TY - JOUR
T1 - Finite element simulation of restrained shrinkage cracking of cementitious materials
T2 - Considering moisture diffusion, aging viscoelasticity, aleatory uncertainty, and the effects of soft/stiff inclusions
AU - Saklani, Naman
AU - Wei, Zhenhua
AU - Giorla, Alain
AU - Spencer, Benjamin
AU - Rajan, Subramaniam
AU - Sant, Gaurav
AU - Neithalath, Narayanan
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/6
Y1 - 2020/6
N2 - Simulation of restrained ring shrinkage and cracking of cementitious materials in a multiphysics simulation framework (MOOSE) is discussed in this paper. The 3D numerical model analyzes residual stress development and crack initiation/propagation in cement pastes by applying an eigenstrain which varies over the depth of the specimen based on the relative humidity of the pores as moisture diffuses from the drying surface. The numerical modeling framework explicitly considers: (i) moisture diffusion that generates differential shrinkage along the depth of the specimen (ii) viscoelastic response of aging cementitious materials through a rate-type creep law based on generalized Maxwell model, (iii) isotropic damage model with Rankine′s criterion determining the failure initiation, and (iv) aleatory uncertainty-based distribution of tensile strengths of individual finite elements to account for statistical variability and associated microstructural size effects. The model is implemented for cement pastes containing compliant/stiff inclusions subjected to variable drying conditions. The numerical model can be used to compare the cracking propensity of different cementitious mixtures.
AB - Simulation of restrained ring shrinkage and cracking of cementitious materials in a multiphysics simulation framework (MOOSE) is discussed in this paper. The 3D numerical model analyzes residual stress development and crack initiation/propagation in cement pastes by applying an eigenstrain which varies over the depth of the specimen based on the relative humidity of the pores as moisture diffuses from the drying surface. The numerical modeling framework explicitly considers: (i) moisture diffusion that generates differential shrinkage along the depth of the specimen (ii) viscoelastic response of aging cementitious materials through a rate-type creep law based on generalized Maxwell model, (iii) isotropic damage model with Rankine′s criterion determining the failure initiation, and (iv) aleatory uncertainty-based distribution of tensile strengths of individual finite elements to account for statistical variability and associated microstructural size effects. The model is implemented for cement pastes containing compliant/stiff inclusions subjected to variable drying conditions. The numerical model can be used to compare the cracking propensity of different cementitious mixtures.
KW - Aleatory uncertainty
KW - Finite element simulation
KW - MOOSE framework
KW - Restrained shrinkage
KW - Smeared cracking
KW - Viscoelasticity
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U2 - 10.1016/j.finel.2020.103390
DO - 10.1016/j.finel.2020.103390
M3 - Article
AN - SCOPUS:85082130725
SN - 0168-874X
VL - 173
JO - Finite Elements in Analysis and Design
JF - Finite Elements in Analysis and Design
M1 - 103390
ER -