Dynamic intensity factors for an interface flaw extending at a non-uniform rate

1974 ◽  
Vol 4 (1) ◽  
pp. 51-63 ◽  
Author(s):  
L. M. Brock
Keyword(s):  
Intensity Factors ◽  
Uniform Rate ◽  
Dynamic Intensity Factors

Experiment of Control Blasting with Water Jets Slotting

2012 ◽  
Vol 629 ◽  
pp. 558-563
Author(s):  
Xiao Chuan Wang ◽  
Yong Kang ◽  
Xiao Feng Yang
Keyword(s):  
Small Diameter ◽  
Water Jet ◽  
Energy Concentration ◽  
Rock Damage ◽  
Dynamic Effects ◽  
Similar Material ◽  
Intensity Factors ◽  
Rock Breakage ◽  
Water Jets ◽  
Dynamic Intensity Factors

Use similar material and system of caustics to simulate the characteristics of fissure distribution and dynamic vacation regulations of fissure generation and expansion, whose fissure is made by plexiglass jet slotting and blasting under the condition of explosion. We have analyzed and compared the expanding length and velocity of main fissure’s point and dynamic intensity factors between the holes of ordinary blasting and water-jet slotting; and discussed the dynamic effects of slotting blasting. The study shows that, with the same explosive quantity, the fissures of common blasting hole distribute randomly around the hole with large quantity but with short fissures and the caustic spots have small diameter and distribute with fissures; while the fissures of jet slotting hole blasting are longer and distribute mainly along the fissure’s direction, the caustic spots are clear and mainly concentrate among the fissures with lager diameter. That is to say, the jet cutting blasting energy concentration can improve the effect of rock damage. The existence of jet seam has a guidance quality to rock breakage. Main fissures take place and expand from the direction of slotting seam while the distension along other directions is heavily weakened in the process.

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

Complex study of the fracture processes in materials and structures

2018 ◽  
Vol 84 (11) ◽  
pp. 46-51 ◽  
Author(s):  
N. A. Makhutov
Keyword(s):  
Fracture Mechanics ◽  
Crack Resistance ◽  
Scientific Basis ◽  
Intensity Factors ◽  
Nonlinear Fracture Mechanics ◽  
Nonlinear Fracture ◽  
Linear Fracture ◽  
Science Technology ◽  
Fracture Processes

The results of comprehensive studies of multifactor processes, mechanisms and criteria for fracture at a variation of the crack-like defect state, loading conditions and mechanical properties of structural materials carried out in the 20th - 21st centuries are presented on the basis of monographic publications and articles published in the journal “Zavodskaya Laboratoriya. Diagnostika Materialov.” Crack resistance of materials and structures has become a key problem of the material science, technology, design, manufacture and service of structures. Fracture mechanics including estimation of the stress-strain and limiting states in a cracks tip formed a scientific basis of the crack resistance analysis Stress intensity factors (linear fracture mechanics) and strain intensity factors (nonlinear fracture mechanics) are accepted as the basic criteria of those states. The basic computational relations for construction of the fracture diagrammes which link the cracks growth with conditions of a static, cyclic, long-term, dynamic loading are presented. Parameters of computational relations are put into correspondence with the features of fracture processes on nano-, micro-, meso- and macrolevels. Prospects of the research and guidelines of further studing crack resistance are discussed.

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