Journal ArticleDOI
Thermal fracture studies in ceramic systems using an acoustic emission technique
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In this article, an acoustic emission technique for measuring the failure time in thermal shock experiments is described, which offers a unique opportunity to measure the heat-transfer coefficient of the test system and hence, to obtain a fully quantitative measure of the peak surface stress generated during the test.Abstract:
An acoustic emission technique for measuring the failure time in thermal shock experiments is described. The technique offers a unique opportunity to measure the heat-transfer coefficient of the test system and hence, to obtain a fully quantitative measure of the peak surface stress generated during the test. Measurements on soda-lime glass have demonstrated that rapid thermal fracture in the material occurs when the surface stress attains a critical value equal to the propagation stress for the most deleterious surface flaw. The effects of slow crack growth on the failure time are also investigated and correlated with recently developed theory.read more
Citations
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Journal ArticleDOI
Thermal shock behaviour of ceramics and ceramic composites
H. Wang,R. N. Singh +1 more
TL;DR: In this paper, the theoretical and experimental studies on the thermal shock behavior of monolithic ceramics and ceramic composites are reviewed; a survey of the experimental techniques that have been developed for characterising thermal shock damage is also included.
Journal ArticleDOI
Structural Integrity in Severe Thermal Environments
Anthony G. Evans,E. A. Charles +1 more
TL;DR: In this article, the theory of structural stability of ceramics in severe thermal environments was explored via the use of precracking, and it was shown that structural stability should be possible when an array of prec-acks is used, but the precracks required for this purpose are relatively large.
Journal ArticleDOI
Acoustic spectrometry as used for the evaluation of tribological systems
TL;DR: In this paper, a study of tribological metal-polymer systems is presented, where a number of general relations were determined for friction pairs, reflecting the influence of these factors on the acoustic activity of a rubbing contact.
Journal ArticleDOI
Failure prediction of the thermal fatigue resistance of a glass
TL;DR: In this paper, the thermal fatigue behavior of soda-lime-silica glass subjected to a water quench was predicted from data for the rate of slow crack growth as a function of stress intensity factor, the pertinent physical properties, the initial crack depth as well as the heat transfer environment.
References
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Book
Conduction of Heat in Solids
H. S. Carslaw,John Conrad Jaeger +1 more
TL;DR: In this paper, a classic account describes the known exact solutions of problems of heat flow, with detailed discussion of all the most important boundary value problems, including boundary value maximization.
Journal ArticleDOI
Unified Theory of Thermal Shock Fracture Initiation and Crack Propagation in Brittle Ceramics
TL;DR: In this article, a fracture-mechanical theory for crack propagation in brittle ceramics subjected to thermal shock is presented and the criteria of crack stability are derived for a brittle solid uniformly cooled with triaxially constrained external boundaries.
Journal ArticleDOI
Stress Corrosion and Static Fatigue of Glass
Sheldon M. Wiederhorn,L. H. Bolz +1 more
TL;DR: In this article, the authors used fracture mechanics techniques to measure the crack velocities in water as a function of applied stress intensity factor and temperature, and apparent activation energies for crack motion were obtained.
Journal ArticleDOI
Factors Affecting Thermal Stress Resistance of Ceramic Materials
TL;DR: In this paper, the sources and calculation of thermal stresses are considered, together with the factors involved in thermal stress resistance factors, and properties affecting thermal stress resilience of ceramics are reviewed and testing methods are considered.
Journal ArticleDOI
Failure Prediction in Structural Ceramics Using Acoustic Emission
A. G. Evans,M. Linzer +1 more
TL;DR: In this paper, two types of acoustic emission are detected: slow growth of the fracture-initiating flaw; the emission rate depends primarily on crack velocity; and cracking associated with second-phase particles, as a result of the combined action of the applied stress and local thermal and mechanical stresses.