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

SIMULATION OF RESISTANCE AUTOFRETTAGE BARREL USING TO HUBER-MISES-HENCKY CRITERION

ALEKSANDAR KARI

Military Academy, University of Defence in Belgrade, karial@ptt.rs

saša dimitrić

Military Academy, University of Defence in Belgrade, sadranel@yahoo.com

ZORAN RISTIĆ

Military Academy, University of Defence in Belgrade

Abstract: The paper implemented a mathematical model of autofrettage pressure by HMH (Huber-Mises-Hencky) criterion of strength theories for barrel, strengthened by the autofrettage. The algorithm and software solution for determining the stress state and the safety factor in all layers of the barrel cross-section are made. Autofrettage procedure is performed neglecting of longitudinal strain σ_z. The calculation was made for the open weapon barrel with known material properties. Result is the calculation of the stress state of autofrettage barrel for cases of 30%, 60% and 100% autofrettage with the possibility of changing parameters. The simulation is performed on the example of 152 mm caliber weapon. The calculation results in a characteristic cross sections of barrel are shown in tables and graphs in a suitable scale.

Keywords: autofrettage, barrel, Huber-Mises-Henckey criterion, simulation.