Abstract
The stress concentration problem in the linear, couple-stress theory is treated for a circular cylinder with arc-shaped annular groove etc. under uniaxial tension. The solution is the indirect fictitious-boundary integral which is expanded to solve the problems in the couple-stress theory. In this method, the unknown vector density functions, corresponding to concentrated forces and couples distributed over a fictitious-boundary supposed in an infinite medium, are determined so as to satisfy the requirements on a real-boundary. After all, the problem is reduced to solving Fredholm type integral equations.
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