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    Reproducing Kernel particle method in plasticity of pressure-sensitive material with reference to powder forming process

    , Article Computational Mechanics ; Volume 39, Issue 3 , 2007 , Pages 247-270 ; 01787675 (ISSN) Khoei, A. R ; Samimi, M ; Azami, A. R ; Sharif University of Technology
    Springer Verlag  2007
    Abstract
    In this paper, an application of the reproducing kernel particle method (RKPM) is presented in plasticity behavior of pressure-sensitive material. The RKPM technique is implemented in large deformation analysis of powder compaction process. The RKPM shape function and its derivatives are constructed by imposing the consistency conditions. The essential boundary conditions are enforced by the use of the penalty approach. The support of the RKPM shape function covers the same set of particles during powder compaction, hence no instability is encountered in the large deformation computation. A double-surface plasticity model is developed in numerical simulation of pressure-sensitive material.... 

    Effects of Mica and Feldspar as partial cement replacement on the rheological, mechanical and thermal durability of self-compacting mortars

    , Article Construction and Building Materials ; Volume 263 , December , 2020 Kohani Khoshkbijari, R ; Fard Samimi, M ; Mohammadi, F ; Talebitaher, P ; Sharif University of Technology
    Elsevier Ltd  2020
    Abstract
    In this experimental study, the impacts of replacing cement by Mica and Feldspar on rheological, mechanical and thermal durability of self-compacting mortars (SCMs) are investigated. The cement was partially replaced by Mica and Feldspar at the substitution rates of 10%, 20% and 30%. In general, 14 mix designs of SCMs were considered in two series with w/b ratios of 0.4 and 0.3. For assessment of rheological properties, mini-cone slump flow test and mini V-funnel tests were performed. The compressive strengths after 3, 7, 28 and 90 days of curing, and the 28-day flexural strength were obtained. All mixes were subjected to water absorption and sorptivity tests. For investigating the thermal...