@article{oai:kanazawa-u.repo.nii.ac.jp:00009949,
 author = {広瀬, 幸雄 and 生水, 雅之 and 川岸, 雄一 and 佐々木, 敏彦 and 平島, 健一},
 issue = {1},
 journal = {材料=Journal of the Society of Materials Science, Japan},
 month = {Jan},
 note = {As one of optical methods, the method of caustics is useful for determining the stress intensity factor. In this paper, the method of caustics was applied to the specimens with an oblique crack. The results obtained are summarized as follows:(1)The method of caustics is a useful technique to determine the stress intensity factors K_I and K_<II> separately under mixed-mode loading. (2)The existing theory used for measurement of this method is effective only when the initial curve radius γ_0 is larger than the minimum initial curve radius γ_0^<min> determined in this study. It is recognized that the value of γ_0^<min> decreases as the ratio of K_<II> to K_I increases. (3)The 3-D stress field exists in the vicinity of crack tip, while the state of stress is nearly planestrain deformation in the case of mode I loading. In the case of mixed-mode loading, the state of stress is approximately plane-stress deformation as the ratio of K_<II> to K_I increases. (4)A correction is proposed to obtain the values of K from caustic images in the case of γ_0<γ_0^<min>., 金沢大学大学院自然科学研究科},
 pages = {131--136},
 title = {コースティックス法による混合モード荷重下における応力拡大係数の測定},
 volume = {45},
 year = {1996}
}