scholarly journals Influence of temperature and water on subcritical crack growth parameters and long-term strength for igneous rocks

2013 ◽  
Vol 193 (1) ◽  
pp. 47-60 ◽  
Author(s):  
Yoshitaka Nara ◽  
Hiroshi Yamanaka ◽  
Yuma Oe ◽  
Katsuhiko Kaneko
Keyword(s):  
Crack Growth ◽  
Subcritical Crack Growth ◽  
Growth Parameters ◽  
Igneous Rocks ◽  
Term Strength ◽  
Influence Of Temperature

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

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

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

A Review of Crack Detection In-Line Inspection Case Studies

2010 ◽  
Author(s):  
Neil Bates ◽  
David Lee ◽  
Clifford Maier
Keyword(s):  
Crack Growth ◽  
Case Studies ◽  
Crack Detection ◽  
Growth Parameters ◽  
Probability Distributions ◽  
Low Frequency ◽  
Probability Of Failure ◽  
Probability Of Detection ◽  
Inspection Data

This paper describes case studies involving crack detection in-line inspections and fitness for service assessments that were performed based on the inspection data. The assessments were used to evaluate the immediate integrity of the pipeline based on the reported features and the long-term integrity of the pipeline based on excavation data and probabilistic SCC and fatigue crack growth simulations. Two different case studies are analyzed, which illustrate how the data from an ultrasonic crack tool inspection was used to assess threats such as low frequency electrical resistance weld seam defects and stress corrosion cracking. Specific issues, such as probability of detection/identification and the length/depth accuracy of the tool, were evaluated to determine the suitability of the tool to accurately classify and size different types of defects. The long term assessment is based on the Monte Carlo method [1], where the material properties, pipeline details, crack growth parameters, and feature dimensions are randomly selected from certain specified probability distributions to determine the probability of failure versus time for the pipeline segment. The distributions of unreported crack-related features from the excavation program are used to distribute unreported features along the pipeline. Simulated crack growth by fatigue, SCC, or a combination of the two is performed until failure by either leak or rupture is predicted. The probability of failure calculation is performed through a number of crack growth simulations for each of the reported and unreported features and tallying their respective remaining lives. The results of the probabilistic analysis were used to determine the most effective and economical means of remediation by identifying areas or crack mechanisms that contribute most to the probability of failure.

scholarly journals Subcritical crack growth parameters in glass as a function of environmental conditions

2020 ◽  
Author(s):  
Christopher Brokmann ◽  
Stefan Kolling ◽  
Jens Schneider
Keyword(s):  
Crack Growth ◽  
Environmental Conditions ◽  
Subcritical Crack Growth ◽  
Growth Parameters ◽  
Crack Depth ◽  
Indentation Test ◽  
Soda Lime ◽  
Initial Crack ◽  
Chemical Compositions ◽  
Critical Crack

Abstract In the present work, subcritical crack growth in soda–lime silicate glass is investigated under different environmental conditions. Crack growth parameters as a function of temperature and humidity were determined by dynamic fatigue tests, which has been verified by using the in-situ method of filming crack growth during experiments. The specimens were pre-damaged for constant initial crack lengths in all specimens using the Vickers indentation test. The determined parameters were compared with those from literature in order to discuss existing deviations of sub-critical crack growth parameters in literature. These deviations may be caused by environmental conditions and different chemical compositions of the glass. Arrest lines were used to determine the ratio of crack width to crack depth in Vickers indented specimens. For the initial crack depth, images of fracture surfaces were taken using an scanning electron microscope. Furthermore, the influence of humidity and temperature on the failure stress of unindented specimens with a constant initial crack length was simulated.

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