Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Quasi-brittle porous material: Simulated effect of stochastic air void structure on compressive strength
Abstract The effect of porosity comprised of spherical air voids on the compressive strength of quasi-brittle material was studied via simulations. The simulated porous structures were based on pore size distributions of two mortar samples measured by X-ray microtomography. While the simulation method set practical limits on the size of sample, the base of the statistics was established by simulating 128 small structures generated by sampling from pore structures of two mortars. By studying the application of the classical strength-porosity formulas to the simulated data, a new simple model was formed. A linear relationship was achieved between the cubic root of air void fraction (porosity) and the simulated compressive strength. The reasons for scattering of simulated strength around fitted trend remained unresolved in this study; no clear dependence on pore number or other distribution properties was observed. With the presented simulation approach, the dependence of compressive strength on porosity is achieved independently of disturbances that occur in experimental studies creating understanding of compressional behavior of low porosity materials.
Graphical abstract Display Omitted
Highlights A simulation procedure to study the effect of porosity on the compressive strength of a quasi-brittle material is introduced Based on the simulated results, the relationship between compressive strength and air void fraction (porosity) is presented. A linear relationship was achieved between the cubic root of porosity and the simulated compressive strength.
Quasi-brittle porous material: Simulated effect of stochastic air void structure on compressive strength
Abstract The effect of porosity comprised of spherical air voids on the compressive strength of quasi-brittle material was studied via simulations. The simulated porous structures were based on pore size distributions of two mortar samples measured by X-ray microtomography. While the simulation method set practical limits on the size of sample, the base of the statistics was established by simulating 128 small structures generated by sampling from pore structures of two mortars. By studying the application of the classical strength-porosity formulas to the simulated data, a new simple model was formed. A linear relationship was achieved between the cubic root of air void fraction (porosity) and the simulated compressive strength. The reasons for scattering of simulated strength around fitted trend remained unresolved in this study; no clear dependence on pore number or other distribution properties was observed. With the presented simulation approach, the dependence of compressive strength on porosity is achieved independently of disturbances that occur in experimental studies creating understanding of compressional behavior of low porosity materials.
Graphical abstract Display Omitted
Highlights A simulation procedure to study the effect of porosity on the compressive strength of a quasi-brittle material is introduced Based on the simulated results, the relationship between compressive strength and air void fraction (porosity) is presented. A linear relationship was achieved between the cubic root of porosity and the simulated compressive strength.
Quasi-brittle porous material: Simulated effect of stochastic air void structure on compressive strength
Erkkilä, Anna-Leena (Autor:in) / Leppänen, Teemu (Autor:in) / Virkajärvi, Jussi (Autor:in) / Parkkonen, Joni (Autor:in) / Turunen, Leena (Autor:in) / Tuovinen, Tero (Autor:in)
02.10.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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