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《Journal of Harbin Engineering University》 2007-12
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Scattering of SH-waves by a cylindrical inclusion with a disconnected curve and linear cracks emanating from the edge

QI Hui1,ZHAO Jia-xi1,LIU Dian-kui1,WANG Hui-wen1,2(1.College of Civil Engineering,Harbin Engineering University,Harbin 150001,China;2.Department Automobile Engineering,Heilongjiang Institute of Technology,Harbin 150001,China)  
The scattering of SH-waves by a cylindrical elastic inclusion with a semicircular disconnected curve in the upper part and linear cracks emanating from the edge in a homogeneous medium is discussed and the solution of the dynamic stress intensify factor was derived using Green's function and the complex function method.The whole space was divided into two parts,upper and lower.In the lower half,an appropriate Green's function for the present problem was constructed—the essential solution of a displacement field to an elastic half space containing a semi-cylindrical hill with a cylindrical elastic inclusion,which was subjected to an out-plane harmonic line source loading on its horizontal surface.Linear cracks were then constructed using the cutting method.Therefore the semicircular disconnected curve and the linear cracks could be generated by bounding the two parts together and then loaded with SH-waves.Finally,some examples and results of the dynamic stress intensify factor were given,and the influences of parameters,such as cylindrical elastic inclusion,incident waves and cracks are discussed.From the results,it is found that the disconnective curve has large impacts on the dynamic stress intensify factor(DSIF) of the linear cracks.
【Fund】: 黑龙江省自然科学基金资助项目(A0206)
【CateGory Index】: O346.1
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