scholarly journals Subcritical crack growth and long-term strength in rock and cementitious material

2010 ◽  
Vol 164 (1) ◽  
pp. 57-71 ◽  
Author(s):  
Yoshitaka Nara ◽  
Masafumi Takada ◽  
Daisuke Mori ◽  
Hitoshi Owada ◽  
Tetsuro Yoneda ◽  
...  
Keyword(s):  
Crack Growth ◽  
Subcritical Crack Growth ◽  
Cementitious Material ◽  
Term Strength

Subcritical Crack Growth and Long-Term Strength in Rock and High-Strength and Ultra Low-Permeability Concrete

2009 ◽  
Vol 58 (6) ◽  
pp. 525-532 ◽  
Author(s):  
Yoshitaka NARA ◽  
Masafumi TAKADA ◽  
Daisuke MORI ◽  
Hitoshi OWADA ◽  
Tetsuro YONEDA ◽  
...  
Keyword(s):  
Crack Growth ◽  
Subcritical Crack Growth ◽  
High Strength ◽  
Low Permeability ◽  
Term Strength

scholarly journals Effect of Surrounding Environment on Subcritical Crack Growth Index and Long-Term Strength for Rock

2010 ◽  
Vol 59 (3) ◽  
pp. 180-185 ◽  
Author(s):  
Yoshitaka NARA ◽  
Toshifumi IGARASHI ◽  
Naoki HIROYOSHI ◽  
Tetsuro YONEDA ◽  
Katsuhiko KANEKO
Keyword(s):  
Crack Growth ◽  
Subcritical Crack Growth ◽  
Growth Index ◽  
Term Strength ◽  
Surrounding Environment

scholarly journals Subcritical Crack Growth and Long-Term Strength in Rock and High-Strength and Ultra Low-Permeability Concrete (Vol.58, No.6)

2009 ◽  
Vol 58 (7) ◽  
pp. errata_1
Author(s):  
Yoshitaka NARA ◽  
Masafumi TAKADA ◽  
Daisuke MORI ◽  
Hitoshi OWADA ◽  
Tetsuro YONEDA ◽  
...  
Keyword(s):  
Crack Growth ◽  
Subcritical Crack Growth ◽  
High Strength ◽  
Low Permeability ◽  
Term Strength

scholarly journals Evaluation of Long-Term Strength of Rock with Considering Changes of Surrounding Environment Based on Subcritical Crack Growth

2014 ◽  
Vol 63 (3) ◽  
pp. 212-218
Author(s):  
Yoshitaka NARA ◽  
Yuma OE ◽  
Sumihiko MURATA ◽  
Tsuyoshi ISHIDA ◽  
Katsuhiko KANEKO
Keyword(s):  
Crack Growth ◽  
Subcritical Crack Growth ◽  
Term Strength ◽  
Surrounding Environment

Estimation of Long-Term Strength of Rock Based on Subcritical Crack Growth

2015 ◽  
pp. 2157-2160
Author(s):  
Yoshitaka Nara ◽  
Yuma Oe ◽  
Sumihiko Murata ◽  
Tsuyoshi Ishida ◽  
Katsuhiko Kaneko
Keyword(s):  
Crack Growth ◽  
Subcritical Crack Growth ◽  
Term Strength

Mechanical Behavior of Alumina Toughened Zirconia Nanocomposites with Different Alumina Additions

2014 ◽  
Vol 96 ◽  
pp. 61-66 ◽  
Author(s):  
Luis Antonio Díaz ◽  
Sergio Rivera ◽  
Adolfo Fernández ◽  
Anna Okunkova ◽  
Yu.G. Vladimirov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Crack Propagation ◽  
Mechanical Behavior ◽  
Crack Growth ◽  
Disperse Phase ◽  
Subcritical Crack Growth ◽  
The Other ◽  
Structural Components ◽  
Monolithic Ceramics

ZrO2 and Al2O3 are monolithic ceramics used today in a wide variety of structural components. However, both materials present important drawbacks for some specific applications. In the case of Al2O3, its moderate strength (500 MPa) and toughness (4 MPa.√m) makes it unsuitable for high loading conditions. On the other hand, ZrO2 presents higher strength and toughness values (900 MPa and 6 MPa.√m) than Al2O3 but it is a material limited in its long-term behaviour due to its bad response to hydrothermal ageing and a pronounced tendency for subcritical crack growth. Due to this fact, ceramic nanocomposites made of Al2O3 and ZrO2 (ATZ and ZTA) have been developed in the last years in order to overcome the main drawbacks of the monolithic materials as they can combine the properties of both, strong and tough materials, simultaneously, with null ageing and even higher biocompatibility. In this work, several amounts of Al2O3 disperse phase (15, 35 and 50 vol %) were added to one ZrO2 matrix (CeO2 - 10 mol %) in order to see their effect on the mechanical properties, subcritical crack propagation and long-term reliability.

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