Effects of Magnetic Field in Creep Behavior of Three-Phase Laminated Composite Cylindrical Shells

Abstract

Due to the importance effect of magnetic field on the history of long-term radial and circumferen-tial creep strain and radial displacement for a three-phase nano-composite exposed to an internal pressure and placed uniform temperature, the present article subject has been proposed. Three-phase nano-composite made of single-walled carbon nano tubes (SWCNTs)/ glass fiber (GF)/vinylester used to micromechanical models in order to calculate the mechanical and ther-mal properties. By assuming non-linear viscoelastic based on Schapery integral model and using classical laminate theory, Prandtl-Reuss relations and Mendelson’s approximation method achieved results. Distribution of the radial creep strain, circumferential creep strain and radial displacement in two states including without and with magnetic field and three temperature conditions for laminated lay-ups [0/45/0/45] described for 10 years. The results indicate that the magnetic field has reduced the radial and circumferential creep strain and radial displace-ment. Furthermore, the temperature increase in the magnetic field is less effective on the in-creased values of creep strain and radial displacement. Finally, It has been founded that magnetic field would reduce the creep strain of all case studies.