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Unformatted text preview: nded for solving practical engineering problems. Many theoretical problems are not
realistic in that the assumptions necessary to obtain a closed-form analytical solution make the mathematical
model depart from a practical application problem. Examples of these assumptions are: step force changes, step
temperature changes, perfectly plastic impacts, infinitely rigid supports, etc. Imposing these conditions in a finite
element analysis often requires more effort to duplicate the theoretical result than would be required to solve
the "real world" problem.
Theoretical solutions are generally based on a continuous or differential approach. In some cases, an exact
comparison with a finite-element solution would require an infinite number of elements and/or an infinite
number of iterations separated by an infinitely small step size. Such a comparison is neither practical nor desirable.
The examples in this manual have been modeled to give reasonably accurate comparisons ("engineering accuracy")
with a low number of elements and iterations. In some cases, even fewer elements and/or iterations will sti...
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- Spring '09
- The Land