Engineering Models and Computer Codes

Abstract

The issue of analyzing a complex problem in mechanics is discussed and the possible calculation methods are reviewed. The relatively easy access and use of general‐purpose computer codes might be very attractive; however, the unqualified user may be surprised by the presence of many pitfalls, some of which are shown through examples. When computer codes are examined in a wider perspective, as in the examples, the results might be confusing so as to motivate for further studies. On the other hand, an engineering model is specially derived for a certain problem, and the simplifying assumptions are based on a deep understanding of the phenomenon. Thus, both sensitivities of the physical phenomenon and general trends of behavior may be obtained from an engineering model, as well as detailed results of response in a quick and efficient way. The power of engineering models is shown through examples and their special features and advantages are discussed.