A Tower Extensometer

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Volume 7, Issue 3 (May 1979)

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ISSN: 0090-3973
Page Count: 4

A Tower Extensometer
Findley, WN
Professor of engineering, Brown University, R.I.

Lepper, JK
Deputy division leader, Organic Materials Division, Lawrence Livermore Laboratory, Calif.

Abstract

A self-contained extensometer is described for rapid and highly accurate tension testing of several samples of rigid plastics over the entire range from zero load through fracture. The instrument has high sensitivity and linearity; negligible friction, backlash, and dead zone; a construction that permits installation after the specimen is located in the machine and that permits leaving the instrument on during fracture; and a design that averages the strain of the specimen. The instrument may also be used on metals whose hardness is significantly less than that of the gage points.

Keywords:
extensometers, tension tests, stresses, plastics testing, plastics extensometer, speed of testing, epoxy, stress-strain of epoxy

Paper ID: JTE11214J
DOI: 10.1520/JTE11214J
ASTM International is a member of CrossRef.

Author Title A Tower Extensometer Symposium , 0000-00-00 Committee E08

		Home Journals STPs Manuals Topics Subscriptions/Pricing Digital Library / Journals / Journal of Testing and Evaluation (JTE) / Citation Page Volume 7, Issue 3 (May 1979) Click here to download this paper now for $25 PDF (216K) View License Agreement ISSN: 0090-3973 Page Count: 4 A Tower Extensometer Findley, WN Professor of engineering, Brown University, R.I. Lepper, JK Deputy division leader, Organic Materials Division, Lawrence Livermore Laboratory, Calif. Abstract A self-contained extensometer is described for rapid and highly accurate tension testing of several samples of rigid plastics over the entire range from zero load through fracture. The instrument has high sensitivity and linearity; negligible friction, backlash, and dead zone; a construction that permits installation after the specimen is located in the machine and that permits leaving the instrument on during fracture; and a design that averages the strain of the specimen. The instrument may also be used on metals whose hardness is significantly less than that of the gage points. Keywords: extensometers, tension tests, stresses, plastics testing, plastics extensometer, speed of testing, epoxy, stress-strain of epoxy Paper ID: JTE11214J DOI: 10.1520/JTE11214J ASTM International is a member of CrossRef. Author Title A Tower Extensometer Symposium , 0000-00-00 Committee E08