Abstract
High molecular materials are generally used for many important structural members of machines, in spite of the present circumstances where the ductile fracture characteristics have not been sufficiantly known. The present study has been directed to determin the plastic strain concentration facter at the edge of a round-hole notch under the uniaxial stress field. Plastic strain concentration factors at the edge of around-hole notch were measured by photoelastic stress analysis technique under different tension rate. Concentration factors were calculated from results obtained and the experimental result was compared with the theoretical values. Fairly good agreement was found between them.
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