Dynamicbehaviorsofcrackpropagationindirectionalfractureblasting withtwoholes

YangRen-shu; WangYan-bing; YueZhong-wen; LiuGuo-qing

doi:10.11883/1001-1455(2013)06-0631-07

Volume 33 Issue 6

Apr. 2014

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YangRen-shu, WangYan-bing, YueZhong-wen, LiuGuo-qing. Dynamicbehaviorsofcrackpropagationindirectionalfractureblasting withtwoholes[J]. Explosion And Shock Waves, 2013, 33(6): 631-637. doi: 10.11883/1001-1455(2013)06-0631-07

Citation:

YangRen-shu, WangYan-bing, YueZhong-wen, LiuGuo-qing. Dynamicbehaviorsofcrackpropagationindirectionalfractureblasting withtwoholes[J]. Explosion And Shock Waves, 2013, 33(6): 631-637. doi: 10.11883/1001-1455(2013)06-0631-07

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Dynamicbehaviorsofcrackpropagationindirectionalfractureblasting withtwoholes

doi: 10.11883/1001-1455(2013)06-0631-07

1.
Schoolof MechanicsandArchitectureEngineering,ChinaUniversityof
2.
MiningandTechnology (Beijing),Beijing100083,China;

Funds:

NationalNaturalScienceFoundationofChina(51134025)

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Corresponding author: WangYan-bing
Publish Date: 2013-11-25

Abstract

Abstract

Usingadynamiccausticsblastloadingsystem,thepaperstudiedthedynamicbehaviorof perforatedcrackpropagationbetweentwoholesandlateralcrackpropagationontheconditionofgroovingwithtwoboreholeblastingandsimultane usinitiation.Ascanbeseenfromtheresults,theperforatedcracktipsdidnotdirectlyencounter, butonewasatthetopandtheotherwasbelow,metand wentonpropagation,thengotclosertothedirectionoftheanisotropicexistingcrack.Thevelocity andaccelerationshowedatypeoffluctuationchangesaswave.Foronecrack,theaccelerationfirstly cametothepeak,thenthevelocitycametothepeak.ThedynamicstressintensityfactorKⅠ decreasedrapidlyfromthemaximum, oscillated,anduptothesecondpeak,thendecreased.KⅡ was almostsmallerthanKⅠ .Thestressintensityfactoroftheperforatedcracktipwasalmostgreater thanthatofthelateralcrack.Thedynamicenergyreleaseratedecreasedrapidly,oscillated,andthen decreased.
- solidmechanics,
- dynamicbehavior,
- dynamiccaustics,
- crackpropagation,
- notchedblasting,
- perforatedcrack