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Local disturbances preceding a running crack front in a viscoelastic solid
Author(s) -
Kobayashi Akira,
Munemura Masayuki,
Ohtani Nobuo
Publication year - 1981
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1981.070260703
Subject(s) - viscoelasticity , quasistatic process , front (military) , strain (injury) , materials science , strain rate , mechanics , ranging , composite material , geology , meteorology , physics , thermodynamics , geodesy , anatomy , medicine
The local disturbances ahead of a running crack front in a viscoelastic solid were measured through noncontact electro‐optical tools. It was observed that the very high local strain rate up to 200/sec exists even in the present quasistatic loading case. It may be concluded that the running crack propagation velocities, not the conventional average strain rates ranging from about 10 −4 /sec to 10 −2 /sec, govern the local disturbances, as the crack propagation velocities always exceed 200m/sec for both average strain rates, while the local strain rates observed do not show much differences between both average strain rate cases.