Accession Number : ADA266347


Title :   Thermal Gradient-Induced Deflection of a Thick-Walled Cylinder with Bending Residual Stresses


Descriptive Note : Final rept.


Corporate Author : ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS


Personal Author(s) : Underwood, John H ; O'Hara, G P


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a266347.pdf


Report Date : Apr 1993


Pagination or Media Count : 21


Abstract : The interaction of a thermal gradient with bending residual stresses in a thick-walled cylinder is investigated using experimental measurements from prior work, mechanics analysis, and finite element stress analysis. A temperature gradient is applied to a cylinder containing residual stresses due to plastic bending resulting in transient elastic relaxation of the nonaxisymmetric residual stresses and bending of the cylinder. Analysis of the well-known similar problem in a rectangular bar is done first using solid mechanics solutions of ideal cases. Finite element calculations are made of the residual stresses following plastic bending of a thick-walled cylinder, the effects of a temperature distribution, and the resultant changes in stresses and strains and the associated tube bending. Results from the two approaches for a 200 deg C temperature gradient show a maximum angular displacement of 0.004 to 0.008 deg/m and the displacement returning to zero as the thermal gradient diminishes with time Thermal Gradient, Thermal Stress, Thick-Walled Cylinder, Residual Stress, Finite Element Analysis


Descriptors :   *PLASTIC DEFORMATION , *BENDING , *CYLINDRICAL BODIES , *RODS , MEASUREMENT , STRESS ANALYSIS , INTERACTIONS , FINITE ELEMENT ANALYSIS , TIME , RELAXATION , THICK WALLS , BENDING MOMENTS , TUBES , GRADIENTS , THERMAL STRESSES , YIELD STRENGTH , RESIDUAL STRESS , TEMPERATURE GRADIENTS , SOLIDS , DISPLACEMENT , MODULUS OF ELASTICITY , DEFLECTION , STRAIN(MECHANICS)


Subject Categories : Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE