Abstract
Based upon a three-dimensional computer-tomography of hardened cement paste, a finite-element mesh at micrometer length scale is introduced. Effective material properties are obtained through numerical homogenization techniques using representative volume elements. Statistical tests, two- and three-dimensional computations and a comparison with experimental data are shown. For the hydration products of hardened cement paste a visco-plastic constitutive equation of Perzyna type including isotropic damage is introduced. The inelastic material parameters are identified solving an optimization problem through a combination of a stochastic genetic algorithm and the deterministic Levenberg-Marquardt method. The time-consuming evaluations of the corresponding objective function are distributed within a network environment automatically.
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Hain, M., Wriggers, P. Numerical homogenization of hardened cement paste. Comput Mech 42, 197–212 (2008). https://doi.org/10.1007/s00466-007-0211-9
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DOI: https://doi.org/10.1007/s00466-007-0211-9