TY - GEN
T1 - Numerical modeling of crack growth in quasibrittle structures under compressive fatigue
AU - Le, J. L.
AU - Eliáš, J.
PY - 2012/10/17
Y1 - 2012/10/17
N2 - This paper presents a numerical investigation on the mode-I crack propagation in quasibrittle structures under compressive cyclic loading based on a cohesive element model. The constitutive law of cohesive elements consists of a plastic-type model in compression and a strain-softening damage model in tension. Such a constitutive relation leads to the formation of a residual tensile zone at the crack tip upon unloading, which is responsible for cohesive fracture. The proposed model qualitatively agrees with the experimental observations. Furthermore, it is shown that the existing fatigue kinetics equation for tensile fatigue can be extended to compressive fatigue crack growth through a fracture process zone (FPZ) equivalence principle.
AB - This paper presents a numerical investigation on the mode-I crack propagation in quasibrittle structures under compressive cyclic loading based on a cohesive element model. The constitutive law of cohesive elements consists of a plastic-type model in compression and a strain-softening damage model in tension. Such a constitutive relation leads to the formation of a residual tensile zone at the crack tip upon unloading, which is responsible for cohesive fracture. The proposed model qualitatively agrees with the experimental observations. Furthermore, it is shown that the existing fatigue kinetics equation for tensile fatigue can be extended to compressive fatigue crack growth through a fracture process zone (FPZ) equivalence principle.
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M3 - Conference contribution
AN - SCOPUS:84874523793
SN - 9780415621267
T3 - Life-Cycle and Sustainability of Civil Infrastructure Systems - Proceedings of the 3rd International Symposium on Life-Cycle Civil Engineering, IALCCE 2012
SP - 1296
EP - 1302
BT - Life-Cycle and Sustainability of Civil Infrastructure Systems - Proceedings of the 3rd International Symposium on Life-Cycle Civil Engineering, IALCCE 2012
T2 - 3rd International Symposium on Life-Cycle Civil Engineering, IALCCE 2012
Y2 - 3 October 2012 through 6 October 2012
ER -