Innovative Space Materials and Structures
Abstract
A primary objective of this Phase I study was to identify and characterize monolithic deployable truss architectures that are conducive to efficient packaging by means of elastic material straining. To meet this objective, elastically deployable-latticed structures based on rod-like flexible elements were studied in two independent analytical investigations. In the first, robust optimization tools were developed and used to calculate the dimensions of lightest weight trusses subjected to bending strength and stiffness requirements. This investigation revealed that even with element straightness imperfection effects included, gossamer space structures (those with high stiffness and low strength requirements) optimally employ very slender elements. Gossamer space structures (structures to which MEDLS technology is directly applicable, such as support structures for membrane optics, satellite decoy support structures, solar sails, sunshields and mesh/wire antennas) have optimal slenderness (element length/diameter ratio, L/d) as high as 400. This is an order of magnitude greater than contemporary space-based deployable structures. In the second study, several structural architectures were considered and evaluated using non-linear finite element analyses for elastic packaging geometry and performance.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 14, 2003
- Accession Number
- ADA417248
Entities
People
- Jason Hinkle
- Thomas Murphey