Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimentally validated meso-scale fracture modelling of mortar using output from micromechanical models
Abstract 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.
Experimentally validated meso-scale fracture modelling of mortar using output from micromechanical models
Abstract 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.
Experimentally validated meso-scale fracture modelling of mortar using output from micromechanical models
Zhang, Hongzhi (Autor:in) / Xu, Yading (Autor:in) / Gan, Yidong (Autor:in) / Schlangen, Erik (Autor:in) / Šavija, Branko (Autor:in)
18.02.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Experimentally validated multi-scale modelling scheme of deformation and fracture of cement paste
| British Library Online Contents | 2017
Experimentally validated multi-scale modelling scheme of deformation and fracture of cement paste
| British Library Online Contents | 2017