Serving the Numerical Simulation community since 1989 
ESRD will be attending AA&S 2017 in Phoenix, AZ from May 22-25. Come visit Gordon and Jason at our booth (119) and attend Jason’s training course “StressCheck + Fracture: Best Practices & Live Demo” on Monday, May 22, 2017 @ 6PM.
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In one of my conference presentations, I discussed variational crimes, noting that using point forces and point constraints in finite element analysis serves as examples of such crimes. In the question-and-answer session, I was asked: “If using point constraints is a variational crime, then how is it possible that the structure designed to refloat the Costa Concordia was full of those crimes and yet it worked just fine.” This question presented an opportunity for me to explain that finite element modeling (FEM) and finite element analysis (FEA) are complementary methods when analysts correctly understand their respective domains of application and use them accordingly. However, problems arise when FEM is used outside its scope, which is an all too frequent error.
Extraction of minimum principal stresses for the aircraft keel beam analysis. Digital Engineering case study results (bottom right) compared well with StressCheck Professional's live dynamic extractions. In recent years, Digital Engineering contributor, NAFEMS instructor and FETraining.net developer Tony Abbey has put together a list of practical engineering simulation case studies, walk-thrus and software overviews for a variety of FEA software tools. Watch as ESRD reproduces a selected set of his 3D detailed stress analysis case studies, and see how we compare with Digital Engineering's published results!
Table 1. Mission-dependence of numerical simulation tasks. Mathematical models have become indispensable sources of information on which technical and business decisions are based. It is therefore vitally important for decision-makers to know whether relying on the predictions of mathematical models is justified. When properly used, numerical simulation can be a major corporate asset. However, it can become a major corporate liability if the reliability of predictions is not guaranteed. Learn more in our latest blog post.
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