The Dynamic Response of Circular Lining Structure and Multiple Cracks in Half Space under Impact Loading
The dynamic response of a circular lining structure and multiple cracks in an elastic half space while bearing impact loading is studied in this paper. This problem can be seen as the problem of defending of blast. The methods of Green's function, complex function and multi-polar coordinates are used here. First, the scattering wave which satisfies the condition of stress free on the ground surface of half-space containing a shallow-embedded circular lining structure impacted by incident SH-wave is constructed based on the symmetry of SH-wave scattering and the method of multi-polar coordinates system. Then a crack or multiple cracks in any position and direction can be constructed by Green's function and means of crack-division in half space. Finally the displacement field and stress field are established in the case of coexistence of circular lining structure and cracks, and the expression of dynamic stress intensity factor (DSIF) at the tip of crack is given. The interaction of inclusion and two cracks is chosen as numerical examples finally. According to nu-merical examples, the influences of different parameters on DSIF are discussed.
M.H Aliabadi, S. Abela, S. Baragetti, M. Guagliano and Han-Seung Lee
Z. L. Yang et al., "The Dynamic Response of Circular Lining Structure and Multiple Cracks in Half Space under Impact Loading", Key Engineering Materials, Vols. 417-418, pp. 713-716, 2010