Paper number 1323
|TWO-PARAMETER CHARACTERIZATION OF CRACK TIP FIELDS IN AN ANISOTROPIC PLATE UNDER BENDING|
F. Liang and F. G. Yuan
Department of Mechanical and Aerospace Engineering
North Carolina State University, Raleigh, NC 27695, USA
|Summary||Crack-tip fields in an anisotropic Reissner plate under bending are examined in this paper. An analysis has been conducted recently (Liang and Yuan, 1999) using stress functions to determine the asymptotic crack-tip fields for anisotropic plates. Two-term asymptotic crack tip fields, the leading singular term and non-singular constant stress term or called T-stress, in bending and transverse shear are presented. The path-independent J-integral in bending is used to relate the bending stress intensity factors. In conjunction with finite element analysis, two approaches to determine the T-stresses are reported based on the developed formulation in this paper. Comparison of two-term asymptotic solutions with leading term and finite element solutions in a finite plate under pure bending moment is provided. The coefficients of K1 and which are deduced from the methods can accurately characterize the crack-tip fields, although these coefficients are obtained from finite element results with larger element size.
Theme : Mechanical and Physical Properties ; Fracture Mechanics and Failure
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