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2018, vol. 46, br. 2, str. 230-237
Procena zaostalog napona prilikom zavarivanja trenjem aluminijumskih ploča pomoću akustične emisije i ultrazvučnih talasa
aAmirkabir University of Technology, Department of Mechanical Engineering, Iran
bDepartment of Industrial Engineering, Italy
cUniversity of Bristol, Department of Aerospace Engineering, UK
dAmirkabir University of Technology Department, of Mechanical Engineering, Iran
eUniversity of Bologna, Department of Mechanical Engineering, Italy

e-adresanavid.zarif@unibo.it
Ključne reči: residual stress; acoustic emission; ultrasonic stress measurement; sentry function; crest factor; friction stir welding
Sažetak
Procena zaostalog napona u strukturama je od suštinskog značaja za optimizaciju dizajna struktura. Pažnja ovog rada je fokusirana na to kako akustična emisija signala uzrokovana zatežućim naponom ulsed zavarivanja trenjem aluminiumskih ploča, utiče na promenu zaostalih napona. U tom cilju, distribucija zaostalih napona u dva trenjem zavarena aluminijumska sloja prvo su ocenjena ultrazvučnim merenjem napona. AE signali su tada proizvedeni tokom ispitivanja zatezanjem i snimljeni pomoću AE senzora. Dobijeni AE signali analizirani su korišćenjem statističkih karakteristika, uključujući krest faktor, kumulativni faktor kresta i funkciju. Utvrđeno je da se krest faktor može koristiti za identifikaciju prisustva zaostalih napona i da su trendovi funkcije u dobroj saglasnosti sa rezultatima krest faktora i kumulativnog krest faktora.
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O članku

jezik rada: engleski
vrsta rada: neklasifikovan
DOI: 10.5937/fmet1802230S
objavljen u SCIndeksu: 31.05.2018.
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