ME5634 Article-ABCs of FEA.pdf

# ME5634 Article-ABCs of FEA.pdf - The/ABC’s by Gary Beat...

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: The/ABC’s by Gary Beat! First-time users of ﬁnite element software often have the unrealistic etpectation that they will instantly achieve the benefits they see in case studies of other users. This situation may result in disappointment if reliable results are not immediately forthcoming. ' The situation can be minimized by under- standing the nature of ﬁnite element analysis. The total concept may be viewed as a system of filters as shown in the illustration. A real world problem: is to be analyzed. While both essential and non— essential information are available at this Stage to guide the design, the volume of information may be so great that it is often impossible to understand the problem in a form required to provide immediate design guidance This wealth of information is therefore ﬁltered by engineering theory, which allows us to produce a subset of information accepted by the engineering community as a valid mathematical representation of the real world problem This subset is further ﬁltered by. finite element theory in which additional approximations are introduced through a numerical solution of the more exact mathematics of engineering theory The user then describes the input for the ﬁnite element code, introducing me most constraining mm, plug .. I... A 1 Laura, MIC “56"!" 3mm’“? \uxnweliﬁg). Tbs“: qualify, Of the information after this ﬁlter depends on the use of good modeling techniques and how the user describes the most important characteristics of the real world problem. This information is processed by the ﬁnal filter, the ﬁnite element code, which implements the finite element theory. In the end, a rniniscule subset of the original information -—- resultr~ is all that remains to represent the real world problem This is the information used to make judgements regarding the design and integrity of the real world problem If the mos: important chatacreristics are included, the modeling technique is good and a reliable finite element code is used, then the results may be useful. The obVerse is also true: if 12 lessthan’important characteristics are used, or the ﬁnite element code is not reliable, the result is useless information, and wasted time and money. Naturally, the user expects useful results. The critical factors to achieve this goal are known: the most important characreristics; the right modeling technique; and reliable FEA code. Of these, the software supplier has control over only the reliability of the FEA code. The other facrors are the responsibility of the user. Real World Problem Program straw Training and experience are neccssary to model a real world problem properly in a finite element code. The software publisher is expected to oEer sufﬁcient training on the use of the product The training cost is separate from the lease of the software and should be planned and budgeted according to the speciﬁc needs of the user. Experience an only be achieved by using the code and correlating the results with "known results" such as those obtained from testing. When understood and used properly, ﬁnite element analysis can indeed deliver on its promise to help you create a better product in a shorter time span at less cost. ...
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern