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Fatigue crack propagation in biaxial compression-tension

Subramaniam, K.V. / Popovics, J.S. / Shah, S.P.

Rigid airport pavement structures are subjected to high-amplitute cyclic stresses resulting from passing heavy aircraft. It is of interest to model the response of plain portland cement concrete to such loading. There is a need to develop more accurate fatigue-based material models for concrete for implementation in mechanistic pavement design procedures. In this work, the uniaxial tension and biaxial compression-tension fatigue responses of concrete are investigated. The experimental results from the quasi-static and low cycle fatigue tests are presented. The damage mechanism owing to quasi-static loading is identified and the evolution of damage with repeated loading is monitored. The damage evolution in fatigue is shown to follow an S-shaped trend. The rate of damage accumulation is however shown to be a two-stage process. The fatigue failure of concrete is shown to be a local phenomenon like the failure in quasi-static loading, wherein the failure of the specimen is caused owing to crack propagation. The crack length at fatigue failure is shown to be predicted by the quasi-static failure envelope. Finally, a fracture-based fatigue failure criterion in terms of the quasi-static response is presented.

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Fatigue crack propagation in biaxial compression-tension

Subramaniam, K.V. / Popovics, J.S. / Shah, S.P.

Rigid airport pavement structures are subjected to high-amplitute cyclic stresses resulting from passing heavy aircraft. It is of interest to model the response of plain portland cement concrete to such loading. There is a need to develop more accurate fatigue-based material models for concrete for implementation in mechanistic pavement design procedures. In this work, the uniaxial tension and biaxial compression-tension fatigue responses of concrete are investigated. The experimental results from the quasi-static and low cycle fatigue tests are presented. The damage mechanism owing to quasi-static loading is identified and the evolution of damage with repeated loading is monitored. The damage evolution in fatigue is shown to follow an S-shaped trend. The rate of damage accumulation is however shown to be a two-stage process. The fatigue failure of concrete is shown to be a local phenomenon like the failure in quasi-static loading, wherein the failure of the specimen is caused owing to crack propagation. The crack length at fatigue failure is shown to be predicted by the quasi-static failure envelope. Finally, a fracture-based fatigue failure criterion in terms of the quasi-static response is presented.

Fatigue crack propagation in biaxial compression-tension

Subramaniam, K.V. / Popovics, J.S. / Shah, S.P.

Rigid airport pavement structures are subjected to high-amplitute cyclic stresses resulting from passing heavy aircraft. It is of interest to model the response of plain portland cement concrete to such loading. There is a need to develop more accurate fatigue-based material models for concrete for implementation in mechanistic pavement design procedures. In this work, the uniaxial tension and biaxial compression-tension fatigue responses of concrete are investigated. The experimental results from the quasi-static and low cycle fatigue tests are presented. The damage mechanism owing to quasi-static loading is identified and the evolution of damage with repeated loading is monitored. The damage evolution in fatigue is shown to follow an S-shaped trend. The rate of damage accumulation is however shown to be a two-stage process. The fatigue failure of concrete is shown to be a local phenomenon like the failure in quasi-static loading, wherein the failure of the specimen is caused owing to crack propagation. The crack length at fatigue failure is shown to be predicted by the quasi-static failure envelope. Finally, a fracture-based fatigue failure criterion in terms of the quasi-static response is presented.

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Title:

Fatigue crack propagation in biaxial compression-tension

Additional title:

Ermüdungsrißausbreitung bei biaxialer Druck-Zug-Belastung

Contributors:

Subramaniam, K.V. (author) / Popovics, J.S. (author) / Shah, S.P. (author)

Published in:

EUROMAT, EUROMAT, 1999 ; 112-118

Publication date:

2000

Size:

7 Seiten, 4 Bilder, 5 Quellen

ISBN:

DOI:

https://doi.org/10.1002/3527606211.ch15

Type of media:

Conference paper

Type of material:

Print

Language:

English

Keywords:

Portlandzement , Landebahn , Beton , Ermüdungsriss , Alterung (Werkstoff) , zyklische Belastung , Schadensakkumulation , biaxiale Beanspruchung , Rissausbreitung , COD (Crack Opening Displacement) , Zugdruckdauerversuch

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