@article{oai:repo.lib.tut.ac.jp:00001222,
 author = {鈴木, 新一 and 末冨, 泰志 and 本間, 寛臣 and 草鹿, 履一郎 and SUZUKI, Shinichi and SUETOMI, Yasushi and HOMMA, Hiroomi and KUSAKA, Riichiro},
 issue = {500},
 journal = {日本機械学會論文集. A編, Transactions of the Japan Society of Mechanical Engineers. A},
 month = {Apr},
 note = {Pulsed holographic microscopy is applied to take an instantaneous microscopic photograph of the neighborhood of a crack tip propagating in a PMMA plate specimen at a speed of several hundred meters per second. From the photograph, crack opening displacements (COD) are measured in the vicinity of the crack tip, and the dynamic fracture toughness K_<ID> is calculated through the formula of COD in the singular stress field of a propagating crack. Two types of optical systems are used for holographic recording of cracks. The values of K_<ID> obtained through one optical system are in agreement with those obtained through the other. One of the holographic optical systems can simultaneously record the caustic of a fast propagating crack at a moment when the crack tip is recorded as a hologram. The value of K_<ID> caluculated from COD measurement is roughly in agreement with that from the caustic method., ・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/110002377588/},
 pages = {762--768},
 title = {動的破壊靱性値の新しい計測法 : パルスホログラフィ顕微鏡法を用いた高速進展き裂のCOD計測},
 volume = {54},
 year = {1988}
}