Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) OHASI Yosio,Photoelastic Examination of Stress Concentration Factor for Strip with U-Notch under Pure Bending,Transactions of the Japan Society of Mechanical Engineers,00290270,The Japan Society of Mechanical Engineers,1959,25,159,1153-1159,https://cir.nii.ac.jp/crid/1390001205155134464,https://doi.org/10.1299/kikai1938.25.1153