光彈性を利用する地圧測定法の改良

抄録

As the method of stress measurement reported in the previous paper was somewhat qualitative, we have continued to study to increase accuracy and reliability. By means of attaching a detachable compensator to the photo-elastic apparatus, the accuracy of determining stress in glass test pieces has been much elevated. There has arisen a necessity to investigate on the test piece again, corresponding to the improvement of the photo-elastic apparatus. Accordingly three kinds of test pieces have been investigated and the relation between the stress in the body of which stress is inquired and the stress in the glass test piece has been cleared out for each kind of test piece. We have discussed also on the method of attaching the test piece to an elastic body, which has much influence to the accuracy.