A three-scale cracking criterion for drying soils

• Autorzy: Hueckel T. , Mielniczuk B. , El Youssoufi M. S. , Hy L. B. , Laloui L.

Identyfikatory

DOI

10.2478/s11600-014-0214-9

• Języki publikacji: EN

Abstrakty

EN

Cracking is a most unwanted development in soil structures under-going periodic drying and wetting. Desiccation cracks arise in an apparent absence of external forces. Hence, either an internal, self-equilibrated stress pattern resulting from kinematic incompatibilities, or a stress resulting from reaction forces at the constraints appear as a cracking cause, when reaching tensile strength. At a mesoscale, tubular drying pores are considered in the vicinity of a random imperfection, inducing a stress concentration in the presence of significant pore suction. This approach allows one to use the effective stress analysis, which otherwise, away from the stress concentration, usually yields compressive effective stress and hence a physically incompatible criterion for a tensile crack. Recent experiments on idealized configurations of clusters of grains provide geometrical data suggesting that an imperfection as a result of air entry deep into the granular medium penetrates over 4 to 8 internal radii of a typical pore could yield a tensile effective stress sufficient for crack propagation

Słowa kluczowe

EN

drying; cracking; air entry; stress concentration; suction

PL

suszenie; pękanie; wlot powietrza; koncentracja naprężeń; zasysanie

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2014
• Tom: Vol. 62, no. 5
• Strony: 1049--1059
• Opis fizyczny: Bibliogr. 22 poz.

Twórcy

autor

Hueckel T.

• Duke University, Durham, USA

autor

Mielniczuk B.

• Institut de Radioprotection et de Surete Nucleaire, Saint-Paul-lez-Durance, France

autor

El Youssoufi M. S.

• Laboratoire de Mécanique et Génie Civ il de Montpelier, CNRS, Université de Montpellier 2, France

autor

Hy L. B.

• University of Toledo, Toledo, USA

autor

Laloui L.

• École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland

Bibliografia

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