岩体界面效应的物理模拟

根据相似材料模拟试验结果，分析了地下开采后岩体移动的界面效应，研究了界面滑移量与工作面位置、采动程度等的关系，获得了界面滑移函数，为岩体内部移动计算提供了理论基础。     

Interfacial rheology of uniform polymer dispersions

The effects of high oscillatory shear on the viscosity of a model polymer dispersion of solid particles was investigated. A dispersion of glass beads in poly(dimethyl siloxane) (PDMS) is uniform and free of any agglomeration. When sheared at low stress levels, the dispersion remains uniform. At high stresses under oscillatory shear, two processes can take place. One is spatial ordering (threading) of the spherical beads that does not occur in steady shear. The other is molecular interfacial slip due to high interfacial stress in samples containing fluoro-silane treated glass beads, leading to a lower suspension viscosity than that of samples containing bare non-treated beads.     

多功能卷材防锈包装机的研制实践

介绍一种新型的多功能卷材防锈包装机的研制及实验,该机的研制难点在于实现多品种多规格的钢(铜)带卷、钢(铜)丝卷的多功能、多用途包装。     

组合桁架内力和变形的有限元计算与测试比较

为验证组合桁架有限元模型的准确性，寻求组合桁架内力和变位的分布规律，提供实际设计依据，对两榀测试组合桁架的内力、滑移、掀起和挠度进行电算和实测，电算值与实测值吻合良好。     

纯粘土边坡稳定性的解析计算

采用解析方法,建立了纯粘土边坡(0=j)圆弧滑裂时安全系数的解析表达式;利用函数取极值的条件,提出了通过求解一代数方程组来确定边坡的临界滑裂面和最小安全系数的方法;并计算了某些边坡的临界滑裂面和最小安全系数。     

航空发动机离合器试验台扭矩测控系统的实现

提出了一种由异步电动机实现扭矩加载和控制的新方法，不需扭矩传感器和专门的加载装置实现了扭矩的测量和控制。采用Fuzzy-PID控制算法代替常规PID算法，能较好地模拟离合器的磨合、接合和超越等性能试验。     

铝热连轧的基本规律、控制目标及生产特点

较为系统地分析了铝热连轧过程的基本规律，提出了铝热连钆过程的控制目标和生产特点。     

Dislocation structures in fatigued polycrystalline stainless steel

The dislocation structures produced in polycrystalline Fe-25Cr as a result of push-pull fatigue are described with reference to the Schmid factors of the active slip systems in different grains. The activity of the structures is discussed in relation to an etch which is indicative of localized shear activity. The ladder and labyrinth structures seen are compared with those which form in f.c.c. material.     

Influence of polyelectrolyte dispersant on slip preparation of nano-sized tetragonal polycrystals zirconia for aqueous-gel-tape-casting process

In this work, the conditions for the preparation of stable nanometer zirconia slurries with high solids content for the production of aqueous-gel-tape-casting objects with improved properties are identified. Influences of the powder and dispersant on the rheological properties were investigated. The result indicated the polyelectrolyte dispersant greatly affected the surface charge of nanometer tetragonal zirconia powder and the rheological behavior of nanoparticles zirconia’s suspensions. For each factor there exists an optimum range in which low viscosity was achieved for a slurry of high solid content. The proper content of the dispersant is between 0.8 and 1.2 wt.%. The rheology character of high solid loading slurries is non-Newtonian flow—‘shear-thinning’ character as the shear rate is increased. The viscosity of the 77 wt.% powder loading slurry with about 1.0 wt.% polyelectrolyte (based on the powder) was 0.35 Pa s at the shear rate of 110 s⁻¹. The slurry at the optimum conditions met the demands of aqueous-gel-tape-casting process.     

Slip Flow in Ducts

Slip flow in ducts occurs in many practical fluid transport situations. The method of eigenfunction expansion and collocation is used to solve the velocity distribution for slip flow in ducts of polygonal, elliptic and cuspidal cross sections. The friction factor‐ Reynolds number products are tabulated.