TY - JOUR
T1 - Experimentally validated meso-scale fracture modelling of mortar using output from micromechanical models
AU - Zhang, Hongzhi
AU - Xu, Yading
AU - Gan, Yidong
AU - Schlangen, Erik
AU - Šavija, Branko
PY - 2020
Y1 - 2020
N2 - This paper presents a validation process of the developed multi-scale modelling scheme on mortar composites. Special attention was paid to make the material structure of real and virtual mortar specimens comparable at the meso-scale. The input mechanical parameters of cement paste (both bulk cement paste and interfacial transition zone) at the meso-scale were derived from results of micromechanical modelling through a volume averaging approach. Two constitutive relations for local elements were assumed and tested. By comparing with the experiments, the model using linear-elastic constitutive relation showed to be capable to reproduce the experimental load-displacement response satisfactorily in terms of the elastic stage and peak load. However, in the non-elastic stage a more realistic load-displacement curve can be simulated by considering the softening of cement paste using a step-wise approach. More importantly, the proposed multi-scale modelling scheme is validated by the experimental measurements. The proposed development offers the opportunity for the meso-scale model to become fully predictive.
AB - This paper presents a validation process of the developed multi-scale modelling scheme on mortar composites. Special attention was paid to make the material structure of real and virtual mortar specimens comparable at the meso-scale. The input mechanical parameters of cement paste (both bulk cement paste and interfacial transition zone) at the meso-scale were derived from results of micromechanical modelling through a volume averaging approach. Two constitutive relations for local elements were assumed and tested. By comparing with the experiments, the model using linear-elastic constitutive relation showed to be capable to reproduce the experimental load-displacement response satisfactorily in terms of the elastic stage and peak load. However, in the non-elastic stage a more realistic load-displacement curve can be simulated by considering the softening of cement paste using a step-wise approach. More importantly, the proposed multi-scale modelling scheme is validated by the experimental measurements. The proposed development offers the opportunity for the meso-scale model to become fully predictive.
KW - Discrete lattice model
KW - Fracture behaviour
KW - Mortar
KW - Multi-scale modelling scheme
UR - http://www.scopus.com/inward/record.url?scp=85081651724&partnerID=8YFLogxK
U2 - 10.1016/j.cemconcomp.2020.103567
DO - 10.1016/j.cemconcomp.2020.103567
M3 - Article
SN - 0958-9465
VL - 110
SP - 1
EP - 12
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
M1 - 103567
ER -