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相关概念视频

Microcracking in Concrete01:20

Microcracking in Concrete

100
Microcracking in concrete refers to the tiny cracks that can form within the material even before any external load is applied. These microcracks typically occur at the interface between the coarse aggregate and the hydrated cement paste, often as a result of differential volume changes prompted by variations in stress-strain behavior, as well as thermal and moisture movement. Initially, these microcracks remain stable and do not grow substantially until the concrete is stressed to about 30...
100

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相关实验视频

Updated: Jun 4, 2025

Crack Monitoring in Resonance Fatigue Testing of Welded Specimens Using Digital Image Correlation
00:05

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基于激光超声波全场扫描数据的表面角裂的定量检测方法.

Chenwei Wang1, Rui Han1, Yihui Zhang1

  • 1State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, China.

Sensors (Basel, Switzerland)
|December 17, 2024
PubMed
概括

这项研究引入了一种使用激光超声波检测机械角度裂的定量方法. 该技术准确地测量了裂的宽度,角度和长度,提高了设备的安全性,并预测了使用寿命.

关键词:
全场扫描数据全场扫描数据激光超声波的使用方法定量检测方法的量化检测方法.表面的角度裂裂表面的角度裂.

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Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
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Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments
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相关实验视频

Last Updated: Jun 4, 2025

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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
  • 非破坏性测试 不破坏性测试

背景情况:

  • 关键机械部件的表面角裂存在重大运行安全风险.
  • 早期发现这些裂对于防止灾难性故障至关重要.

研究的目的:

  • 建议和验证使用全场扫描数据对表面角裂进行定量检测方法.
  • 准确确定裂宽度,角度和长度,以改进组件评估.

主要方法:

  • 使用激光超声波来获取全场扫描数据.
  • 分析超声波信号传播,包括雷利波,以量化裂纹特征.
  • 调查近场和远场超声波行为,并采用计算方法来确定角度和终点.

主要成果:

  • 实验验证证明了高精度,宽度,角度和长度测量的误差在5%以内.
  • 该方法成功量化了关键组件的表面角裂.
  • 确定了区分近场和远场超声波传播的关键点.

结论:

  • 拟议的定量检测方法对于表面角裂是可行的和有效的.
  • 这种技术使全面的组件状况评估,使用寿命预测和操作风险减轻成为可能.
  • 潜在的应用包括飞机发动机叶片和轮检查.