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Related Concept Videos

Fatigue01:21

Fatigue

299
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...
299
Fatigue Strength of Concrete01:22

Fatigue Strength of Concrete

338
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...
338
Microcracking in Concrete01:20

Microcracking in Concrete

249
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...
249

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Updated: Oct 25, 2025

Crack Monitoring in Resonance Fatigue Testing of Welded Specimens Using Digital Image Correlation
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Diagnostic Feature Extraction and Filtering Criterion for Fatigue Crack Growth Using High Frequency Parametrical

Ángela Angulo1,2, Cristinel Mares2, Tat-Hean Gan1,2

  • 1TWI Ltd., Granta Park, Great Abington, Cambridge, Cambridgeshire CB21 6AL, UK.

Sensors (Basel, Switzerland)
|August 10, 2021
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Summary

This study establishes filtering criteria for mooring systems, enabling early detection of fatigue crack growth stages. This helps differentiate noise from damage, providing crucial warnings for offshore asset integrity.

Keywords:
fatigue crack growthfiltering criterionhigh-frequency signalsmooring chainsparametrical analysissignal feature extraction

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Area of Science:

  • Offshore Engineering
  • Structural Health Monitoring
  • Materials Science

Background:

  • Mooring systems are critical for offshore assets, facing severe environmental conditions and cyclic loads.
  • Early detection and characterization of fatigue crack growth in these systems present a significant challenge.

Purpose of the Study:

  • To develop filtering and alarm criteria for different fatigue crack growth stages.
  • To evaluate recorded signals and their features for damage assessment.

Main Methods:

  • Analysis and definition of parametric limits for signal features.
  • Correlation of signal characteristics with crack growth stages.
  • Development of a filtering criterion to distinguish noise, initiation, and growth signals.

Main Results:

  • Successfully identified approaches to differentiate between noise, crack initiation, and growth-related signals.
  • Established a filtering criterion to support the identification of distinct crack growth phases.
  • Demonstrated the potential for early warning of potential damage in mooring systems.

Conclusions:

  • The developed filtering criterion effectively supports the identification of different crack growth stages and noise.
  • This approach provides a foundation for early warning systems for potential damage in offshore mooring systems.