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Related Concept Videos

Microcracking in Concrete01:20

Microcracking in Concrete

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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...
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Behavior of Concrete Under Compressive Load01:23

Behavior of Concrete Under Compressive Load

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Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
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Tensile Strength Considerations of Concrete01:16

Tensile Strength Considerations of Concrete

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Considering the tensile strength of concrete involves recognizing that the theoretical strength of cement paste can be up to a thousand times higher than what is observed in practical applications. This significant discrepancy is largely attributed to the presence of microscopic cracks within the concrete. These cracks tend to amplify stress at their tips when a load is applied, a phenomenon explained by Griffith's theory of brittle fracture.
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Types of Non-structural Cracks in Concrete01:28

Types of Non-structural Cracks in Concrete

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Non-structural cracks are primarily of three types: plastic, early-age thermal, and drying shrinkage cracks. Plastic cracks are further classified into plastic shrinkage cracks and plastic settlement cracks.
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Stress-Strain Diagram - Brittle Materials01:24

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Brittle materials, including glass, cast iron, and stone, exhibit unique characteristics. They fracture without considerable change in their elongation rate, indicating that their breaking and ultimate strength are equivalent. Such materials also show lower strain levels at the point of rupture. The failure in brittle materials predominantly results from normal stresses, as evidenced by the rupture created along a surface perpendicular to the applied load. These materials do not display...
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X-ray Crystallography02:18

X-ray Crystallography

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The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
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Related Experiment Video

Updated: Jun 12, 2025

Crack Monitoring in Resonance Fatigue Testing of Welded Specimens Using Digital Image Correlation
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Critical crack length during fracture.

Viswakannan R K1, Subhadeep Roy1

  • 1Department of Physics, <a href="https://ror.org/014ctt859">Birla Institute of Technology and Science Pilani</a>, Hyderabad Campus, Secunderabad 500078, Telangana, India.

Physical Review. E
|September 19, 2024
PubMed
Summary
This summary is machine-generated.

Material strength inversely correlates with crack size in fiber bundle models. Maximum and critical cracks often differ, with distinct regions identified based on disorder and system size.

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Area of Science:

  • Materials Science
  • Statistical Mechanics
  • Computational Physics

Background:

  • Fiber bundle models are crucial for understanding material failure.
  • Local stress concentration significantly influences crack propagation.
  • Characterizing crack dynamics is key to predicting material strength.

Purpose of the Study:

  • To investigate the relationship between material strength and crack growth in a 1D fiber bundle model.
  • To differentiate between maximum and critical crack sizes.
  • To map regions of crack behavior based on disorder and system size.

Main Methods:

  • Controlled numerical simulations of a 1D fiber bundle model.
  • Analysis using Pearson correlation function.
  • Probabilistic study of individual system configurations.

Main Results:

  • An inverse correlation was found between material strength and both maximum and critical crack sizes.
  • Maximum and critical crack sizes frequently diverge, except at very low disorder strengths.
  • A phase diagram illustrates distinct regions based on disorder and system size, differentiating crack vulnerability.

Conclusions:

  • Material strength is intrinsically linked to crack dynamics, specifically maximum and critical crack sizes.
  • The interplay between disorder and system size dictates whether the largest crack is the most critical.
  • Understanding these crack behaviors is vital for predicting material failure.