Abstract
In this study, the notch effect of different types of 304 stainless steel rod notch is studied because of the problem of difficulty in measuring the notch root strain of 304 rod stainless steel, and the parameters of the annular notch root are analyzed. The notch angle, notch depth, and notch root radius are the main parameters of the stress field affecting the annular notch, and the mathematical expression of the strain rate concentration factor is derived. In order to verify the accuracy of the theory, the mechanical model of 304 stainless steel bar is established by finite element and numerical simulation calculation. The results show that the theoretical and finite elements have a high degree of agreement. When the notch angle increases, both theoretical and finite elements show a downward trend. When the notch depth of 304 stainless steel bar increases, both theoretical and numerical simulations show an increasing trend. The notch root radius of 304 stainless steel bar increases with decreasing numerical simulation.
Highlights
Introdution304 stainless steel is widely used in industrial application because of its good mechanical properties and corrosion resistance [1, 2]
The strain rate concentration factor was defined as the ratio of the strain rate in notched specimen to the strain rate in smooth specimen. e strain rate concentration factor is used to study the notch effect of different types of notch, and the proposed strain rate concentration factor theory is verified by numerical simulation. e use of appropriate notch can reduce the external load and energy consumption
Nine different types of notch modelings are first used in the analysis and calculation using ABAQUS software, the model is meshed, and the same grid parameters are set to ensure the reliability of the analysis results
Summary
304 stainless steel is widely used in industrial application because of its good mechanical properties and corrosion resistance [1, 2]. E notch produces stress concentration at its root due to strain concentration. Zhao [9] et al performed the analysis of different notch shapes based on the notch root stress field and found that the symmetric V-type notch is more suitable for the notch shape in industrial production. Conducted a study stress concentration coefficient based on different notch root radii. Nao-Aki et al [14,15,16] studied different notch geometries (notch depth and notch angle), temperature, ratio of notch parameters (notch root radius to bar diameter ratio, notch depth to bar net section radius, notch) e distance ratio between depth and notch axis and notch edge, the minimum section diameter of rod material, and the maximum section diameter ratio are studied in Advances in Materials Science and Engineering depth. E strain rate concentration factor is used to study the notch effect of different types of notch, and the proposed strain rate concentration factor theory is verified by numerical simulation. The strain rate concentration factor was defined as the ratio of the strain rate in notched specimen to the strain rate in smooth specimen. e strain rate concentration factor is used to study the notch effect of different types of notch, and the proposed strain rate concentration factor theory is verified by numerical simulation. e use of appropriate notch can reduce the external load and energy consumption
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