@article{oai:repo.lib.tut.ac.jp:00001235, author = {鈴木, 新一 and 河内, 雅弘 and 中島, 卓郎 and SUZUKI, Shinichi and KAWACHI, Masahiro and NAKAJIMA, Takurou}, issue = {520}, journal = {日本機械学會論文集. A編, Transactions of the Japan Society of Mechanical Engineers. A}, month = {Dec}, note = {A holographic optical system developed which is used to photograph fast propagating crack tips in PMMA. The cracks are in the opening mode and propagate at a speed of several hundred m/s. At a point during crack propagation in a PMMA plate specimen, illumination light beams, emitted from a pulsed ruby laser, enter into the specimen through its side boundaries. Total reflection occurs at the specimen's surfaces as the light beams travel throughout the inside. When the beams reach the opened crack light is emitted, and is recorded on a holographic plate as the object light. The optical system is applicable only to cracks whose surfaces are "mirror" like and which propagates through transparent specimens. The optical system, however, makes it possible to measure in every photograph the crack opening displacement as a function of distance form the tip, even near the tip where craze appears., ・rights:日本機械学会 ・rights:本文データは学協会の許諾に基づきCiNiiから複製したものである ・relation:isVersionOf:http://ci.nii.ac.jp/naid/110002377899/}, pages = {2402--2409}, title = {高速進展き裂開口変位の精密測定用パルスホログラフィ光学系}, volume = {55}, year = {1989} }