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A triangular thin shell finite element: linear analysis
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Gallagher, R. H. Thomas, G. R. |
| Copyright Year | 1975 |
| Description | The formulation of the linear stiffness matrix for a doubly-curved triangular thin shell element, using a modified potential energy principle, is described. The strain energy component of the potential energy is expressed in terms of displacements and displacement gradients by use of consistent Koiter strain-displacement equations. The element inplane and normal displacement fields are approximated by complete cubic polynomials. The interelement displacement admissibility conditions are met in the global representation by imposition of constraint conditions on the interelement boundaries; the constraints represent the modification of the potential energy. Errors due to the nonzero strains under rigid body motion are shown to be of small importance for practical grid refinements through performance of extensive comparison analyses. |
| File Size | 2786708 |
| Page Count | 47 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19750019357 |
| Archival Resource Key | ark:/13960/t7qp0ww30 |
| Language | English |
| Publisher Date | 1975-07-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Potential Energy Finite Element Method Stiffness Matrix Constraints Thin Walled Shells Strain Energy Methods Polynomials Linear Equations Displacement 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 |
