A Comparative Experimental Study on the Fatigue Crack Closure Behavior Under Cyclic Loading for Steels and Aluminum Alloys PDF Download
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Author: JC. Gasco Publisher: ISBN: Category : Aluminum alloys Languages : en Pages : 11
Book Description
Experimental data on fatigue crack closure for two steels which present different mechanical properties are presented. The data are compared with experimental results obtained under similar test conditions on aluminum alloys. On the basis of such a comparison, an attempt is made to identify the most suitable engineering parameters to describe the fatigue crack closure behavior. As a result, it is shown how fatigue crack closure can be related to several basic features of fatigue crack growth.
Author: JC. Gasco Publisher: ISBN: Category : Aluminum alloys Languages : en Pages : 11
Book Description
Experimental data on fatigue crack closure for two steels which present different mechanical properties are presented. The data are compared with experimental results obtained under similar test conditions on aluminum alloys. On the basis of such a comparison, an attempt is made to identify the most suitable engineering parameters to describe the fatigue crack closure behavior. As a result, it is shown how fatigue crack closure can be related to several basic features of fatigue crack growth.
Author: National Symposium on Fracture Mechanics Publisher: ASTM International ISBN: 9780803103641 Category : Technology & Engineering Languages : en Pages : 808
Author: AF. Blom Publisher: ISBN: Category : Aluminum alloys Languages : en Pages : 17
Book Description
The development of crack closure during the extension of long and short fatigue cracks has been investigated in a 2124 aluminum alloy using both experimental and numerical procedures. Specifically, the growth rate and closure behavior of long (~17 to 38 mm) cracks in compact C(T) specimens and through-thickness physically-short (~50 to 40 ?m) cracks in single-edge-notched SEN(B) bend specimens have been examined experimentally from threshold levels to instability (over the range ~10-12 to 10-7 m/cycle), and results compared with those predicted numerically using an elastic-plastic finite-element analysis of fatigue crack advance in plane strain. It is shown that the numerical analysis consistently underpredicts the magnitude of crack closure for both long and short cracks, particularly at near-threshold levels; an observation attributed to the fact that the numerical procedures can only model contributions to closure from cyclic plasticity, whereas, in reality, significant additional closure arises from the wedging action of fracture surface asperities and corrosion debris. Such closure is shown to provide the predominant mechanism for rationalizing differences in the growth rate behavior between long and physically short cracks, although other factors, such as the nature of the singularity and the extent of local plasticity, are deemed potentially to be important.
Author: JC. Gasco
Author: JC. Gasco
Author: National Symposium on Fracture Mechanics
Author: Thomas A. Cruse
Author: Melvin F. Kanninen
Author: John A. Newman
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Author: 
Author: Wolf Elber
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Author: AF. Blom