DTIC ADA1032083: Stress Intensity Factors for Radial pdf

DTIC ADA1032083: Stress Intensity Factors for Radial

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Using a finite element method and thermal simulation, stress intensity factors are determined for a uniform array of equal depth radial cracks emanating from the internal boundary of a pressurized, autofrettaged thick-wall cylinder. Computations of the stress intensity factors by methods of load relief and weight function are also examined. The combination of finite elements and weight functions is found very effective and is used in this report for multiple-radial cracks in a partially autofrettaged tube. Extensive numerical results are presented for a cylinder having an external diameter twice that of the internal diameter. It is shown that the autofrettaged tube with two diametrically opposed cracks remains, in general, the weakest configuration. For more than two cracks, the higher the number of cracks is, the smaller the stress intensity factor will be

• Creator/s: Defense Technical Information Center
• Date: 7/1/1981
• Year: 1981
• Book Topics/Themes: DTIC Archive, Pu, S L, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER WEAPON SYSTEMS LAB, *CRACKS, *CYLINDRICAL BODIES, *FINITE ELEMENT ANALYSIS, *FRETTING, *MATHEMATICAL MODELS, *STRESS CONCENTRATION, COMPUTATIONS, CRACKING(FRACTURING), DIAMETERS, EXTERNAL, INTERNAL, SIMULATION, THERMAL STRESSES, THICKNESS, TUBES, WALLS

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