STRESS INHOMOGENEITY IN A CERAMIC
SURFACE LAYER UNDER ACTION OF AN EXTERNAL LOAD.
PART 1. EFFECT OF COMPLEX MECHANICAL LOADING
V. V. Kuzin,
S. N. Grigor’ev,
and V. N. Ermolin
Translated from Novye Ogneupory, No. 10, pp. 47 – 51, October, 2013.
Original article submitted June 27, 2013.
First results are provided for a comprehensive study of stress inhomogeneity in a ceramic surface layer. The
stress-strained state of a ceramic surface layer based on zirconium dioxide under the action of a complex me
chanical load is studied. High stress inhomogeneity is revealed in ceramic structural elements. A requirement
is noted for considering stress inhomogeneity in describing a wear and failure mechanism, and also in design
ing objects of this ceramic for prescribed operating conditions.
Keywords: ceramic, inhomogeneity, stress-strained state, surface layer, modelling, zirconium dioxide, design.
Improvement of the operating properties of ceramic
components is possible on the basis of a profound study of
processes occurring within a surface layer [1 – 3]. It is partic-
ularly important to determine features of material
inhomogeneous deformation, under action of external loads
[4, 5]. However, these studies are significantly complicated
by a requirement for considering boundaries between ce-
ramic interacting structural elements having different proper-
ties [6, 7].
Analysis of the stress-strained state of structural
inhomogeneous bodies makes it possible to determine fea
tures of their failure, and to formulate effective recommenda
tions for a reduction in the intensity of a process [8, 9]. An
important aspect of analysis is a study of local stresses at
boundaries of interacting structural elements of inhomo
geneous material and evaluation of the volumetric stress dis
tribution in a surface layer of a component of this material
with different external action [10, 11]. Solution of this com
plex task makes it possible to realize the idea of computer
design of structurally inhomogeneous materials . This
approach may also be used for automation of a search for op
timum sintered material compositions for manufacture of in
novative objects intended for specific operating conditions.
The aim of this work is to evaluate stress inhomogeneity
in a surface layer of zirconium oxide ceramic under action of
a complex mechanical load. The effect of thermal and com
bined loading is also studied; results of these studies will be
provided future articles.
Solution of this problem is based on numerical model-
ling of deformation processes using methodology of control
by ceramic component operating properties [5, 9], and a set
of models [2, 6]. A design scheme is formulated on their ba-
sis for carrying out numerical experiments in a SolidWorks
simulation software module (Fig. 1).
The design layout is presented in the from of a structure
with a size of 38 ´ 18 ´ 4 mm, consisting of fragments of
components D1 and D2 made of ceramic and copper respec
tively. These components are in close contact, and the form
of the interface takes account of real microgeometry of a ce
Refractories and Industrial Ceramics Vol. 54, No. 5, January, 2014
1083-4877/14/05405-0416 © 2014 Springer Science+Business Media New York
FGBOU VPO Moscow State Technological University Stankin,
Fig. 1. Design layout.