Torsional Contact Between A Flat Annular
Indenter And A Transversely Isotropic Composite
Author(s)
Y. M. Tsai
Abstract
The torsional contact between an annular indenter and a transversely isotropic
material is investigated using the techniques of multiple integral representations
and multiplying factors. The boundary conditions involved have three mixed
parts. The contact shear stress is obtained in exact expressions as the sum of
singular and nonsingular parts. The distributions of the contact stress are
calculated for various values of the ratios of the inner indenter radius a to the
outer indenter radius b. For the same amount of torsional rotation, the level of
the contact stress for a relatively large value of a/b is found to be significantly
higher than that for a small value of a/b. The contact torque is determined from
the contact stress as a function of the ratio between the inner and outer radius of
the indenter. The value of the normalized torque is found to decrease with
increasing value of a/b. The circumferential displacements inside and outside the
contact area are determined as a function of the normalized radial distance and
shown to be continuous at the inner and outer edges of the indenter. The
circumferential displacement for an indenter with a relatively large value of a/b
is found to be less than that for an indenter with a smaller value of a/b both
inside and outside the contact region.
Keywords: torsional contact stress, transversely isotropic composite, annular
indenter, torsional torque and displacement.
1 Introduction
Composite materials have been used extensively in structural applications and
generated considerable interest in the behavior of anisotropic materials. Many
fiber-reinforced composite materials and platelet systems are described as
transversely isotropic materials with five elastic constants [1]. A layered system
Keywords
torsional contact stress, transversely isotropic composite, annular
indenter, torsional torque and displacement.
Related Book
Other papers in this volume
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