On the durable critic load in creep buckling of viscoelastic laminated plates and circular cylindrical shells |
| |
Authors: | Fan Peng YiMing Fu YiFan Liu |
| |
Institution: | 1.College of Mechanics and Aerospace,Hunan University,Changsha,China |
| |
Abstract: | Based on the first order shear deformation theory and classic buckling theory, the paper investigates the creep buckling behavior
of viscoelastic laminated plates and laminated circular cylindrical shells. The analysis and elaboration of both instantaneous
elastic critic load and durable critic load are emphasized. The buckling load in phase domain is obtained from governing equations
by applying Laplace transform, and the instantaneous elastic critic load and durable critic load are determined according
to the extreme value theorem for inverse Laplace transform. It is shown that viscoelastic approach and quasi-elastic approach
yield identical solutions for these two types of critic load respectively. A transverse disturbance model is developed to
give the same mechanics significance of durable critic load as that of elastic critic load. Two types of critic loads of boron/epoxy
composite laminated plates and circular cylindrical shells are discussed in detail individually, and the influencing factors
to induce creep buckling are revealed by examining the viscoelasticity incorporated in transverse shear deformation and in-plane
flexibility. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|