Izvorni znanstveni članak

https://doi.org/10.21278/TOF.483061923

A Fracture-Mechanics-Based Approach to the Analysis of the Structural Integrity of a Howitzer Cannon Barrel

Gašper Fašun ; SIJ Ravne Systems d.o.o., Ravne na Koroškem, Slovenia
Jožef Predan ; Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia
Nenad Gubeljak ; Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia

Sažetak

This study explores the determination of the critical crack depth in howitzer cannon barrels, which is essential for ensuring operational safety, particularly under high-pressure conditions during firing. The fracture-mechanics-based approach, emphasizing the stress intensity factor KI, is employed to evaluate crack propagation. Specifically, the R6 procedure is applied to assess the failure assessment diagram (FAD), crucial for identifying critical pressures concerning varying crack shapes and depths. The study examines the utilization of high-strength steel 35NiCrMoV12-5 in two distinct heat treatments (materials A and B). Experimental tensile tests and measurements of the critical stress intensity factor KIC were conducted on both materials. The Finite Element Method (FEM) using Abaqus/CAE software was used in combination with experimental results. The FEM model was used to analyses semi-elliptical cracks of different depths and two different shapes. Stress intensity factor distributions along the crack tip were derived, indicating the material resistance to crack propagation.

Ključne riječi

fracture mechanics; howitzer; failure assessment diagram; structure integrity assessment; finite element method

Hrčak ID:

318219

URI

https://hrcak.srce.hr/318219

Datum izdavanja:

19.6.2024.

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