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Design, optimization and evaluation of integrally stiffened al 7050 panel with curved stiffeners
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Havens, David Norris, Ashley Bird, R. Keith Kapania, Rakesh K. Olliffe, Robert Slemp, Wesley C. H. |
| Copyright Year | 2011 |
| Description | A curvilinear stiffened panel was designed, manufactured, and tested in the Combined Load Test Fixture at NASA Langley Research Center. The panel was optimized for minimum mass subjected to constraints on buckling load, yielding, and crippling or local stiffener failure using a new analysis tool named EBF3PanelOpt. The panel was designed for a combined compression-shear loading configuration that is a realistic load case for a typical aircraft wing panel. The panel was loaded beyond buckling and strains and out-of-plane displacements were measured. The experimental data were compared with the strains and out-of-plane deflections from a high fidelity nonlinear finite element analysis and linear elastic finite element analysis of the panel/test-fixture assembly. The numerical results indicated that the panel buckled at the linearly elastic buckling eigenvalue predicted for the panel/test-fixture assembly. The experimental strains prior to buckling compared well with both the linear and nonlinear finite element model. |
| File Size | 1803859 |
| Page Count | 44 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20110016508 |
| Archival Resource Key | ark:/13960/t7wm68j74 |
| Language | English |
| Publisher Date | 2011-09-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Finite Element Method Deflection Fixtures Elastic Buckling Nonlinearity Mathematical Models Buckling Wing Panels Failure Loads Forces Design Optimization Load Tests 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 |
