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相关概念视频

Sound as Pressure Waves01:17

Sound as Pressure Waves

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Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
The pressure fluctuation depends on the difference in displacements between the successive points in the...
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相关实验视频

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A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
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在Split-Hopkinson压力棒实验中纠正应力波分散的开源算法

Arthur Van Lerberghe1, Kin Shing O Li1, Andrew D Barr1

  • 1School of Mechanical, Aerospace & Civil Engineering, University of Sheffield, Sheffield S1 3JD, UK.

Sensors (Basel, Switzerland)
|January 11, 2025
PubMed
概括
此摘要是机器生成的。

本研究介绍了SHPB_Processing.py以纠正分裂-霍普金森压力棒 (SHPB) 试验中的应力波分散. 纠正分散可以提高高应变率材料测试中的数据准确性和有效性.

关键词:
分散纠正纠正分散纠正高应变率测试的高应变率测试材料应用 材料应用这是一个开源的算法算法.信号处理 信号处理 信号处理分裂-霍普金森压力杆压力杆压力波浪的压力波浪.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 机械工程 机械工程
  • 波浪传播 波浪传播

背景情况:

  • 应力波散射在高应变率测试中会扭曲高频数据.
  • 精确的材料表征需要解决波浪分散效应.

研究的目的:

  • 在分裂-霍普金森压力棒 (SHPB) 实验中纠正应力波分散的好处.
  • 引入和验证一个新的计算算法用于分散校正.

主要方法:

  • 开发了一个创新的计算算法:SHPB_Processing.py.py.
  • 从,沙子和高粘土样本中处理的SHPB测试数据.
  • 用简单的时间转移方法比较分散校正的数据.

主要成果:

  • 分散校正消除了SHPB数据中的虚假振荡.
  • 观察到样品前部的测量准确度有所提高.
  • 在应力和应变结果中获得了更高的精度.

结论:

  • SHPB_Processing.py算法显著提高了高应变率测试结果的有效性,准确性和质量.
  • 该工具适用于各种涉及圆柱状条的延展率测试场景.
  • 未来的用例包括分散校正,限制分析和应力平衡分析.