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New high‐speed tensile tester for polymer films
Author(s) -
Patterson Gordon D.,
Miller Wilfred H.
Publication year - 1960
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.1960.070041207
Subject(s) - materials science , oscilloscope , instrumentation (computer programming) , ultimate tensile strength , beam (structure) , composite material , stress (linguistics) , structural engineering , mechanical engineering , optics , computer science , engineering , physics , linguistics , philosophy , detector , operating system
Design characteristics are described of a rotating‐wheel tensile tester suitable for stressing a vertical specimen with a force of 115 kg. through a distance of 15 cm. in a velocity range of 10 to 730 m./min. with no more than 1% loss in velocity, thereby assuring constant speed of grip separation. Provision is made for specimens up to 7.5 cm. width in order to achieve multiaxial distributions of stresses which are important in bag failure and leading to the determination of critical strain rates. Instrumentation provides reliable triggering of stress and strain traces on a double‐beam oscilloscope. Straight‐line travel of the moveable specimen grip is assured by the use of tracks which restrain horizontal motions without hindering the desired vertical motion.