ISSN: 0884-6804
Page Count: 7

Viscoelastic Modeling of Press-Fitted Composite Cylinders
Tzeng, JT
U.S. Army Research Laboratory, Weapons and Materials Research Directorate, MD

(Received 10 June 1999; accepted 24 July 2000)

Abstract

Interference stress is an important design factor for press-fitted cylinder applications such as flywheels and pressure vessels, which may decrease over a period of time. Stress relaxation and creep in press-fitted composite cylinders are investigated based on anisotropic viscoelasticity. The analysis accounts for ply-by-ply variation of material properties and fiber orientations through the thickness of cylinders. Viscoelastic characteristics of press-fit composite assemblies are quite different from those of isotropic cylinders, due to the extreme anisotropy of composite materials. Results show a significant change of interference stresses over a period of time, which is critical to structural performance and durability.

Keywords:
interference stress, anisotropy, viscoelasticity

Paper ID: CTR10909J
DOI: 10.1520/CTR10909J
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