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Impact bending fatigue and impact response behavior of a nuclear-grade graphite beam

โœ Scribed by Masatoshi Futakawa; Kenji Kikuchik; Yasushi Muto; Heki Shibata

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
598 KB
Volume
28
Category
Article
ISSN
0008-6223

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โœฆ Synopsis

AMnet--Repeated impact bending tests have been carried out on a fine-pained isotropic graphite for HTIR under constant energy condition. Each specimen whose length differed was centrally impacted by an instrumented pendulum. The simple one-dimensional model taking the Hertzian contact stiffnesss into consideration has been applied to evaluate the relationship between the maximum stress of specimen generated by impact, the impact force, and the impact energy. It has been confirmed that the endurance curves in terms of impact energy are dependent on the length of the specimen, but the one in terms of the evaluated maximum stress is independent of that, and the strength of graphite is lower in impact fatigue than in nonimpact fatigue.

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