Users want to know: How well does your finite element analysis software predict the response of a physical system to an applied load? A comparison is made to test data if available, or benchmark solutions (e.g. classical methods, text books).
|ESRD provides with the StressCheck software a Handbook Library of parametrically defined models for comparison to published solutions from Timenshenko, Peterson, Mura, Tada, Blevins, Roark, et al. If there are differences, do they result from the mathematical model (in this case an approximation using the finite element method) or are they the result of errors in idealization (boundary conditions, material properties, etc.)?
StressCheck is the only FEA software tool on the market that provides feedback to the user regarding the quality of the computed information. This 'verification' process assesses the sensitivity of the computed data to changes in the mesh density, order of the element shape functions, and element mapping. Verification is an important first step in validating the model.
It is clear that validation can only be achieved if verification of the data of interest has been completed. For more information on CAE Handbook terminology, click here.
- Verification - Am I solving the equations right?
- Validation - Am I solving the right equations?
|General guidelines pertaining to the use of mathematical models in solid mechanics were issued by the American Society of Mechanical Engineers (ASME) in 2006 and adopted by the American National Standards Institute. This document describes the importance of verification and validation.