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Diffusion coefficient and infinitesimal shrinkage strain of a Strain-Hardening Cement-Based Composite (SHCC) determined by inverse analysis of experiments
https://orcid.org/0000-0001-8379-7809
Abstract The moisture transport and drying shrinkage properties of a certain type of Strain-Hardening Cement-Based Composite (SHCC) are investigated. This material is characterized by the usage of short high-modulus polymeric fibers as reinforcement of a cementitious mortar matrix with comparatively small grain sizes. The drying-induced mass loss and length change of circular cylindrical specimens with a radius of 25 mm have been measured. By inverse analysis of the experiments utilizing an evolutionary optimization algorithm, the material-specific transport and drying shrinkage parameters were identified. A sensitivity analysis revealed that the model assumptions concerning the mechanical material behavior, incorporating damage and creep, had only a small influence on the present inverse analysis results. It was also concluded that for the investigated type of material and the chosen geometry, the directly measured steady-state specimen contraction appropriately describes the material-specific drying shrinkage behavior.
Highlights Infinitesimal shrinkage of SHCC may be determined by inverse analysis. Evolutionary optimization method accurately fits simulation to experimental results. For small cross-sections, global shrinkage nearly equal to infinitesimal shrinkage.
Diffusion coefficient and infinitesimal shrinkage strain of a Strain-Hardening Cement-Based Composite (SHCC) determined by inverse analysis of experiments
https://orcid.org/0000-0001-8379-7809
Abstract The moisture transport and drying shrinkage properties of a certain type of Strain-Hardening Cement-Based Composite (SHCC) are investigated. This material is characterized by the usage of short high-modulus polymeric fibers as reinforcement of a cementitious mortar matrix with comparatively small grain sizes. The drying-induced mass loss and length change of circular cylindrical specimens with a radius of 25 mm have been measured. By inverse analysis of the experiments utilizing an evolutionary optimization algorithm, the material-specific transport and drying shrinkage parameters were identified. A sensitivity analysis revealed that the model assumptions concerning the mechanical material behavior, incorporating damage and creep, had only a small influence on the present inverse analysis results. It was also concluded that for the investigated type of material and the chosen geometry, the directly measured steady-state specimen contraction appropriately describes the material-specific drying shrinkage behavior.
Highlights Infinitesimal shrinkage of SHCC may be determined by inverse analysis. Evolutionary optimization method accurately fits simulation to experimental results. For small cross-sections, global shrinkage nearly equal to infinitesimal shrinkage.
Diffusion coefficient and infinitesimal shrinkage strain of a Strain-Hardening Cement-Based Composite (SHCC) determined by inverse analysis of experiments
https://orcid.org/0000-0001-8379-7809
Abstract The moisture transport and drying shrinkage properties of a certain type of Strain-Hardening Cement-Based Composite (SHCC) are investigated. This material is characterized by the usage of short high-modulus polymeric fibers as reinforcement of a cementitious mortar matrix with comparatively small grain sizes. The drying-induced mass loss and length change of circular cylindrical specimens with a radius of 25 mm have been measured. By inverse analysis of the experiments utilizing an evolutionary optimization algorithm, the material-specific transport and drying shrinkage parameters were identified. A sensitivity analysis revealed that the model assumptions concerning the mechanical material behavior, incorporating damage and creep, had only a small influence on the present inverse analysis results. It was also concluded that for the investigated type of material and the chosen geometry, the directly measured steady-state specimen contraction appropriately describes the material-specific drying shrinkage behavior.
Highlights Infinitesimal shrinkage of SHCC may be determined by inverse analysis. Evolutionary optimization method accurately fits simulation to experimental results. For small cross-sections, global shrinkage nearly equal to infinitesimal shrinkage.
Diffusion coefficient and infinitesimal shrinkage strain of a Strain-Hardening Cement-Based Composite (SHCC) determined by inverse analysis of experiments
Wang, Penggang (author) / Villmann, Beate (author) / Han, Xiaofeng (author) / Slowik, Volker (author) / Zhao, Tiejun (author)
2021-09-09
Article (Journal)
Electronic Resource
English
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