Modares Mechanical Engineering

Modares Mechanical Engineering

Experimental Assessment of Ductile and Shear Fracture Criteria in Stainless Steel 304 According to Hooputra Model

Document Type : Original Research

Authors
Mohammad Albonasser 1
Hojjat Badnava 1
Sayed Hassan Nourbakhsh 2
1 Department of Mechanical Engineering
2 Shahrekord University
10.48311/mme.24.12.709
Abstract
The accurate prediction of crack initiation and growth in manufacturing processes is crucial for minimizing production costs and enhancing the reliability of components. This study focuses on integrated experimental investigation and fracture modeling approach for ductile metals, particularly addressing the mechanisms of ductile fracture and shear localization. The importance of establishing robust damage criteria for accurate reliable numerical simulations cannot be denied. Current literature reveals a significant lack of data on shear and ductile fracture criteria for materials like stainless steel alloy 304. To address this gap, a series of experimental tests was conducted to extract the necessary coefficients for these criteria. Various sample geometries were analyzed to investigate the effects of different triaxiality stress states and loading rates on fracture initiation. The triaxiality stress states were chosen within a range of 0.2 to 2 and strain rates were applied at values of 0.02 s-1, 4.5 s-1, and 30 s-1. A set of coefficients for modeling ductile and shear fracture was derived, taking into account the effects of loading rate and orientation. This research not only provides critical coefficients for fracture modeling but also supports the optimization of manufacturing processes in the automotive industry and other sectors, ultimately contributing to improved material performance and component reliability
Keywords
Ductile fracture
Shear fracture
Hooputra Model
stress triaxiality
loading rate

Subjects

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Modares Mechanical Engineering
Volume 24, Issue 12
November 2024
Pages 709-716