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ICF15-Griffiths-Fracture-Theory-with-Size-Effect-4aaa2943ac151be1cb118b331a50ddd6.pdf
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🔗 Source: icf15.gatech.edu
📊 Size: 364 KB
📄 Pages: 2 pages
⬇️ Downloads: 96

Summary

The scale- or size-dependence of mechanical strength in brittle materials follows a 'universal law' of the form: strength µ L-n or V-n. Currently, there is no reliable scientific basis to explain this size effect. This work proposes a physical basis to explain the size-dependence of strength as µ L-0.5, based on the change in net-section strain energy due to an initial crack in a structure. The theory is validated using experimental data from over twenty different studies of ice, sandstone, coal, and concrete, providing accurate strength predictions for large structural scales. The size-independent behavior is also explained when the crack layer volume approaches the specimen volume. This work advances fracture mechanics beyond the Griffith crack theory.

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The scale- or size-dependence of mechanical strength in brittle materials follows a 'universal law' of the form: strength µ L-n or V-n.

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  • File Format: PDF
  • File Size: 364 KB
  • Pages: 2
  • Language: EN
  • Total Downloads: 96
  • Last Updated: 1 week ago

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