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66. The bridged crack model for the analysis of FRC elements under repeated bending loading

Title: 66. The bridged crack model for the analysis of FRC elements under repeated bending loading
Author(s): A. Carpinteri, S. Puzzi
Paper category : conference
Book title: 6th International RILEM Symposium on Fibre Reinforced Concretes
Editor(s): M. di Prisco, R. Felicetti and G.A. Plizzari
Print-ISBN: 2-912143-51-9
e-ISBN: 2912143748
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 767 - 776
Total Pages: 10
Nb references: 14
Language: English

Abstract: Two different nonlinear fracture mechanics models have been recently proposed and investigated for analysing the constitutive flexural behaviour of brittle-matrix fibrous composites: the bridged-crack and the cohesive-crack model [4,5]. In particular, the bridging option allowed attaining a complete analysis of the fracturing process and its stability in the case of monotonic increasing loading [1-3]. Only few works have theoretically addressed the problem of cyclic loading and hysteretic phenomena (elastic and plastic shake-down); up to now, only the cases of a single or double-fiber reinforced material have been explored [7-9]. In this paper, on the basis of the already developed bridged-crack model, the behaviour of a cracked beam with any number of reinforcing elements subjected to cycling loading in flexure is analysed. The values of plastic flow and shake down moments are computed for each fiber and particular attention is paid to the conditions of crack propagation stability. A central issue and a matter of ongoing research is the possibility to obtain a Paris' law for crack propagation without a tautological procedure. Eventually, a comparison with some experimental data from the literature is performed.

Online publication: 2004-08-30
Publication type : full_text
Public price (Euros): 0.00

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