Modeling the effect of temperature and notch root radius on fracture toughness
Modeling the effect of temperature and notch root radius on fracture toughness
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DOI：
10.3389/fmats.2022.990314
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发表时间：
2022-09
期刊：
影响因子：
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通讯作者：
Yong Deng;C. Zhang;Jiaxing Shao;Weiguo Li
中科院分区：
文献类型：
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作者：
Yong Deng;C. Zhang;Jiaxing Shao;Weiguo Li
在这项工作中，一个基于物理的分析模型，没有任何拟合参数的断裂韧性依赖于温度的建议。建立了断裂韧性、熔点、杨氏模量、泊松比和温度之间的定量关系。在此基础上，研究了缺口根部半径对断裂韧性的影响，并建立了一个简单的理论模型来表征温度和缺口根部半径对断裂韧性的综合影响。实验测量和我们的模型预测之间取得了令人满意的协议。该研究不仅加深了我们对温度与断裂韧性之间定量关系的理解，而且为预测不同缺口根部半径下的温度相关断裂韧性提供了一个有力而方便的工具。
In this work, a physics-based analytical model without any fitting parameters for fracture toughness depending on temperature was proposed. The quantitative relationship between fracture toughness, melting point, Young’s modulus, Poisson’s ratio, and temperature was established. Furthermore, the effect of notch root radius on fracture toughness was investigated, and then we developed a simple theoretical model to characterize the combined effect of temperature and notch root radius on the fracture toughness. Satisfactory agreement between the available experimental measurements and our model predictions was achieved. This study not only advances our in-depth understanding of the quantitative relationship between the temperature and fracture toughness but also provides a powerful and convenient tool to predict the temperature-dependent fracture toughness at different notch root radius.