対称断面上の特異点の研究 (第1報)

抄録

Research data of the singular point in the photoelastic experiment is insufficient, and there still remains a wide unexplored domain. This paper deals with an interesting conclusion reached by comparing experiments regarding the isotropic points along the symmetric section of centrally-concentrated loaded beams with the results of calculation. A single isotropic point is formed when the ratio of span to depth is 4.3, and two isotropic points are developed for all ratios greater than 4.5. No isotropic point exists for the ratios less than 4.3, but a single isotropic point appears again when the ratio is 0.8. Furthermore, this paper deals with the properties of isotropic points from the experiment described above.