Critical Stress Intensity Factors Applied to Glass Reinforced Polyester Resin

1973 ◽  
Vol 7 (2) ◽  
pp. 146-159 ◽  
Author(s):  
M.J. Owen ◽  
P.T. Bishop
Keyword(s):  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Critical Stress ◽  
Polyester Resin ◽  
Intensity Factors

Simple estimation of critical stress intensity factors of wood by tests with double cantilever beam and three-point end-notched flexure

Holzforschung ◽  
2007 ◽  
Vol 61 (2) ◽  
pp. 182-189 ◽  
Author(s):  
Hiroshi Yoshihara
Keyword(s):  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Intensity Factor ◽  
Cantilever Beam ◽  
Stress Intensity Factors ◽  
Critical Stress ◽  
Double Cantilever Beam ◽  
Western Hemlock ◽  
Mode I ◽  
Intensity Factors

Abstract Simple equations are proposed for calculation of critical stress intensity factors by tests using double cantilever beam (DCB) and three-point end-notched flexure (3ENF). The calculation modes are named here as modes I and II and are based on the beam theory and 95 previously published data on the elasticity properties of woods. The validity of the data was examined on specimens of western hemlock wood with various crack lengths. The influence of the elastic properties is more significant on the stress intensity factor calculated in mode I than that calculated in mode II. Further work is needed, particularly for measuring the mode I stress intensity factor. However, it is obvious from the experiments with western hemlock that the critical stress intensity factors can be determined by the equations proposed here.

Critical stress intensity factors in steel cracked wires

2011 ◽  
Vol 32 (8-9) ◽  
pp. 4424-4429 ◽  
Author(s):  
J. Toribio ◽  
F.J. Ayaso ◽  
B. González ◽  
J.C. Matos ◽  
D. Vergara ◽  
...  
Keyword(s):  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Critical Stress ◽  
Intensity Factors

Fracture Resistance of Bended Glued Timber Elements with Flaws

2014 ◽  
Vol 988 ◽  
pp. 363-366 ◽  
Author(s):  
Leonid Stupishin ◽  
Victor Kabanov ◽  
Aleksander Masalov
Keyword(s):  
Stress Intensity ◽  
Moisture Content ◽  
Stress Intensity Factors ◽  
Critical Stress ◽  
Critical Stress Intensity Factor ◽  
Intensity Factors ◽  
Front Width ◽  
Glue Joint ◽  
Glued Laminated Timber ◽  
Second Fracture

The test results for deriving of the dependencies of critical stress intensity factors on significant agents are presented for glued laminated timber. The dependencies of critical stress intensity factors on moisture content, width of cross section for I and II forms of fracture are investigated. For the second fracture form the influence of glue joint thickness within the limits of 0.07 - 0.35 mm was estimated. The influence on critical stress intensity factor was estimated also for the moisture content of wood within the limits of 12-35%, for crack front width within the limits of 30 - 140 mm, for loading velocity within the limits of 16 - 32 kN/min, for the form of crack tip, and the location of crack - in glue joint or in wood.

Sulfide Stress Corrosion Cracking of Steels

CORROSION ◽  
1970 ◽  
Vol 26 (5) ◽  
pp. 177-188 ◽  
Author(s):  
L. M. DVORACEK
Keyword(s):  
Stress Intensity ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Stress Intensity Factors ◽  
Critical Stress ◽  
Corrosion Cracking ◽  
Intensity Factors ◽  
Sulfide Stress ◽  
Sulfide Stress Corrosion Cracking ◽  
Critical Constants

Abstract Critical nominal stress and critical stress intensity factors for sulfide stress corrosion cracking of various steels were determined using fatigue-precracked, laboratory, cantilever beam specimens and short lengths of oil field casing and tubing pressured to failure. The laboratory critical constants were found to be lower than those obtained from short lengths of casing and tubing containing longitudinal internal surface notches. Acceptable steels were defined by statistical methods as those which did not crack in sulfide environments when stressed to their yield strength. The effects of sodium chloride, pH, hydrogen sulfide concentration, temperature, cold working, heat treatment and strength of the steel on these critical constants were determined. Critical flaw sizes which can be used for inspection were calculated from the critical stress intensity factors.

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