problem, or what was thought to be the original problem, is quite another matter and one quite beyond the scope of any present day computer, and possibly any future computer, to decide.