Strength Characterization and Nature of Crack Propagation in Ceramic Materials

2009 ◽  
pp. 225-225-21 ◽  
Author(s):  
RK Govila ◽  
P Beardmore ◽  
KR Kinsman
Keyword(s):  
Crack Propagation ◽  
Ceramic Materials ◽  
Strength Characterization

Mechanism of irregular crack-propagation in thermal controlled fracture of ceramics induced by microwave

2020 ◽  
Vol 21 (6) ◽  
pp. 610
Author(s):  
Xiaoliang Cheng ◽  
Chunyang Zhao ◽  
Hailong Wang ◽  
Yang Wang ◽  
Zhenlong Wang
Keyword(s):  
Crack Propagation ◽  
Industrial Application ◽  
Ceramic Materials ◽  
Advanced Technology ◽  
Analytical Models ◽  
Propagation Mechanism ◽  
Unstable Crack ◽  
Fracture Simulation ◽  
Initial Stage ◽  
Controlled Fracture

Microwave cutting glass and ceramics based on thermal controlled fracture method has gained much attention recently for its advantages in lower energy-consumption and higher efficiency than conventional processing method. However, the irregular crack-propagation is problematic in this procedure, which hinders the industrial application of this advanced technology. In this study, the irregular crack-propagation is summarized as the unstable propagation in the initial stage, the deviated propagation in the middle stage, and the non-penetrating propagation in the end segment based on experimental work. Method for predicting the unstable propagation in the initial stage has been developed by combining analytical models with thermal-fracture simulation. Experimental results show good agreement with the prediction results, and the relative deviation between them can be <5% in cutting of some ceramics. The mechanism of deviated propagation and the non-penetrating propagation have been revealed by simulation and theoretical analysis. Since this study provides effective methods to predict unstable crack-propagation in the initial stage and understand the irregular propagation mechanism in the whole crack-propagation stage in microwave cutting ceramics, it is of great significance to the industrial application of thermal controlled fracture method for cutting ceramic materials using microwave.

The Comparative Analysis of the Non-Symmetric Thermal Shock Crack Propagation in Al2O3 and ZrO2 Bars

2006 ◽  
Vol 45 ◽  
pp. 1640-1645 ◽  
Author(s):  
Tomasz Sadowski ◽  
Zdzislaw Librant ◽  
Marek Boniecki
Keyword(s):  
Composite Material ◽  
Crack Propagation ◽  
Thermal Shock ◽  
Problem Formulation ◽  
Ceramic Materials ◽  
Theoretical Modelling ◽  
Theoretical Problem ◽  
Mechanical And Thermal Properties ◽  
Intensity Factors ◽  
Thermal Shock Problem

The aim of the paper is theoretical modelling and experimental verification of the nonsymmetric thermal shock crack propagation in compound ceramic Al2O3 and ZrO2. The theoretical problem formulation concerns the thermal shock problem in a strip or bar made of nonhomogeneous material, which can exhibit local fluctuation of its mechanical and thermal properties. Such approach allows for: analysis of the real non-homogeneous ceramic materials and solution of the composition optimisation problem for composite material with respect to thermal shock sensitivity. In particular the presented approach enables estimation of the stress intensity factors during thermal shock for any continuous composition of the ceramic material.

Strength characterization and lifetime prediction of dental ceramic materials

2021 ◽  
Vol 37 (1) ◽  
pp. 94-105
Author(s):  
Chao Liu ◽  
Atilim Eser ◽  
Thomas Albrecht ◽  
Vasiliki Stournari ◽  
Monika Felder ◽  
...  
Keyword(s):  
Ceramic Materials ◽  
Lifetime Prediction ◽  
Dental Ceramic ◽  
Strength Characterization

Dynamics And Morphology Of Cracks In Silicon Nitride Films: A Molecular Dynamics Study On Parallel Computers

1995 ◽  
Vol 409 ◽  
Author(s):  
Aiichiro Nakano ◽  
Rajiv K. Kalia ◽  
Priya Vashishta
Keyword(s):  
Molecular Dynamics ◽  
Silicon Nitride ◽  
Crack Propagation ◽  
Crystalline Silicon ◽  
Void Formation ◽  
Ceramic Materials ◽  
Parallel Computers ◽  
Kinetic Roughening ◽  
Fracture Surfaces ◽  
Silicon Nitride Films

AbstractMultiresolution molecular dynamics approach on parallel computers has been used to investigate fracture in ceramic materials. In microporous silica, critical behavior at fracture is analyzed in terms of pore percolation and kinetic roughening of fracture surfaces. Crack propagation in amorphous silicon nitride films is investigated, and a correlation between the speed of crack propagation and the morphology of fracture surfaces is observed. In crystalline silicon nitride films, temperature-assisted void formation in front of a crack tip slows down crack propagation.

Fracture strength characterization of tubular ceramic materials using a simple c-ring geometry

1986 ◽  
Vol 21 (8) ◽  
pp. 2628-2632 ◽  
Author(s):  
M. K. Ferber ◽  
V. J. Tennery ◽  
S. B. Waters ◽  
J. Ogle
Keyword(s):  
Fracture Strength ◽  
Ceramic Materials ◽  
Ring Geometry ◽  
Strength Characterization

Dynamic fatigue and strength characterization of three ceramic materials

2007 ◽  
Vol 18 (6) ◽  
pp. 1219-1224 ◽  
Author(s):  
Erica C. Teixeira ◽  
Jeffrey R. Piascik ◽  
Brian R. Stoner ◽  
Jeffrey Y. Thompson
Keyword(s):  
Ceramic Materials ◽  
Strength Characterization ◽  
Dynamic Fatigue
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