Cryogenic Design Data and Criteria of Aerospace Materials Subjected to Uniaxial and Biaxial Stress States

Abstract

The design of present and future aerospace systems demands that every advantage in a material’s capability be utilized in meeting the weight-strength requirement, Some of the advantages that can be utilized with great benefit are (1) proper choice of materials for the intended use, (2) use of biaxial strength increases when compared to uniaxial strengths, and (3) use of material property values that reflect increases due to the low operating temperature environment, The use of these three basic design advantages will, of course, result in more effective structures with lighter weights and lower cost. However, in order to utilize these advantages with confidence, design test data must be obtained and evaluated. It was the object of this research to evaluate the uniaxial, 1:1 biaxial, and 2:1 biaxial properties of three prospective materials over the temperature range of ambient temperature to — 423°F to obtain the desired design data.