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| 基于近场动力学理论与声发射技术的钢材裂纹扩展中能量释放特征研究 |
| Characterization of Energy Release in Steel Crack Extension Based on Peridynamic Theory and Acoustic Emission Technique |
| 投稿时间：2024-04-15 修订日期：2024-06-14 |
| DOI： |
| 中文关键词: 近场动力学 声发射 损伤监测 钢材 能量释放 |
| 英文关键词:Peridynamics Acoustic emission Damage monitoring Steel Energy release |
| 基金项目:国家自然科学基金(52178274)资助项目. |
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| 中文摘要: |
| 为揭示钢材裂缝扩展过程中的能量释放特征，本文基于经典的钢材本构函数与近场动力学理论构建了钢材损伤的能量释放模型。基于所提出的模型对钢板在单轴拉伸过程的能量释放进行了数值模拟，并开展了声发射试验进行验证。通过对比数值模拟和试验中的损伤情况及能量释放特征，表明两者在裂纹发展过程和损伤因子曲线趋势上存在良好的一致性，并且最大误差不超过10%，验证了所提出计算公式的准确性。本文研究表明，将近场动力学理论与声发射技术结合，以能量释放为指标可以实现钢板损伤的有效监测。 |
| 英文摘要: |
| To reveal the energy release characteristics during steel crack propagation, an energy release model of steel damage is developed based on the classical steel principal function and peridynamic theory. Numerical simulations of energy release during uniaxial stretching of steel plates were conducted with the proposed model, and the results were verified by acoustic emission tests. By comparing the damage and energy release characteristics in numerical simulations and experiments, the two were found to be in good agreement in the crack development process and the trend of the damage factor curve. The accuracy of the proposed calculation formula was verified as the maximum error did not exceed 10%. This paper demonstrates that the combination of peridynamic theory and acoustic emission technology, using energy release as the index, can effectively monitor steel plate damage. |
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