viscoelastic materials. Finally several invented cases are run to illustrate the importance
of the viscoelasticity phenomenon on the internal stress field throughout thick laminated
cylinders.
KEYWORDS: Polymer–matrix composites (PMCs); Creep; Elasticity; Analytical

modelling; Durability.

INTRODUCTION
The hollow cylinders or cylinders are very common structural elements, used in many
applications including trusses, hoses, piping systems and drive shafts. The effort to
improve oil production riser performance lead to the possible use of risers made of
polymer matrix composites to bring the oil to surface platforms in the offshore
exploration at waster depth of 2 km or more. Consequently the increasing use of

polymer matrix composites in civil engineering applications has renewed interest in

این مطلب را هم بخوانید :

problems of stress analysis of cylindrical laminated composite structures.
Many analytical works about stress analysis of composite cylindrical shells have been
done during the past years. This is related with the increase use of composite shells in
many applications, such as civil engineering structures and aeronautical industry. The
4