@article{oai:nagasaki-u.repo.nii.ac.jp:00015887,
 author = {落合, 英俊},
 issue = {6},
 journal = {長崎大学工学部研究報告, Reports of the Faculty of Engineering, Nagasaki University},
 month = {Dec},
 note = {In direct shear tests, principal stress axes gradually rotate during the increase of shear stress τ under the constant normal stress σN. Besides, the strain increment in the horizontal direction is confined the condition of zero, wheares, it is not zero in the vertical direction. In this paper, by modifying the relationship between the stress ratio on the horizontal plane τ/σN and the inclination angle ψ of the major principal stress axis to the vertical direction, τ/σN=K, tan ψ, the principal stresses σ1, σ3 in the direct shear tests are determined and the behaviors of sands, which satisfy the plane strain condition, are quantitatively explained., 長崎大学工学部研究報告, (6), pp.95-102; 1975},
 pages = {95--102},
 title = {砂の直接セン断試験における主応が軸の回転とその応用},
 year = {1975}
}