EFFECT OF WELDED JOINT IMPERFECTION ON THE INTEGRITY OF PIPE ELBOWS SUBJECTED TO INTERNAL PRESSURE

Utjecaj gresaka u zavarenom spoju na integritet cijevnih lukova izloženih djelovanju unutarnjeg tlaka Izvorni znanstvenu clanak Imajuci u vidu da lokalna ostecenja smanjuju nosivost i mogucnost deformiranja cjevovoda, analiziran je utjecaj gresaka u zavarenom spoju na integritet cijevnih lukova izloženih djelovanju unutarnjeg tlaka. Ispitivane su greske tipa neprovarenosti, jer su defekti ovog tipa prethodno otkriveni ultrazvucnim ispitivanjem na unutarnjoj povrsini cjevovoda u hidroelektrani. Trodimenzijska analiza metodom konacnih elemenata je urađena uporabom programskog paketa Abaqus. Određen je utjecaj geometrije defekta u zavarenom spoju (dubina, duljina i položaj) na integritet cijevnih lukova. Također je određen pad nosivosti u slucaju da postoji pukotina na dnu defekta. Ispitan je utjecaj tipa konacnih elemenata (rabljeni su elementi oblika heksaedra i tetraedra). Kljucne rijeci: cijev, cijevni luk, integritet konstrukcije, metoda konacnih elemenata, neprovarenost, zavareni spoj

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