抄録
In this paper, the relation between the stress concentration factor and the depth of notch in U-notched tension bar is examined by means of the photoelastic method. According to the experimental results, the stress concentration factor does not always increase with increase of the depth of notch, but it is larger for notches of medium depth than for infinitely deep notches, the base radius of the notch and the minimum section of the bar being kept constant.
