Interference Effect of Notches : 2nd Report, An Experimental Investigation on Interference Effect of Notches on Strengths and Deformation Properties of Notched Bar with Double U-Notches

概要

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An interference effect of notches on the strengths and deformation properties of rectangular and cylindrical specimens with double U-notches is investigated experimentally. The stress at which the tensile load vs. elongation curve begins to depart from its elastic slope also reduces due to the interference effect. The magnitude of the interference effect on this stress is the same degree as that on the general yield strength, and is not predicted on the basis of the interference effect on the elastic stress concentration factor although the plastic region near the notch root is much smaller at this stress level than at general yielding. The interference effect on the notch tensile strength of the material with both weak strain-hardening and small total elongation can be predicted accurately from that on the yield point load or on the general yield strength. The interference effect produces an X-shape extension of the plastic region. In the notch pitch range influencing the interference effect an inclined plane fracture occurs due to the X-shape extension of the plastic region.
一般社団法人日本機械学会の論文