DETERMINATION OF CHARACTERISTIC STRESSES ON TUBES OF ALUMINUM ALLOYS. PART II. TESTS AND TEST READINGS.
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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A simple method is proposed for the determination of the tangential characteristic stresses in tubes of aluminum alloys. The tube sections are split parallel to the longitudinal axis and gradually machine turned externally or internally, wherein the value of the tangential characteristic stresses can be computed from the variation in the width of the split. The longitudinal characteristic stresses are determined from the variation of the transverse bending in the removal of slender strips taken away in a longitudinal direction. In the first part of this work, the equations required for the stress measurements were developed and discussed in detail. The comparative measurements conducted in the present second part by the application of this method and the G. Sachs method lead to results that are in agreement. The dependence of the measured results on the length of the test piece was investigated. Finally the effect of various quenching conditions, the effect of heat treatment and cold deformation, on the type and magnitude of the characteristic stresses of tubes of A1ZnMgCu0.5 and A1Mg3 are presented by means of several examples. Author
- Metallurgy and Metallography
- Pumps, Filters, Pipes, Tubing, Fittings and Valves