Publication de 6 numéros par an
ISSN Imprimer: 1543-1649
ISSN En ligne: 1940-4352
Indexed in
Eigendeformation-Based Homogenization of Concrete
RÉSUMÉ
A two-scale approach based on eigendeformation-based homogenization is explored to predict the behavior of concrete targets subjected to impact loading by high-speed projectiles. The method allows us to account for micromechanical features of concrete at a computational cost comparable to single-scale phenomenological models of concrete. The inelastic behavior of concrete is modeled using three types of eigenstrains. The eigenstrains in the mortar phase include pore compaction (or lock-in), rate-dependent damage, and plasticity eigenstrains, whereas the inelastic behavior of aggregates is assumed to be governed by plasticity only. Material parameters were identified using inverse methods against unconfined compression and uniaxial compression tests. A unit cell was constructed from a 3D digital image of concrete. The eigendeformation-based homogenization approach was validated for projectile penetration into a concrete target. The simulation results were found to be in reasonable agreement with the experimental data. Attention is restricted to nonreinforced concrete.
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Frew, D. J., Hanchak, S. J., Green, M. L., and Forrestal, M. J., Penetration of concrete targets with ogive-nose steel rods. DOI: 10.1016/S0734-743X(98)00008-6
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Gal, E. and Fish, J., Anisotropic Micromechanical creep damage model for composite materials: A reduced-order approach. DOI: 10.1615/IntJMultCompEng.v6.i2.10
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Gal, E., Yuan, Z., Wu, W., and Fish, J., A multiscale design system for fatigue life prediction. DOI: 10.1615/IntJMultCompEng.v5.i6.10
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Nagai, G. and Yamada, T., Three-dimensional finite element modeling for concrete materials using digital image and embedded discontinuous element. DOI: 10.1615/IntJMultCompEng.v4.i4.40
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Warren, T. L., Fossum, A. F., and Frew, D. J., Penetration into low-strength (23MPa) concrete: Target characterization and simulations. DOI: 10.1016/S0734-743X(03)00092-7
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Wu, J. Y., Li, J., and Faria, R., An energy release rate-based plastic-damage model for concrete. DOI: 10.1016/j.ijsolstr.2005.05.038
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Yuan, Z. and Fish, J., Hierarchical model reduction at multiple scales. DOI: 10.1002/nme.2554
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Yuan, Z. and Fish, J., Multiple scale eigendeformation-based reduced order homogenization. DOI: 10.1016/j.cma.2008.12.038
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Grigorovitch Marina, Gal Erez, Waisman Haim, Embedded unit cell homogenization model for localized non-periodic elasto-plastic zones, Computational Mechanics, 68, 6, 2021. Crossref
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Noorvand Hossein, Castro Samuel, Underwood Benjamin S., Kaloush Kamil E., Evaluating interaction of fibre reinforcement mechanism with mesostructure of asphalt concrete, International Journal of Pavement Engineering, 23, 5, 2022. Crossref