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Optimization of stability constrained geometrically nonlinear shallow trusses using an arc length sparse method with a strain energy density approach
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hrinda, Glenn A. Nguyen, Duc T. |
| Copyright Year | 2008 |
| Description | A technique for the optimization of stability constrained geometrically nonlinear shallow trusses with snap through behavior is demonstrated using the arc length method and a strain energy density approach within a discrete finite element formulation. The optimization method uses an iterative scheme that evaluates the design variables' performance and then updates them according to a recursive formula controlled by the arc length method. A minimum weight design is achieved when a uniform nonlinear strain energy density is found in all members. This minimal condition places the design load just below the critical limit load causing snap through of the structure. The optimization scheme is programmed into a nonlinear finite element algorithm to find the large strain energy at critical limit loads. Examples of highly nonlinear trusses found in literature are presented to verify the method. |
| File Size | 480380 |
| Page Count | 37 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20090011260 |
| Archival Resource Key | ark:/13960/t6h180j90 |
| Language | English |
| Publisher Date | 2008-01-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Finite Element Method Stability Flux Density Nonlinearity Critical Loading Design Analysis Loads Forces Trusses Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
