Author: John R. DavidsonPublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 42
Book Description
Optimum Design of Insulated Tension Members Subjected to Aerodynamic Heating
Author: John R. DavidsonPublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 42
Book Description
Optimum Design of Insulated Compression Plates Subjected to Aerodynamic Heating
Author: John R. DavidsonPublisher:
ISBN:
Category :
Languages : en
Pages : 60
Book Description
A method to determine the optimum thicknesses of insulation and load-carrying structure has been applied to insulated compression plates subjected to aerodynamic heating. The optimum design results in the lowest combined weight of insulation and load-carrying plate. Load parameters which included the imposed load, insulation conductivity and density, and flight time were found for design strength criteria of compressive yield, compressive buckling, and postbuckling failure. Charts of optimum total weight were prepared for 2024-T3 aluminum alloy, HK3lA magnesium alloy, 17-7 PH stainless steel, and Inconel X for each design criterion. The results show that 17-7 PH stainless steel and Inconel X are most efficient for compressive yield stress and that HK3lA magnesium is most efficient for buckling. HK31A magnesium is also most efficient for the postbuckling failure criterion except under conditions of light loading and long flight periods; under such conditions uninsulated Inconel X may be superior for environmental temperature less than 1,200 F. Insulated magnesium is more efficient than insulated aluminum because the lower density of magnesium permits the use of thick plates with large heat capacity. When more than one failure mode was applied to a design, it was found that the minimum weight structure was one in which all modes of failure occurred at the design load.
NASA Technical Note
Author: Methods for Determining the Optimum Design of Structures Protected from Aerodynamic Heating and Application to Typical Boost-glide Or Reentry Flight Paths
Author: Robert S. Harris (Jr.)Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 42
Book Description
General equations are developed for the design of efficient structures protected from thermal environments typical of those encountered in boost-glide or atmospheric-reentry conditions. The method is applied to insulated heat-sink stressed-skin structures and to internally cooled insulated structures. Plates loaded in compression are treated in detail. Under limited conditions of plate buckling, high loading, and short flight periods, and for aluminum structures only, the weights of both configurations are nearly equal. Load parameters are found and are similar to those derived in previous investigations for the restricted case of a constant equilibrium temperature at the outside surface of the insulation.
Monthly Catalog of United States Government Publications
Author: United States. Superintendent of DocumentsPublisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1812
Book Description
APL Technical Digest
Author: Applied Mechanics Reviews
Author: Monthly Catalog of United States Government Publications, Cumulative Index
Author: United States. Superintendent of DocumentsPublisher:
ISBN:
Category : United States
Languages : en
Pages : 1300
Book Description
Author: 
Author: