Bilinear softening parameters and equivalent LEFM R-curve in quasibrittle failure

Morel, S. and Lespine, C. and Coureau, J.L. and Planas Rosselló, Jaime and Dourado, N. (2010). Bilinear softening parameters and equivalent LEFM R-curve in quasibrittle failure. "Journal of Solids and Structures", v. 47 (n. 6); pp. 837-850. ISSN 0020-7683. https://doi.org/10.1016/j.ijsolstr.2009.11.022.

Description

Title: Bilinear softening parameters and equivalent LEFM R-curve in quasibrittle failure
Author/s:
  • Morel, S.
  • Lespine, C.
  • Coureau, J.L.
  • Planas Rosselló, Jaime
  • Dourado, N.
Item Type: Article
Título de Revista/Publicación: Journal of Solids and Structures
Date: March 2010
ISSN: 0020-7683
Volume: 47
Subjects:
Freetext Keywords: Quasibrittle fracture; R-curve; Cohesive zone model; Bilinear softening function; Energy distribution; Critical opening; Plateau value of the resistance; Cohesive fracture energy
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

For composites and adhesive joints, the determination of the cohesive zone parameters from Double Cantilever Beam specimens loaded with pure moments is now well established and documented. However, for quasibrittle materials used in Civil Engineering such as concrete or wood, the difficulty to apply a pure bending moment lies inappropriated the method used for composites. Nevertheless, the one-to-one correspondence which exists between the R-curve and the softening curve is here revisited and adapted for any kind of specimen geometry and for the bilinear approximation of the softening function, well-known to successfully describe the failure of a wide group of quasibrittle materials. It is shown that even though the connections between the cohesive parameters and the ‘equivalent LEFM’ R-curve are geometry and material dependent, their trends are preserved whatever the specimen geometry and the material are. The outline of a general estimation procedure of the cohesive zone parameters funded on the equivalent LEFM R-curve is proposed.

More information

Item ID: 8507
DC Identifier: http://oa.upm.es/8507/
OAI Identifier: oai:oa.upm.es:8507
DOI: 10.1016/j.ijsolstr.2009.11.022
Official URL: http://www.sciencedirect.com/science/journal/00207683
Deposited by: Memoria Investigacion
Deposited on: 17 Aug 2011 07:56
Last Modified: 20 Apr 2016 17:15
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