A study of the deformation properties of 10GN2MFA and 15Kh2MFA steels taking into account material damageability under plane stress conditions

IF 0.7 4区材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Strength of Materials Pub Date : 2024-02-27 DOI:10.1007/s11223-024-00607-x

P. O. Bulakh, O. M. Maslo

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Abstract

The paper presents the results of an experimental study of the deformation properties of 10GN2MFA and 15Kh2MFA steels at different ratios of principal stresses under cyclic loading conditions. Applying the proposed phenomenological approach of an improved elastic-viscoplastic model allows one to qualitatively describe the effects of the influence of structure degradation under the action of temperature and force factors that accompany the operation of actual structural elements significantly affecting the regularities of deformation and damageability and the strength of structural materials under combined stress conditions. An evaluation of the variation rate in the homogeneity of the studied steels at different ratios of principal cyclic stresses under cyclic creep conditions is presented. Based on the experimental results, correlation dependences between the relative values of the homogeneity coefficient and the function of the deformation properties of the material and the type of stress state were obtained, which significantly simplifies the determination of the parameters characterizing the limiting state of the structural element.

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考虑到平面应力条件下的材料破坏性，研究 10GN2MFA 和 15Kh2MFA 钢的变形特性

本文介绍了对 10GN2MFA 和 15Kh2MFA 钢在循环加载条件下不同主应力比的变形特性进行实验研究的结果。应用所提出的改进弹性-粘弹性模型的现象学方法，可以定性地描述在温度和力因素作用下结构退化的影响，这些因素伴随着实际结构元件的运行，对变形和可破坏性的规律性以及结构材料在组合应力条件下的强度产生了显著影响。本文对所研究钢材在循环蠕变条件下不同主循环应力比率下的均匀性变化率进行了评估。根据实验结果，获得了均匀性系数相对值与材料变形特性函数和应力状态类型之间的相关依赖关系，这大大简化了结构元素极限状态特征参数的确定。

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来源期刊

Strength of Materials MATERIALS SCIENCE, CHARACTERIZATION & TESTING-

CiteScore

1.20

自引率

14.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Strength of Materials focuses on the strength of materials and structural components subjected to different types of force and thermal loadings, the limiting strength criteria of structures, and the theory of strength of structures. Consideration is given to actual operating conditions, problems of crack resistance and theories of failure, the theory of oscillations of real mechanical systems, and calculations of the stress-strain state of structural components.