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Improved accuracy for finite element structural analysis via a new integrated force method
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Aiello, Robert A. Patnaik, Surya N. Hopkins, Dale A. Berke, Laszlo |
| Copyright Year | 1992 |
| Description | A comparative study was carried out to determine the accuracy of finite element analyses based on the stiffness method, a mixed method, and the new integrated force and dual integrated force methods. The numerical results were obtained with the following software: MSC/NASTRAN and ASKA for the stiffness method; an MHOST implementation method for the mixed method; and GIFT for the integrated force methods. The results indicate that on an overall basis, the stiffness and mixed methods present some limitations. The stiffness method generally requires a large number of elements in the model to achieve acceptable accuracy. The MHOST method tends to achieve a higher degree of accuracy for course models than does the stiffness method implemented by MSC/NASTRAN and ASKA. The two integrated force methods, which bestow simultaneous emphasis on stress equilibrium and strain compatibility, yield accurate solutions with fewer elements in a model. The full potential of these new integrated force methods remains largely unexploited, and they hold the promise of spawning new finite element structural analysis tools. |
| File Size | 1965124 |
| Page Count | 30 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920012984 |
| Archival Resource Key | ark:/13960/t9z08202s |
| Language | English |
| Publisher Date | 1992-04-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Solid Mechanics Stiffness Matrix Measure and Integration Cantilever Beams Flexibility Computer Programs Convergence Finite Element Method Stress-strain Relationships Mathematical Models Stiffness Nastran Compatibility Plates Structural Analysis Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
