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- W4387455181 abstract "The <I>J-A</I> two-parameter method proposed for the asymptotic analytical solution of type-I crack-tip field can effectively characterize the crack-tip stress field distribution and its constraint for power-hardening materials. This paper systematically summarizes commonly used methods for characterizing stress fields at crack tips. Taking the single-edged notched tension specimen as an example, the superiority of the J-A two-parameter method in characterizing the crack tip constraint of type I cracks is demonstrated. The <I>J-A</I> two-parameter method consists of three important parameters, including characteristic index, dimensionless integration constant and stress distribution angle function. Based on the existing high-order analytical solutions for the crack tip asymptotic field of power-hardening materials, a calculation program is compiled to compute these important parameters. High-precision empirical formulas for various parameters, ranging from low to high hardening levels, are obtained using the nonlinear fitting method with the determination coefficient R<sup>2</sup> reaching above 0.999. Finally, two methods for calculating the constraint parameter <I>A</I> are presented. It is found that using the fitting method to determine the constraint parameter <I>A</I> in the fracture control zone is more reasonable. A formula for directly calculating parameter <I>A</I> is also provided. Combined with the fitting formulas for the three parameters, the crack tip constraint of the single-edged notched tension specimen is calculated. Results show that the proposed calculation formulas can obtain crack tip constraint parameter <I>A</I> with high precision, facilitating the wide application of the <I>J-A</I> two-parameter method." @default.
- W4387455181 created "2023-10-10" @default.
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- W4387455181 date "2023-10-09" @default.
- W4387455181 modified "2023-10-11" @default.
- W4387455181 title "Approximate Solutions of Characteristic Parameters of Stress Field at Crack Tip in Power Hardening Materials" @default.
- W4387455181 doi "https://doi.org/10.57237/j.se.2023.05.002" @default.
- W4387455181 hasPublicationYear "2023" @default.
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