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Keywords: compression precracking
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Journal Articles

Crack Closure Behavior on a Variety of Materials under High Stress Ratios and K max Test Conditions

Y. Yamada, J. C. Newman, Jr.
Journal: Journal of ASTM International
Publisher: ASTM International
Article Type: Research-Article
J. ASTM Int.. February 2012, 9(2): 1–12.
https://doi.org/10.1520/JAI103973
Published Online: May 8, 2012
... data has been generated from threshold to near fracture using the compression precracking constant amplitude or compression precracking load reduction test methods in the threshold regime; and constant-amplitude loading at higher rates. A remote back-face strain (BFS) gage was used to monitor crack...
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Journal Articles

Crack-Closure Behavior of 7050 Aluminum Alloy near Threshold Conditions for Wide Range in Load Ratios and Constant K max Tests

J. C. Newman, Jr., Y. Yamada, J. A. Newman
Journal: Journal of ASTM International
Publisher: ASTM International
Article Type: Research-Article
J. ASTM Int.. April 2010, 7(4): 1–16.
https://doi.org/10.1520/JAI102490
Published Online: April 1, 2010
... ratios and rates, but required a very low constraint factor 1.3 , due to the high crack-opening loads. KEYWORDS: fatigue-crack growth, crack closure, Kmaxeffect, threshold, compression precracking, load ratio Nomenclature a crack size, mm B thickness, mm da / dN crack growth rate, m/cycle Kcp...
View Article titled, Crack-Closure Behavior of 7050 Aluminum Alloy near Threshold Conditions for Wide Range in Load Ratios and Constant K max Tests
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Journal Articles

Load History Effects Resulting from Compression Precracking

MA James, SC Forth, JA Newman
Journal: Journal of ASTM International
Publisher: ASTM International
Article Type: Research-Article
J. ASTM Int.. October 2005, 2(9): 1–17.
https://doi.org/10.1520/JAI12025
Published Online: October 1, 2005
...MA James; SC Forth; JA Newman Compression precracking (CPC) has seen renewed interest as a possible alternative procedure for generating fatigue crack growth threshold data with minimal load history effects, but recent testing confirms results from the literature that compression precracking does...
View Article titled, Load History Effects Resulting from <span class="search-highlight">Compression</span> <span class="search-highlight">Precracking</span>
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