THERMAL STRESSES IN OGIVAL RADOMES WITH TEMPERATURE-DEPENDENT MATERIAL PROPERTIES
Abstract
The solution that is developed herein can be used to compute thermal stresses and displacements in the moderately thick walls of appreciably curved ogival shells whose material properties change with heat intensity along the span and through the wall. No restriction is placed on temperature dependent variations of the thermal stress expression. Three examples of the computerized results are presented. The first example deals with a 28.3 in. x 6.75 in. bicentric-ogive radome; the second, with a thick-walled hemispheric radome; and the third, with a thin-walled hemisphere. In these calculations, linear spanwise temperature distributions are used that were obtained from experimental and heat-transfer analyses of a radome tested in a wind tunnel. Through the wall, over specified layers, the thermal-strain function is approximated as being linear with temperature. However, the temperature varies as a third-order nonlinear function through the thickness of the wall as found for the test radome. It appears that errors due to the approximation amount to less than four percent in general.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1969
- Accession Number
- AD0696063
Entities
People
- Manford B. Tate
Organizations
- Johns Hopkins University