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Improved isoparametric solid and membrane elements
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Vandegrift, R. E. Case, W. R. |
| Copyright Year | 1986 |
| Description | Improvements that were made to the COSMIC NASTRAN elements CIHEX1 and QDMEM1 are described. These elements are isoparametric representations of solid and membrane elastic behavior. Recent papers by the authors have shown the official COSMIC versions of these elements to be inferior to those available in the MacNeal-Schwendler Corporation (MSC) version of NASTRAN in that they are overly stiff for some loadings. Modifications were made to these elements which reduce the order of integration for shear terms and, for the eight-mode solid element, add additional strain functions. The resulting element formulations give behavior similar to that of the MSC elements. The changes made in the element formulations are discussed and results of test problems are compared with results from the official COSMIC elements and with the MSC elements. |
| File Size | 777889 |
| Page Count | 28 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19860016353 |
| Archival Resource Key | ark:/13960/t1gj4ck51 |
| Language | English |
| Publisher Date | 1986-05-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Solid Mechanics Stiffness Matrix Shear Properties Numerical Integration Bending Moments Stress-strain Relationships Membrane Structures Isoparametric Finite Elements Elastic Properties Nastran Gauss Equation Loads Forces 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 | Article |
