REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

EXPERIMENTAL DETERMINATION OF FRACTURE MECHANICS PARAMETERS IN ELASTIC-PLASTIC CONDITIONS

bahrudin hrnjica

Faculty of Technical Engineering Bihać, University in Bihać, bhrnjica@outlook.com

fadil islamović

Faculty of Technical Engineering Bihać, University in Bihać, f.islam@bih.net.ba

dženana gačo

Faculty of Technical Engineering Bihać, University in Bihać, dzgaco@bih.net.ba

MERSIDA MANJGO

Faculty of Mechanical Engineering, University in Mostar, mersida.manjgo@unmo.ba

srđa perković

Military Technical Institute, Beograd, srdja.perkovic@vti.vs.rs

Abstract: The paper describes the procedure and method of experimental determination of fracture mechanics parameters in the condition of elastic-plastic fracture mechanics, EPFM, by testingSingle-edge notched bend, SENB specimen components of structural steel welded joint. A program was developed to determine the corrective value of the crack length (adjusted crack length) in the C# programming language. The results of experimental studies are presented in the form of J-R curves, and certain critical values of J integral J_Ic are determined.

Keywords: fracture mechanics, J integral, J-R curve, initial crack, SENB specimen.