THE TRUE STRESS-STRAIN PROPERTIES OF BRITTLE MATERIALS TO 5000F. Tenth Monthly Report | Zendy

C. D. Pears | Zendy

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THE TRUE STRESS-STRAIN PROPERTIES OF BRITTLE MATERIALS TO 5000F. Tenth Monthly Report

Author(s) -

C. D. Pears

Publication year - 1961

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/4023063

Subject(s) - pyrolytic carbon , materials science , graphite , composite material , brittleness , bending , stress (linguistics) , fatigue limit , flexural strength , chemistry , pyrolysis , linguistics , philosophy , organic chemistry

Runs on the zirconia-coated graphite established that the ultimate strength of this material is 30 to 100% greater than previously reported. This greater strength was apparently obtained because the gas bearings eliminate all bending moments in the specimens and the radiant heating provides more even and measurable temperatures. The ultimate strength of one pyrolytic graphite specimen was found to be over 33,600 psi at 4000 deg F. The performance of the resistance-heated furnace was very satisfactory. The gas bearings were dismounted, cleaned, plated, and are being reinstalled. Some limit switches were added to the load frame to provide protection from overtravel. (auth

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