Uticaj zaostalih napona na ponašanje zavarenih spojeva i drugih nehomogenih materijala sa prslinama

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B. Međo M. Rakin O. Kolednik N. K. Simha F. D. Fischer

Apstrakt

Zaostali naponi u mnogim konstrukcijama nastaju tokom hlađenja u procesu proizvodnje ili spajanja materijala. Primeri su: zavareni i zalemljeni spojevi, kompoziti, materijali sa izraženom anizotropijom, prevlake i dr. Zaostali naponi u slučaju ovakvih materijala utiču na polje napona i deformacija u okolini vrha prsline i dovode do promene vrednosti sile rasta prsline u odnosu na materijal bez zaostalih napona. U ovom radu, uticaj zaostalih napona je analiziran metodom konačnih elemenata, primenom programskog paketa ABAQUS, uz korišćenje postprocesorskog programa razvijenog primenom metode konfiguracionih sila. Ovaj pristup je ranije primenjen na ispitivanje uticaja nehomogenosti mehaničkih osobina (modula elastičnosti, granice tečenja, koeficijenta deformacionog ojačavanja) na spojeve niskolegiranih čelika povišene čvrstoće, ali bez uzimanja u obzir nehomogenosti koeficijenta termičkog širenja materijala. Cilj ovog rada je analiza uticaja termički unetih zaostalih napona na silu rasta prsline u bimaterijalnim spojevima i korišćenje dobijenih rezultata za obezbeđenje integriteta i sigurnog rada zavarenih konstrukcija i struktura sastavljenih od više materijala.

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Kako citirati
MEĐO, B. et al. Uticaj zaostalih napona na ponašanje zavarenih spojeva i drugih nehomogenih materijala sa prslinama. Zbornik Međunarodnog kongresa o procesnoj industriji – Procesing, [S.l.], v. 21, n. 1, apr. 2024. Dostupno na: <https://izdanja.smeits.rs/index.php/ptk/article/view/7908>. Datum pristupa: 31 may 2024
Sekcija
Procesne tehnologije

Reference

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