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Information Journal Paper

Title

Thermal Variations of Thermo-Mechanical Loading Effects on Creep Stress and Strain Distribution in Multi-layered Composite Cylinder

Pages

  115-123

Abstract

 In this research, Thermal variation and internal pressure effects on stresses and strains of the creep behavior of composite laminates are investigated. Schapery's viscoelastic approach as a nonlinear model is used by Prandtl‐Reuss theory and Mendelson's approximation to explain the stress/strains creep treatment. History of the radial, circumferential, and axial creep stresses and strains of a laminated composite cylindrical shell made of the E-glass/Vinylester laminated composites are studied and examined. Different laminated sequences of lay-ups, linear variation of thermal loading, various composite materials accomplished with internal pressure loading are investigated. For this purpose, two laminated lay-ups as [[010/4510/010/4510 ] and [010/9010/010/9010 ] are selected, and Schapery integral nonlinear viscoelastic model of creep stress and strain approach for the constitutive equation is used. It was believed that the circumferential creep strain and absolute values of axial and radial creep strains are increasing with time and Also, creep stresses/strains in the multilayer composite cross-ply [010/9010/010/9010 ] is more than the [010/4510/010/4510] laminated composite cylindrical shells.

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