Evaluation of time-dependent fracture mechanics parameters of a moving crack in a viscoelastic strip

Citation
S. Yoneyama et al., Evaluation of time-dependent fracture mechanics parameters of a moving crack in a viscoelastic strip, JSME A, 42(4), 1999, pp. 624-630
Citations number
27
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
JSME INTERNATIONAL JOURNAL SERIES A-SOLID MECHANICS AND MATERIAL ENGINEERING
ISSN journal
1344-7912 → ACNP
Volume
42
Issue
4
Year of publication
1999
Pages
624 - 630
Database
ISI
SICI code
1344-7912(199910)42:4<624:EOTFMP>2.0.ZU;2-N
Abstract
The present work studies time-dependent stress fields around a moving crack tip in a viscoelastic strip and crack extension resistance. Photoviscoelas tic technique is employed for the evaluation of the time-dependent stress s tate around a crack tip. For the fringe pattern analysis, a new technique u sing an elliptically polarized white light, which can determine isochromati c and isoclinic parameters simultaneously from a colored image obtained by a single acquisition, is applied. The time-dependent stress intensity facto r K-I(*) which is extended for linearly viscoelastic materials is evaluated using a method based on least-squares. The results show that the proposed crack extension resistance K-I*(C) may be considered as a characteristic pr operty of the material under monotonically increasing load.