Investigation on the dynamic fracture behavior of A508-III steel based on Johnson–Cook model

IF 2.2 3区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Fracture Pub Date : 2023-08-19 DOI:10.1007/s10704-023-00735-6

Jianhua Sun, Guangshun Cui, Yilei Li, Chen Bao

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Abstract

In this study, the Johnson–Cook constitutive and failure model parameters of A508-III steel are determined through quasi-static and dynamic tensile and fracture tests. The reliability of model parameters is then verified by dynamic fracture tests at different loading rates. Using the Johnson–Cook model, the dynamic fracture behavior of the SEB specimen of A508-III steel under various loading rates and geometric configurations has been simulated. The effect of loading rate and specimen geometric configuration on the dynamic fracture toughness of A508-III steel is investigated. The results reveal that the critical fracture force and impact absorbed energy increase with the increase of loading rate. The dynamic fracture behavior of deep-cracked specimens is more sensitive to the loading rate than that of shallow-cracked specimens. Moreover, the critical fracture force and impact absorbed energy increase linearly with increasing specimen thickness while the initial crack size remains constant.

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基于Johnson-Cook模型的A508-III钢动态断裂行为研究

本研究通过准静态和动态拉伸和断裂试验，确定了A508-III钢的Johnson-Cook本构和失效模型参数。通过不同加载速率下的动态断裂试验，验证了模型参数的可靠性。采用Johnson-Cook模型，模拟了A508-III钢SEB试样在不同加载速率和几何形态下的动态断裂行为。研究了加载速率和试样几何形态对A508-III钢动态断裂韧性的影响。结果表明:临界断裂力和冲击吸收能随加载速率的增加而增大;与浅裂纹试件相比，深裂纹试件的动态断裂行为对加载速率更为敏感。临界断裂力和冲击吸收能随试样厚度的增加而线性增加，而初始裂纹尺寸保持不变。

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来源期刊

International Journal of Fracture 物理-材料科学：综合

CiteScore

4.80

自引率

8.00%

发文量

审稿时长

13.5 months

期刊介绍： The International Journal of Fracture is an outlet for original analytical, numerical and experimental contributions which provide improved understanding of the mechanisms of micro and macro fracture in all materials, and their engineering implications. The Journal is pleased to receive papers from engineers and scientists working in various aspects of fracture. Contributions emphasizing empirical correlations, unanalyzed experimental results or routine numerical computations, while representing important necessary aspects of certain fatigue, strength, and fracture analyses, will normally be discouraged; occasional review papers in these as well as other areas are welcomed. Innovative and in-depth engineering applications of fracture theory are also encouraged. In addition, the Journal welcomes, for rapid publication, Brief Notes in Fracture and Micromechanics which serve the Journal''s Objective. Brief Notes include: Brief presentation of a new idea, concept or method; new experimental observations or methods of significance; short notes of quality that do not amount to full length papers; discussion of previously published work in the Journal, and Brief Notes Errata.