Experimental study on the effect of initial compression-stress field on blast-induced crack behaviors
With self designed static dynamic loading setup which can produce initial static stress and dynamic blasting stress field in the specimenthe behaviors of blast induced crack in the dynamic static stress field were studied by caustics experiment and the effect of initial stress field
to the blastinduced crack was discussed.Two specimensone is applied nothing and the other is applied 4 direction pre compression loadingwere studied by caustics.It is established that the pre compression stresswhich is vertical to the crack propagation directionreduces the stress concentration
degree at crack tip and hinders the crack propagationbut the pre compression stresswhich is parallel to the crack propagation directionhas no influence on the crack propagation.
Keywords: blast-induced crack; caustics experiment; initial compression stress field; stress intensity factor(SIF)
Document Type: Research Article
Publication date: 15 April 2013
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