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Fracture toughness of mixed-mode anticracks in highly porous materials

Author

Listed:
  • Valentin Adam

    (Technical University of Darmstadt
    WSL Institute for Snow and Avalanche Research SLF)

  • Bastian Bergfeld

    (WSL Institute for Snow and Avalanche Research SLF)

  • Philipp Weißgraeber

    (University of Rostock)

  • Alec van Herwijnen

    (WSL Institute for Snow and Avalanche Research SLF)

  • Philipp L. Rosendahl

    (Technical University of Darmstadt)

Abstract

When porous materials are subjected to compressive loads, localized failure chains, commonly termed anticracks, can occur and cause large-scale structural failure. Similar to tensile and shear cracks, the resistance to anticrack growth is governed by fracture toughness. Yet, nothing is known about the mixed-mode fracture toughness for highly porous materials subjected to shear and compression. We present fracture mechanical field experiments tailored for weak layers in a natural snowpack. Using a mechanical model for interpretation, we calculate the fracture toughness for anticrack growth for the full range of mode interactions, from pure shear to pure collapse. The measurements show that fracture toughness values are significantly larger in shear than in collapse, and suggest a power-law interaction between the anticrack propagation modes. Our results offer insights into the fracture characteristics of anticracks in highly porous materials and provide important benchmarks for computational modeling.

Suggested Citation

  • Valentin Adam & Bastian Bergfeld & Philipp Weißgraeber & Alec van Herwijnen & Philipp L. Rosendahl, 2024. "Fracture toughness of mixed-mode anticracks in highly porous materials," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-51491-7
    DOI: 10.1038/s41467-024-51491-7
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    References listed on IDEAS

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    1. Ebrahim Maghami & Jason P. Moore & Timothy O. Josephson & Ahmad R. Najafi, 2022. "Damage analysis of human cortical bone under compressive and tensile loadings," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 25(3), pages 342-357, February.
    2. J. Gaume & T. Gast & J. Teran & A. van Herwijnen & C. Jiang, 2018. "Dynamic anticrack propagation in snow," Nature Communications, Nature, vol. 9(1), pages 1-10, December.
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