Print Email Facebook Twitter A numerical study of fatigue of hardened cement paste at the microscale Title A numerical study of fatigue of hardened cement paste at the microscale Author Gan, Y. (TU Delft Materials and Environment) Zhang, Hongzhi (Shandong University) Liang, M. (TU Delft Materials and Environment) Schlangen, E. (TU Delft Materials and Environment) van Breugel, K. (TU Delft Materials and Environment) Šavija, B. (TU Delft Materials and Environment) Date 2021 Abstract In this study, a numerical model using a 2D lattice network is developed to investigate the fatigue behaviour of cement paste at the microscale. Images of 2D microstructures of cement pastes obtained from XCT tests are used as inputs and mapped to the lattice model. Different local mechanical and fatigue properties are assigned to different phases of the cement paste. A cyclic constitutive law is proposed for considering the fatigue damage evolution. Fatigue experiments performed at the same length scale are used to calibrate and validate the model. The proposed model can reproduce well the flexural fatigue experimental results, in terms of S-N curve, stiffness degradation and residual deformation. The validated model is then used to predict the uniaxial tensile fatigue fracture of cement paste. The effects of microstructure and stress level on the fatigue fracture are studied using the proposed model. This model forms a basis for the multiscale analysis of concrete fatigue. Subject Cement pasteFatigueLattice modelMicroscale simulation To reference this document use: http://resolver.tudelft.nl/uuid:e9a906ea-7fd7-46b8-a2d7-005d417b8fe8 DOI https://doi.org/10.1016/j.ijfatigue.2021.106401 ISSN 0142-1123 Source International Journal of Fatigue, 151 Part of collection Institutional Repository Document type journal article Rights © 2021 Y. Gan, Hongzhi Zhang, M. Liang, E. Schlangen, K. van Breugel, B. Šavija Files PDF 1_s2.0_S0142112321002619_main.pdf 10.78 MB Close viewer /islandora/object/uuid:e9a906ea-7fd7-46b8-a2d7-005d417b8fe8/datastream/OBJ/view