...Xianghong Xu; Zhongkang Lin; Shilong Sheng; Wenjun Yuan Knowledge of crack initiation, propagation, and corresponding thermal shock failure evolution is prerequisite for effective maintenance of civil engineering so as to avoid disaster. Experimental analysis of the cracking in the ceramic sheets...

...M. Blacklock; D. R. Hayhurst This paper considers the multi-axial stress-strain-failure response of two commercially woven ceramic matrix composites. The different failure mechanisms of uni-axially stressed tows and woven composites are addressed. A model is postulated in which the local transverse...

...J. D. Clayton A continuum model is developed for describing deformation and failure mechanisms in crystalline solids (ceramics and minerals) with the cubic spinel structure. The constitutive model describes the response under conditions pertinent to impact loading: high pressures, high strain rates...

...Peter J. Torvik Ceramic materials applied by air plasma spray are used as components of thermal barrier coatings. As it has been found that such coatings also dissipate significant amounts of energy during vibration, they can also contribute to reducing the amplitude of resonant vibrations...

...Z. Wei; A. G. Evans; V. S. Deshpande The ability of a ceramic to resist penetration by projectiles depends, in a coupled manner, on its confinement and its mechanical properties. In order to explore the fundamental inter-relationships, a simulation protocol is required that permits...

.... Case studies for steel, nylon, and ceramic pillars show that useful strength can be achieved in such attachments; when buckling during assembly and contact failure can be avoided, adhesive performance as high as 30% of the tensile strength of the pillar material may be possible. 15 07 2007 18...

...B.-L. Wang; Y.-W. Mai This paper considers a piezoelectric ceramic layer with a surface electrode. It focuses on the effect of the layer thickness on the electrode tip fields. A closed-form solution for the electromechanical fields at the electrode tip is obtained and is expressed in terms...

... showed the transit of intergranular microcracks to transgranular microcracks with increasing shock loading. A failure wave in impacted ceramics is a continuous fracture zone, which may be associated with the damage accumulation process during the propagation of shock waves. Then a progressive fracture...

...Florin Bobaru We present a numerical approach for material optimization of metal-ceramic functionally graded materials (FGMs) with temperature-dependent material properties. We solve the non-linear heterogeneous thermoelasticity equations in 2D under plane strain conditions and consider examples...

...Christian F. Niordson; Viggo Tvergaard In metal-ceramic systems the constraint on plastic flow leads to so high stress triaxialities that cavitation instabilities may occur. If the void radius is on the order of magnitude of a characteristic length for the metal, the rate of void growth is reduced...

...Fjo´la Jo´nsdo´ttir; Glenn E. Beltz; Robert M. McMeeking Recently, three-dimensional structured ceramic composites with large threshold strengths (i.e., stress below which there is zero probability of failure) have been fabricated utilizing an architecture consisting of relatively stress-free...

... for the goal. From Weibull to this day tests determined that “power laws are fundamental constants, robust to the details of the underlying interactions” 32 . In this work a two-dimensional triangular lattice substitutes a damage tolerant specimen, i.e., a ceramic in which the microcracks nucleate...

..., and iterative algorithms are used to obtain critical buckling temperatures and the post-buckling temperature-deflection curves. The results are presented for both symmetrically and unsymmetrically laminated plates with ceramic/metal functionally graded layers, showing the effects of temperature-dependent...

... are investigated. 31 05 2004 18 01 2005 ceramics plates (structures) elastic deformation The concept of functionally graded materials (FGMs) has been proposed in the beginning of the 90’s by Japanese researchers ( 1 2 ). The idea came from the awareness that the abrupt transition...

... of Houston, Houston, TX 77204-4792, and will be accepted until four months after final publication of the paper itself in the ASME JOURNAL OF APPLIED MECHANICS . 19 Feb 2001 16 Oct 2001 20 06 2002 porous materials ceramics stress analysis powder technology permeability finite...

...Z.-H. Jin, Mem. ASME; G. H. Paulino, Mem. ASME; R. H. Dodds,, Jr.,, Mem. ASME This work studies mode I crack growth in ceramic/metal functionally graded materials (FGMs) using three-dimensional interface-cohesive elements based upon a new phenomenological cohesive fracture model. The local...

.... The results from this investigation can be used to optimize the manufacture of ceramic-matrix composites. [S0021-8936(00)02703-3] Contributed by the Applied Mechanics Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF APPLIED MECHANICS . Manuscript received...