Design Development and Durability Validation of Postbuckled Composite and Metal Panels. Technology Assessment.
Abstract
The objective of this ongoing program is to develop design procedures and life prediction methods for curved metal and composite panels designed to operate in the postbuckling regime under the action of combined compression and shear loads. In Task I of the program, the available data base was critically examined to assess the durability and damage tolerance of postbuckled structures. In this technology assessment, data relevant to the effects of combined loads, reversed loads, environment, spectrum fatigue, defects, repair methods, and stiffener attachment methods on the durability of postbuckled panels were collected and analyzed. The results were used to identify the data gaps that need to be filled and the tests that need to be performed in the program. In this report, the technology assessment and the data gaps are documented. From the technology assessment presented in this report, it is shown that the durability and damage tolerance of postbuckled composite panels are of no concern for operating strain levels of 2500 microinch/in to 3000 microinch that are typical of stiffness critical designs. Metal panel fatigue life was found to be considerably lower than for composite panels designed to the same loading conditions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1985
- Accession Number
- ADA171077
Entities
People
- R. B. Deo