Accession Number : ADA274143

Title :   A Thermal Viscoelastic Analysis for Thick-Walled Composite Cylinders.

Descriptive Note : Final rept. Jan 92-Jan 93,

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Chien, Larry S. ; Tzeng, Jerome T.

Report Date : DEC 1993

Pagination or Media Count : 39

Abstract : The linear quasi-static thermal viscoelastic behavior of a three-dimensional thick laminated composite cylinder is investigated. The cylinder is loaded with a temperature change; however, thermomechanical coupling effects are neglected. The Correspondence Principle is employed to convert the thermoviscoelastic problem to its corresponding thermoelasticity problem in Laplace Transform space. A closed-form formulation is then developed for each layer, assuming a state of generalized plane strain, to solve for a general solution of the corresponding thermoelastic problem. The Laplace Transformed solution is completed by satisfying boundary conditions at the inner and outer surfaces of the cylinder and continuity conditions between adjacent layers. The solution process is expedited by replacing two undetermined coefficients in the assumed form of the thermoelastic solution with the normal stresses at the inner and outer of the cylinder and satisfying the continuity conditions between adjacent layers. Finally, direct Laplace Transform Inversion is used to yield the quasi-static thermoviscoelastic solution. Viscoelasticity, Thick composite cylinders, Laplace transformation

Descriptors :   *LAPLACE TRANSFORMATION, *VISCOELASTICITY, *THERMAL ANALYSIS, *COMPOSITE MATERIALS, *LAMINATES, BOUNDARIES, COEFFICIENTS, CONTINUITY, COUPLINGS, FORMULATIONS, INVERSION, LAYERS, STATICS, STRESSES, SURFACES, TEMPERATURE, THERMOELASTICITY, THREE DIMENSIONAL, YIELD, THICKNESS, WALLS, THERMOMECHANICS.

Subject Categories : Laminates and Composite Materials
      Mechanics
      Thermodynamics
      Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE