Accession Number : AD0290300

Title :   PHOTOELASTIC STRESS ANALYSIS OF A PRESSURE VESSEL

Corporate Author : IIT RESEARCH INST CHICAGO ILL

Personal Author(s) : MARINO,R.L. JR. ; RILEY,W.F.

Report Date : 15 NOV 1962

Pagination or Media Count : 1

Abstract : AD-290 300Div. 25, 30, 14U (TISTP/JW) OTS price $10.10Armour Research Foundation, Chicago, Ill. PHOTOELASTIC STRESS ANALYSIS OF A PRESSURE VESSEL. Final rept., 1 July 60-31 Aug 62, by R. L. Marino, Jr. and W. F. Riley. 15 Nov 62, 117p. incl. illus. (Contract DA 11-022-503-ORD-3469) Unclassified report DESCRIPTORS: *Photoelastic materials, *Pressure vessels, *Pipe fitting, Couplings, Stresses, Load distribution, Epoxy resins, Plastics, Polariscopes, Pressure. The complete results of a three phase program conducted to determine stress distributions in a pressure vessel are reported and several redesign versions of the same vessel are presented. The stress determinations were made by using conventional three-dimensional photoelasticity techniques. The loading applied to the models for most of the studies was internal pressure. The results of the analysis of the original vessel indicated that several regions of high tensile stress existed. The stresses in two of these regions (thread relief grooves and keyway) could easily be reduced by incorporating larger radii in the fillets. The highest stresses in the vessel, however, existed in the small fillets at the roots of the sectored threads where major redesign in the form of thread contour changes would be required to effect significant stress reductions. The major portion of t e research in the last two phases of the program was directed toward reducing the stresses in the fillets of these threads. The thread form and root profile which was selected for analysis in the final three-dimensional model was developed in an auxiliary series of two-dimensional studies. Final evaluation in the three-dimensional model indicated that stresses in the sectored threads of the prototype could be reduced by approximately 22% if the recommended design is incorporated. (Author)

Descriptors :   *PHOTOELASTICITY, *PIPE FITTINGS, *PRESSURE VESSELS, COUPLINGS, EPOXY RESINS, LOAD DISTRIBUTION, PLASTICS, POLARISCOPES, PRESSURE, STRESSES

Distribution Statement : APPROVED FOR PUBLIC RELEASE