Calcium fluoride can be used as mineralizer in the manufacturing of Portland cement clinker in order to decrease the temperature of clinkerization and/or increase the alite content of clinker.Also, by
Oil-Based Mud (OBM) cutting waste, generated by the petroleum and drilling companies during the process of crude oil drilling, is a common waste generated across many of the Arabian Gulf countries.Cur
Cement manufacture is one of the industries with high energy consumption.Presently it consumes approximately 2% of total world energy.In the process 80% of total energy consumption lies out on an obta
By using chemical analysis, mechanical property testing, petrographic analysis and XRD Rietveld method, the effects of doping sulfur and fluorine on the solid solubility of MgO, the strength, microstr
With adding certain fluoride, the effects of phosphorus on the solid solubility of MgO in high MgO cement clinkers, the strength and microstructure of the clinker samples were investigated by chemical
The contents of calcium sulphoaluminate (C4A3(S)) mineral were set as a series 5-20 percent and accordingly fixed tricalcium silicate (C3S) mineral contents at 30, 45, 60 percent respectively in alite
The poisoning of alkali metal salts in fly ashes on MnOx-TiO2 catalysts is one of the most important problems in the selective catalytic reduction (SCR) of NOx by NH3.In this work, MnOx-TiO2 catalysts
由超弹性材料(如橡胶和类橡胶材料)组成的圆柱管的翻转问题是一个经典的力学问题,其在工程设计,航空,生物医学等领域有着很广阔的应用前景.1949年,Rivlin首先考虑了不可压缩超弹性材料组成的圆柱管的翻转问题,并针对这种有限变形问题,得到如何选择本构关系以及求解平衡微分方程的常用方法.Truesdell,Haughton和Orr等人分别研究了不可压缩和可压缩圆柱管的翻转问题,并且分别利用复杂矩阵方
本文提出了一种适用于模拟纤维布在冲击荷载作用下变形和破坏的材料模型。该材料模型采用商业有限元软件LS-DYNA的用户定义材料子程序(UMAT)来实现，所需参数通过纤维布的单轴准静态和高应变率张拉试验、剪切试验和摩擦试验获得。为了验证该模型的准确性，我们采用了不同的有限元模型方案来模拟美国国家航空航天局(NASA)的弹道冲击试验。第一，采用单层壳单元和多层壳单元来模拟多层纤维布；第二，在多层壳单元模
Controlling electric polarization(or magnetization)in multiferroic materials with external magnetic fields(or electric fields)is very important for fundamental physics and spintronic devices.Although