Ductile crack propagation path depending on material properties: Experimental results and discussions based on numerical simulations
Ductile crack propagation path depending on material properties: Experimental results and discussions based on numerical simulations
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取决于材料特性的延性裂纹扩展路径：基于数值模拟的实验结果和讨论
DOI：
10.1016/j.matdes.2022.111158
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Hatamoto Asato
中科院分区：
文献类型：
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作者：
Shibanuma Kazuki;Tu Shengwen;Suzuki Shota;Yu Zhuocheng;Kato Ryoma;Hatamoto Asato
为了确保先进薄板金属在工程应用中的结构完整性，有必要了解其延性裂纹扩展行为。在这项工作中，我们澄清的控制因素，韧性裂纹扩展路径的金属板材的综合调查与实验和数值方法。使用两种类型的金属板，钢和铝合金，实验与Arcan测试进行，并观察和分析的裂纹路径的差异。利用Arcan试验结果验证了作者提出的模拟韧性断裂的策略，并将其应用于基于数值模拟的参数化研究，以明确板材中韧性裂纹扩展路径的控制因素。应变硬化能力和延性图参数是控制延性裂纹扩展的主要因素。参数研究的结果解释了在两种材料的实验Arcan测试中观察到的裂纹路径的差异，从而阐明了逆向设计理念，该理念有助于材料设计以实现增强工程结构完整性的所需性能指标。
To ensure the structural integrity of advanced thin sheet metals in engineering applications, it is necessary to understand their ductile crack propagation behaviour. In this work, we clarified the governing factors for ductile crack propagation paths in sheet metals by the comprehensive investigation with experimental and numerical approaches. Using two types of sheet metals, a steel and an aluminium alloy, experiments with Arcan tests were performed, and the difference in the crack paths were observed and analysed. The strategy for simulating ductile fracture proposed by the authors was successfully validated with the experimental Arcan test results, and it was applied to a parametric study based on the numerical simulations for clarifying the governing factors for ductile crack propagation paths in sheet metals. The two factors, strain hardening ability and ductility diagram parameter, were confirmed to be dominant in controlling the ductile crack propagation. The findings in the parametric study explain the difference of the crack paths as observed in the experimental Arcan tests for the two materials, thus elucidating the inverse design philosophy that facilitates material design to achieve desired performance metrics in enhancing the integrity of engineering structures.