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Type: Artigo de periódico
Title: R-curve Behavior In Notched Beam Tests Of Rocks
Author: Ferreira L.E.T.
Bittencourt T.N.
Sousa J.L.A.O.
Gettu R.
Abstract: The R-curve for sandstone is obtained from the load-crack mouth opening response of notched specimens subjected to three-point-bending. This approach is used to analyze the fracture behavior under monotonic and cyclic loading. The asymptotic limit of the R-curve compares well with the fracture toughness determined through an effective crack model. The analysis of the relaxation observed before the unloading-reloading cycles in the cyclic tests leads to the conclusion that the fracture toughness remains practically constant while the crack propagates slightly during the load drop. © 2002 Elsevier Science Ltd. All rights reserved.
Rights: fechado
Identifier DOI: 10.1016/S0013-7944(02)00064-4
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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