Application of Fracture Mechanics to Prevention and Control of Subcritical Crack Growth and Fracture in Advanced High-Performance Ship Structures

1979 ◽  
pp. 213-231 ◽  
Author(s):  
R. J. Goode ◽  
R. W. Judy
Keyword(s):  
Fracture Mechanics ◽  
Crack Growth ◽  
Prevention And Control ◽  
High Performance ◽  
Subcritical Crack Growth ◽  
Ship Structures ◽  
And Control

Stress Corrosion Cracking of En 31 Ball Race Steel Using Fracture Mechanics Methods of Analysis

1971 ◽  
Vol 13 (2) ◽  
pp. 61-64 ◽  
Author(s):  
B. G. Cox ◽  
E. G. Ellison
Keyword(s):  
High Pressure ◽  
Stress Intensity ◽  
Fracture Mechanics ◽  
Ethylene Glycol ◽  
Crack Growth ◽  
Subcritical Crack Growth ◽  
Diesel Oil ◽  
Intensity Threshold ◽  
Measurement And Analysis ◽  
En 31

Subcritical crack growth was studied in an En 31 ball race steel subjected to various fluids, some of which are suitable for possible use in high pressure applications. Using fracture mechanics techniques of measurement and analysis, it was found that Esso Univis P38, Shell Tellus 15, and a 25 per cent glycerine–ethylene glycol mixture caused subcritical crack growth with a corrosion stress intensity threshold approximately half that obtained in air. Diesel oil had no effect. Evidence of blunting of the crack system and some effects of history were found.

scholarly journals Analysis of subcritical crack growth in dental ceramics using fracture mechanics and fractography

2008 ◽  
Vol 24 (5) ◽  
pp. 700-707 ◽  
Author(s):  
Burak Taskonak ◽  
Jason A. Griggs ◽  
John J. Mecholsky ◽  
Jia-Hau Yan
Keyword(s):  
Fracture Mechanics ◽  
Crack Growth ◽  
Subcritical Crack Growth ◽  
Dental Ceramics

Examination of Fracture Interfaces in Silicon Nitride

1975 ◽  
Vol 33 ◽  
pp. 60-61
Author(s):  
Nancy J. Tighe
Keyword(s):  
Silicon Nitride ◽  
Grain Boundary ◽  
Crack Growth ◽  
Subcritical Crack Growth ◽  
Slow Crack Growth ◽  
Ceramic Materials ◽  
Grain Boundary Sliding ◽  
Boundary Phase ◽  
Turbine Engines ◽  
Boundary Sliding

Silicon nitride is one of the ceramic materials being considered for the components in gas turbine engines which will be exposed to temperatures of 1000 to 1400°C. Test specimens from hot-pressed billets exhibit flexural strengths of approximately 50 MN/m2 at 1000°C. However, the strength degrades rapidly to less than 20 MN/m2 at 1400°C. The strength degradition is attributed to subcritical crack growth phenomena evidenced by a stress rate dependence of the flexural strength and the stress intensity factor. This phenomena is termed slow crack growth and is associated with the onset of plastic deformation at the crack tip. Lange attributed the subcritical crack growth tb a glassy silicate grain boundary phase which decreased in viscosity with increased temperature and permitted a form of grain boundary sliding to occur.

Linking decision-making research and cancer prevention and control: Important themes.

2005 ◽  
Vol 24 (4, Suppl) ◽  
pp. S106-S110 ◽  
Author(s):  
Kevin D. McCaul ◽  
Ellen Peters ◽  
Wendy Nelson ◽  
Michael Stefanek
Keyword(s):  
Decision Making ◽  
Cancer Prevention ◽  
Prevention And Control ◽  
Cancer Prevention And Control ◽  
And Control
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