Vickers crack extension and residual fracture strength of annealed and thermally tempered glass in water

2021 ◽  
Author(s):  
Hong-Seok Kim ◽  
Sang-Hu Park
Keyword(s):  
Fracture Strength ◽  
Crack Extension ◽  
Tempered Glass

Effect of Electromechanical Loadings on Fracture Strength of Piezoelectric Ceramics

2007 ◽  
Vol 353-358 ◽  
pp. 1544-1547
Author(s):  
Byeung Gun Nam ◽  
H.S. Na ◽  
R. Liu ◽  
Katsuhiko Watanabe
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Fracture Strength ◽  
Applied Electric Field ◽  
Crack Extension ◽  
Piezoelectric Ceramics ◽  
Fracture Load ◽  
Open Circuit ◽  
Condition Effect ◽  
Electromechanical Loading

The effect of electromechanical loadings including their sequence, which was motivated by the property of crack energy density for piezoelectric material, was experimentally investigated. Three-point bending fracture test was performed for two piezoelectric ceramics under different electromechanical loading conditions. It was found that the fracture loads under closed circuit condition are greater than those under open circuit condition. Effect of applied electric field on fracture load in the test varied with materials. Applied electric field always enhanced crack extension in C-21 ceramics regardless of their directions, while it produced very little effect on crack extension under negative electric fields in C-2 ceramics. It was also found that electromechanical loading sequence clearly affects fracture strength, although its effect varies also with materials.

Fracture strength of tempered glass

1982 ◽  
Vol 52 (1-3) ◽  
pp. 395-404 ◽  
Author(s):  
Jingyi Chang ◽  
Jicai Chou
Keyword(s):  
Fracture Strength ◽  
Tempered Glass

Crack divergence phenomena in tempered glass

2020 ◽  
Vol 13 (3) ◽  
pp. 115-129
Author(s):  
Shin’ichi Aratani
Keyword(s):  
Optimal Design ◽  
High Speed ◽  
Glass Plate ◽  
Acute Angle ◽  
Divergence Angle ◽  
High Speed Photography ◽  
Tempered Glass ◽  
Thick Glass

High speed photography using the Cranz-Schardin camera was performed to study the crack divergence and divergence angle in thermally tempered glass. A tempered 3.5 mm thick glass plate was used as a specimen. It was shown that two types of bifurcation and branching existed as the crack divergence. The divergence angle was smaller than the value calculated from the principle of optimal design and showed an acute angle.

Tensile test of sintered Si3N4 and the influence of process defects such as pores on fracture strength.

1989 ◽  
Vol 38 (424) ◽  
pp. 32-38 ◽  
Author(s):  
Hidehiro KISHIMOTO ◽  
Akira UENO ◽  
Hiroshi KAWAMOTO ◽  
Sachio URA
Keyword(s):  
Tensile Test ◽  
Fracture Strength

Improved magnetic properties and fracture strength of NdFeB by dehydrogenation

2006 ◽  
Vol 306 (2) ◽  
pp. 176-180 ◽  
Author(s):  
M. Yan ◽  
L.Q. Yu ◽  
J.M. Wu ◽  
X.G. Cui
Keyword(s):  
Magnetic Properties ◽  
Fracture Strength

Ductile Crack Extension Analysis for X80 Bending Deformation Using Damage-Based Model

2014 ◽  
Author(s):  
Satoshi Igi ◽  
Mitsuru Ohata ◽  
Takahiro Sakimoto ◽  
Kenji Oi ◽  
Joe Kondo
Keyword(s):  
Plastic Strain ◽  
Simulation Model ◽  
Crack Growth ◽  
Crack Extension ◽  
Damage Model ◽  
Stress Triaxiality ◽  
Crack Growth Behavior ◽  
Ductile Crack ◽  
Ductile Crack Growth ◽  
Notch Tip

This paper presents experimental and analytical results focusing on the strain limit of X80 linepipe. Ductile crack growth behavior from a girth weld notch is simulated by FE analysis based on a proposed damage model and is compared with the experimental results. The simulation model for ductile crack growth accompanied by penetration through the wall thickness consists of two criteria. One is a criterion for ductile crack initiation from the notch-tip, which is described by the plastic strain at the notch tip, because the onset of ductile cracking can be expressed by constant plastic strain independent of the shape and size of the components and the loading mode. The other is a damage-based criterion for simulating ductile crack extension associated with damage evolution influenced by plastic strain in accordance with the stress triaxiality ahead of the extending crack tip. The proposed simulation model is applicable to prediction of ductile crack growth behaviors from a circumferentially-notched girth welded pipe with high internal pressure, which is subjected to tensile loading or bending (post-buckling) deformation.

A new method to test the fracture strength of endodontically-treated root dentin

2021 ◽  
Vol 37 (5) ◽  
pp. 796-804
Author(s):  
Haiping Xu ◽  
Ning Ye ◽  
Fei Lin ◽  
Young Cheul Heo ◽  
Alex S.L. Fok
Keyword(s):  
Fracture Strength ◽  
New Method ◽  
Root Dentin
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