Here, an efficient method is given to determine higher-order plastic stress
singularities of general antiplane V-notches in a power-law hardening material. Owing
to strong stress singularity, the notch tip regions arise in plastic deformation.
First, the asymptotic displacement field in terms of radial coordinate at the
notch tip is adopted. By introducing the displacement expressions into the
fundamental differential equations of the plastic theory, it results in a set of
nonlinear ordinary differential equations (ODEs) with the stress singularity
orders and the associated eigenfunctions. Then, the interpolating matrix
method is used to solve the eigenvalue problems of the ODEs by means of
an iteration process. Several leading plastic stress singularity orders of the
antiplane V-notches and cracks are obtained. The associated eigenvectors of the
displacement and stress fields in the notch tip region are simultaneously determined
with the same degree of accuracy. The validity and accuracy of the present
method are demonstrated by comparing with the existed results for the typical
examples.
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