塑料布"V"形铺设法在水库引冰爬坡中的应用

通过塑料布“Ｖ”形铺设法在胜利水库引冰爬坡的应用与实践，证明了此法与传统贴坡式塑料布铺设法相 比，大大削减了冰推力对坝坡的破坏，减少了坝坡的修复费用，起到了良好的效果。     

一种确定化学调剖处理半径的新方法

针对目前化学调剖处理半径的确定方法存在误差大,无法满足现场需要的问题,利用平板可视模型,模拟研究了调剖剂在非均质油藏中的渗流特性以及调剖剂的分布形态,得到了处理半径与最终采收率增幅的关系。研究表明,处理半径为0.18~0.24井距时采收率增加幅度达到最大。在新疆L油田开展了现场试验,处理半径按0.2倍井距设计,取得了比较好的效果。研究结果对注水井调剖具有一定指导作用。     

激光在塑性变形测量中的应用

本文将激光应用于云纹法，研究了缺口滚压强化后根部区域的位移场及应变分布规律。结果表明，本方法是提高塑性变形测量精度的有效手段。     

桩柱式采金船每帮挖方量的理论计算

本文从理论上推导出了桩柱式采金船每帮挖方量计算的数学模型并，可广泛地用于设计与生产中，从而提高采金船设计的准确性，以及对生产矿山进行矿量、回收率和实收品位等采选指标收测的可靠性。     

高频等参数感应(ВИКИЗ)测井技术应用

介绍了高频等参数感应的基本原理。以胜利油田比较典型的 3口井为例 ,详细分析了高频感应资料在划分薄夹层、确定储层流体饱和类型、评价储层电阻率空间分布等方面的应用。研究结果表明 ,高频感应具有极高的纵向分辨率和较好的径向探测特性 ,能够准确计算地层真电阻率、侵入带电阻率及侵入半径 ,通过与常规感应及薄层测井资料的对比 ,论证了高频等参数感应在测井技术应用上的优越性     

废塑料裂化生产汽柴油工业化装置研究

报道了废塑料炼油工艺中连续法、间歇法、半连续法等各种方法的特点 ;重点对各工业化流程中存在的问题和解决的方法进行了讨论 ,并提出了一些合理化的建议。     

高层钢-钢骨混凝土混合结构的设计研究

结合一幢高层钢 钢骨混凝土混合结构的设计 ,着重介绍了在罕遇地震作用下采用层模型和空间模型的弹塑性分析计算结果、钢骨混凝土柱与钢梁的计算、节点设计及相应的构造措施 ,供结构工程师参考。     

Analysis of crack tip plasticity for microstructurally small cracks using crystal plasticity theory

Crack tip plastic zone sizes and crack tip opening displacements (CTOD) for stationary microstructurally small cracks are calculated using the finite element method. To simulate the plastic deformation occurring at the crack tip, a two-dimensional small strain constitutive relationship from single crystal plasticity theory is implemented in the finite element code ANSYS as a user-defined plasticity subroutine. Small cracks are modeled in both single grains and multiple grains, and different crystallographic conditions are considered. The computed plastic zone sizes and CTOD are compared with those found using conventional isotropic plasticity theory, and significant differences are observed.     

Homogeneous Plastic Flow of Fully Amorphous and Partially Crystallized Zr_(41.2)Ti_(13.8)Cu_(12.5)Ni_(10)Be_(22.5) Bulk Metallic Glass

The homogeneous plastic flow of fully amorphous and partially crystallized Zr(41.2)Ti(13.8)Cu(12.5)Ni(10)Be(22.5) bulk metallic glass (Vitl) has been investigated by compression tests at high temperatures in supercooled liquid region. Experimental results show that at sufficiently low strain rates, the supercooled liquid of the fully amorphous alloy reveals Newtonian flow with a linear relationship between the flow stress and strain rate. As the strain rate is increased, a transition from linear Newtonian to nonlinear flow is detected, which can be explained by the transition state theory. Over the entire strain rate interval investigated, however, only nonlinear flow is present in the partially crystallized alloy, and the flow stress for each strain rate is much higher. It is found that the strain rate-stress relationship for the partially crystaltized alloy at the given temperature of 646 K also obeys the sinh law derived from the transition state theory, similar to that of the initial homogeneous amo     

Diffusion in metallic glasses

Rutherfordα-particles backscattering technique was employed for measurements of diffusion rates in metallic glasses. Effects of relaxation, crystallization and plastic deformation on diffusion rates were also investigated. It has been observed that the diffusion rates of a metallic solute are of the same orders of magnitude in both metal-metal and metal-metalloid glasses. A higher diffusivity is likely if there is a large difference between melting points of the solute and matrix. Relaxation has no effect on diffusion, however, diffusivity increases on crystallization. An increase in diffusivity is also observed on plastic deformation of metallic glass.