INVESTIGATION OF THE COMPRESSIVE, BEARING, AND SHEAR CREEP-PUPTURE PROPERTIES OF AIRCRAFT STRUCTURAL METALS AND JOINTS AT ELEVATED TEMPERATURES

摘要

The determination of the high-temperature mechanical properties of aircraft structural materials is a prerequisite to efficient design when elevated temperature service is to be expected. Normally these properties are obtained from the conventional short-time tensile and creep-rupture tests and as such are not necessarily applicable for stress conditions other than tension. The present program was conducted to examine the high-temperature strength and deformation characteristics of two high-strength airframe alloys when exposed independently to a variety of stresses under both short and long time loading. Specifically the object of the program was to determine the high-temperature tension, compression, bearing and shear properties of selected airframe alloys with the ultimate purpose of correlating tension behavior with behavior under the various other types of loads and also of applying these basic data to predict the behavior of riveted joints undergoing creep deformation in tension, bearing and shear.