積層円板中の円形はく離の集中力による進展

概要

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Symmetrical bending of a circular laminated plate containing a disc shaped delamination is analyzed on the basis of the theory of a small deflection of plates. The plate is assumed to be simply supported at the edge and is bent by a point normal force applied at the center. Radial inplane forces induced by bending in the parts of the plate above and below the delamination are determined by regarding the cracked part as two lapped discs hinged at both edges. The compliance of the delaminated plate and the energy release rate are then derived. It is shown that, when the critical energy release rate concept of Griffith is adopted. the disc-shaped delamination grows under steadystate conditon. This prediction makes a contrast with the case of delaminations in laminated beams, where delamination grows under catastrophic manner.
社団法人日本機械学会の論文
1999-07-25