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A platform for research: civil engineering, architecture and urbanism
Fatigue Crack Propagation in Biaxial Compression‐Tension
Rigid airport pavement structures are subjected to high‐amplitude 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
Rigid airport pavement structures are subjected to high‐amplitude 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
Wittmann, F. H. (editor) / Subramaniam, Kolluru V. (author) / Popovics, John S. (author) / Shah, Surendra P. (author)
2000-04-20
7 pages
Article/Chapter (Book)
Electronic Resource
English
Fatigue Crack Propagation in Biaxial Compression-Tension
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