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Related Concept Videos

Fatigue01:21

Fatigue

229
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
229
Fatigue Strength of Concrete01:22

Fatigue Strength of Concrete

259
Fatigue, in the context of materials science and engineering, refers to the weakening or failure of a material caused by repeatedly applied loads, even if these loads are below the strength limit of the material. Fatigue strength in concrete is a critical property that influences its durability and longevity. Concrete can fail in two ways due to fatigue. Static fatigue or creep rupture occurs under a constant load or one that increases slowly. The other failure mode is due to cyclical or...
259
Microcracking in Concrete01:20

Microcracking in Concrete

194
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...
194

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Crack Monitoring in Resonance Fatigue Testing of Welded Specimens Using Digital Image Correlation
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Machine Vision-Based Fatigue Crack Propagation System.

Jan Gebauer1, Pavel Šofer1, Martin Jurek1

  • 1Department of Control Systems and Instrumentation, VŠB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic.

Sensors (Basel, Switzerland)
|September 23, 2022
PubMed
Summary

This study presents a low-cost machine vision system to detect fatigue crack propagation. The system uses an industrial camera, offering an alternative to traditional strain gauge sensors for monitoring material fatigue.

Keywords:
National InstrumentsVision Buildercrackmachine visionpropagationsurface crack

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Computer Vision

Background:

  • Fatigue cracks in components initiate at stress concentration points on surfaces.
  • Traditional methods like strain gauge sensors are often costly and complex.
  • Monitoring crack propagation is crucial for structural integrity and safety.

Purpose of the Study:

  • To introduce a cost-effective machine vision system for detecting fatigue crack propagation.
  • To propose an alternative to strain gauge sensor-based measurements.
  • To demonstrate the implementation and performance of the developed system.

Main Methods:

  • Development of a machine vision system utilizing an industrial camera.
  • Integration with specialized software for image processing and analysis.
  • Application of the system to samples exhibiting fatigue crack propagation.

Main Results:

  • Successful implementation of the machine vision system.
  • Demonstration of the system's capability to detect and monitor fatigue crack propagation.
  • Validation of the system's outputs against crack propagation samples.

Conclusions:

  • The machine vision system offers a promising low-cost solution for fatigue crack detection.
  • The system provides a viable alternative to conventional strain gauge methods.
  • Further application in industrial settings for monitoring component fatigue is suggested.