Approximate equation for determining the stress-intensity factors KI for bodies with subsurface cracks

1986 ◽  
Vol 18 (11) ◽  
pp. 1479-1482
Author(s):  
A. V. Ovchinnikov
Keyword(s):  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Approximate Equation ◽  
Intensity Factors ◽  
Subsurface Cracks

scholarly journals Short Subsurface Cracks Under Conditions of Slip and Stick Caused by a Moving Compressive Load

1985 ◽  
Vol 52 (4) ◽  
pp. 811-817 ◽  
Author(s):  
S. Sheppard ◽  
J. R. Barber ◽  
M. Comninou
Keyword(s):  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Coulomb Friction ◽  
Compressive Load ◽  
Rolling Contact ◽  
Intensity Factors ◽  
Subsurface Cracks ◽  
Spalling Failure ◽  
Load Location ◽  
Crack Faces

The mechanism of spalling failure in rolling contact is modeled by an elastic half-plane with a subsurface crack parallel to the surface, loaded by a compressive normal force which moves over the surface. Coulomb friction at the crack faces reduces the Mode II Stress Intensity Factors and results in a number of history-dependent slip-stick configurations. The formulation used to study these involves a singular integral equation in two variables which must be solved numerically, and because of the history dependence, requires in an incremental solution. Only crack lengths and coefficients of friction that result in a maximum of two slip or stick zones for any load location are considered in this paper. It is found that the maximum range of stress intensity factors occurs at the trailing crack tip.

Solutions of Stress Intensity Factors of Subsurface Cracks

2006 ◽  
Vol 312 ◽  
pp. 83-88 ◽  
Author(s):  
Xi Qiao Feng ◽  
M. Xu
Keyword(s):  
Free Surface ◽  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Mixed Mode ◽  
Integral Transform ◽  
Crack Tip ◽  
Circular Crack ◽  
Griffith Crack ◽  
Intensity Factors ◽  
Subsurface Cracks

In the present paper, an integral transform-based method is presented for calculating the stress intensity factors of subsurface cracks. Due to the interaction between the crack and the free surface, the crack tip fields are generally of I-II mixed mode. The solutions for two typical configurations, a Griffith crack and a circular crack beneath the free surface of a semi-infinite solid, are derived.

DETERMINATION OF RESIDUAL STRESSES AND STRESS INTENSITY FACTORS BY REMOVING LOCAL MATERIAL

2017 ◽  
Vol 48 (4) ◽  
pp. 377-398
Author(s):  
Svyatoslav Igorevich Eleonskii ◽  
Igor Nikolaevich Odintsev ◽  
Vladimir Sergeevich Pisarev ◽  
Stanislav Mikhailovich Usov
Keyword(s):  
Stress Intensity ◽  
Residual Stresses ◽  
Stress Intensity Factors ◽  
Intensity Factors ◽  
Local Material
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