The Natural Mode Shapes and Frequencies of Graphite Epoxy Cantilevered Plates and Shells.
Abstract
The natural mode shapes and frequencies of graphite/epoxy and graphite/epoxy/aluminum cantilevered plates and cylindrical shell sections are investigated. A single assumed mode partial Ritz analysis is used to determine the frequencies of orthotropic cantilever plates. The results suggest a method for preliminary design and frequency nondimensionalization. The assumed stress hybrid shell element RS40 which includes the effects of transverse shear is used to model a set of laminated cantilevered plates and shells. When this set of plates and shells was then built and tested, the frequencies predicted by RS40 showed reasonable agreement with experimental values, and the predicted and observed mode shapes were in excellent agreement. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1978
- Accession Number
- ADA062582
Entities
People
- Edward F. Crawley
- Sung Won Lee
Organizations
- Massachusetts Institute of Technology