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Titolo:
Partition of plastic work into heat and stored energy in metals
Autore:
Hodowany, J; Ravichandran, G; Rosakis, AJ; Rosakis, P;
Indirizzi:
Boeing Co, Seattle, WA 98124 USA Boeing Co Seattle WA USA 98124Boeing Co, Seattle, WA 98124 USA CALTECH, Grad Aeronaut Labs, Pasadena, CA 91125 USA CALTECH Pasadena CA USA 91125 Grad Aeronaut Labs, Pasadena, CA 91125 USA Cornell Univ, Dept Theoret & Appl Mech, Ithaca, NY 14853 USA Cornell UnivIthaca NY USA 14853 heoret & Appl Mech, Ithaca, NY 14853 USA
Titolo Testata:
EXPERIMENTAL MECHANICS
fascicolo: 2, volume: 40, anno: 2000,
pagine: 113 - 123
SICI:
0014-4851(200006)40:2<113:POPWIH>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Keywords:
plastic work; heat; infrared detectors; dynamic; stored energy; cold work; high strain rates; Kolsky bar/SHPB;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Hodowany, J Boeing Co, Seattle, WA 98124 USA Boeing Co Seattle WA USA 98124 eing Co, Seattle, WA 98124 USA
Citazione:
J. Hodowany et al., "Partition of plastic work into heat and stored energy in metals", EXP MECH, 40(2), 2000, pp. 113-123

Abstract

This study investigates heat generation in metals during plastic deformation. Experiments were designed to measure the partition of plastic work intoheat and stored energy during dynamic deformations under adiabatic conditions. A servohydraulic load frame was used to measure mechanical properties at lower strain rates, 10(-3) s(-1) to 1 s(-1). A Kolsky pressure bar was used to determine mechanical properties at strain rates between 10(3) s(-1) and 10(4) s(-1). For dynamic loading, in situ temperature changes were measured using a high-speed HgCdTe photoconductive detector. An aluminum 2024-T3 alloy and alpha-titanium were used to determine the dependence of the fraction of plastic work converted to heat on strain and strain rate. The flowstress and beta for 2024-T3 aluminum alloy were found to be a function of strain but not strain rate, whereas they were found to be strongly dependent on strain rate for alpha-titanium.

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Documento generato il 27/10/20 alle ore 10:28:57