The Dependence of Fatigue Crack Propagation on Strain Energy Release Rate and Crack Opening Displacement

2009 ◽  
pp. 1-1-15 ◽  
Author(s):  
JM Barsom
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Energy Release Rate ◽  
Energy Release ◽  
Crack Opening Displacement ◽  
Fatigue Crack Propagation ◽  
Release Rate ◽  
Crack Opening ◽  
Strain Energy Release ◽  
Opening Displacement

scholarly journals Moving interfacial Griffith crack between bonded dissimilar media

2005 ◽  
Vol 2005 (3) ◽  
pp. 289-299 ◽  
Author(s):  
S. Mukherjee ◽  
S. Das
Keyword(s):  
Energy Release Rate ◽  
Energy Release ◽  
Crack Opening Displacement ◽  
Release Rate ◽  
Strain Energy ◽  
Strain Energy Release Rate ◽  
Crack Opening ◽  
Strain Energy Release ◽  
Griffith Crack ◽  
Opening Displacement

The plane strain problem of determining strain energy release rate, crack energy, and crack-opening displacement (COD) for a moving Griffith crack at the interface of two dissimilar orthotropic half-planes is considered. The problem is reduced to a pair of singular integral equations of second kind which have finally been solved by using Jacobi polynomials. Graphical plots of the strain energy release rate, crack energy, and crack-opening displacement for the problem in different particular cases are presented.

On the Energy Release Rate of Elliptical Cracks in Anisotropic Elastic Media

2003 ◽  
Vol 19 (1) ◽  
pp. 233-239
Author(s):  
Yibin Xue ◽  
Jianmin Qu
Keyword(s):  
Energy Release Rate ◽  
Energy Release ◽  
Crack Opening Displacement ◽  
Release Rate ◽  
Crack Opening ◽  
Average Energy ◽  
Local Energy ◽  
Opening Displacement ◽  
Work Done ◽  
Elliptical Cracks

ABSTRACTThis brief note discusses some issues related to the calculation of energy release rate for elliptical cracks in anisotropic solids. By using the Stroh formalism, analytical expressions of the energy release rate are obtained for elliptical cracks in an unbounded anisotropic solid. Because of material anisotropy and geometric asymmetry of the crack, the local energy release rate varies along the crack front. The average energy release rate can be obtained by integrating the local energy release rate over the entire crack front. On the other hand, the total work done by the crack-surface traction on the entire crack opening displacement can be easily evaluated once the crack opening displacement is known. It is shown that the average energy release rate is equal to the rate of change per unit crack area increment of the work done by the external load on the crack opening displacement.

Effects of Grain Size on Fatigue Crack Propagation in Copper Film

2010 ◽  
Vol 452-453 ◽  
pp. 289-292
Author(s):  
Kenichi Shimizu ◽  
Tashiyuki Torii
Keyword(s):  
Grain Size ◽  
Fatigue Crack ◽  
Crack Propagation ◽  
Crack Opening Displacement ◽  
Fatigue Crack Propagation ◽  
Fatigue Cracks ◽  
Crack Opening ◽  
Crack Propagation Rate ◽  
Propagation Rate ◽  
Opening Displacement

Using a fatigue testing method by which fatigue cracks can be initiated and propagated in a film adhered to cover a circular through-hole in a base plate subjected to cyclic loads, annealed copper films of 100m thickness with different crystal grain sizes were fatigued. The fatigue crack propagation in the film with large grains was often decelerated, so the crack propagation rate of the film with the large grain was lower than that of the film with the small grain. When the crack propagation was decelerated, the crack opening displacement obtained from the film with large grain size was smaller than that obtained from the film with small grain size. The relationship between the fatigue crack propagation rate and the stress intensity factor estimated from the crack opening displacement was identical for the cracks in the film with the large grain and the small grain.

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