Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1988-02-17
1989-07-11
Levy, Stewart J.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73856, G01N 302
Patent
active
048459976
ABSTRACT:
A novel mechanical testing grip is disclosed which accounts for both eccentricity between the load cell and cross head, as well as machining tolerances in the specimen. The device includes a ball and socket joint disposed between two alignment members and secured by connecting members. The connecting members have curved elements for contacting correspondingly curved apertures of the alignment members so that substantially no extra force is exerted upon the test specimen. The grip does not require any heating or excessive waiting periods prior to conducting a mechanical test and can reduce the misalignment of a mechanical test specimen below about 0.02.degree. from the load axis.
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Z. Wang, Fatigue Behavior of 70-30 Alpha Brass: Pauschinger Effect and Surface Behavior in Single Crystals and High Cycle Fatigue Crack Formation at Twin Bounderies, Doctoral disertation, Polytechnic Institute of New York, Jan., 1986, Microfilm recording at University Microfilms, 30 M. Zeeb Rd., Ann Arbor, Mich. 48106.
Radin Alexander
Wang Zhirui
Levy Stewart J.
Raevis Robert R.
Trustees of the University of Pennsylvania
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