大赉水位站自记井工程围堰施工

结合大赉水位站自记井工程的工程实例,主要介绍了纤维砂袋围堰在工程中的应用,并通过后期防渗加固处理工程,总结了一些宝贵的经验,对以后类似工程的施工具有一定的指导意义。     

储液塑料容器注射模的特殊结构设计

分析了储液塑料容器的工艺特点 ,介绍了成型该塑件的注射模结构设计及一种特殊的圆周方向多型芯侧向抽芯机构 ,阐述了该模具的工作过程     

火焰喷塑材料的研究进展

阐述了火焰喷塑技术的发展历程，介绍了尼龙11、聚醚醚酮、聚烯烃等几种火焰喷塑材料的物理、化学性能及最新研究进展；指出了该领域今后的研究方向。     

The scratch hardness and friction of a soft rigid-plastic solid

The paper describes an experimental and analytical study of the normal and scratch hardnesses of a model soft rigid-plastic solid. The material known as ‘Plasticine’, a mixture of dry particles and a mineral oil, has been deformed with a range of rigid conical indentors with included angles of between 30° and 170°. The sliding velocity dependence of the computed scratch hardness and friction has been examined in the velocity range 0.19 mm/s to 7.3 m/s. Data are also described for the time dependence of the normal hardness and also the estimated rate dependence of the intrinsic flow stress. The latter values were estimated from data obtained during the upsetting of right cylinders. Three major conclusions are drawn from these data and the associated analysis. (1) A first-order account of the scratching force may be provided by adopting a model which sums the computed plastic deformation and interfacial sliding contributions to the total sliding work. This is tantamount to the adoption of the two-term non-interacting model of friction. (2) For this system during sliding, at high sliding velocities at least, the interface shear stress which defines the boundary condition is not directly related to the bulk shear stress. The interface rheological characteristics indicate an appreciable dependence on the imposed strain or strain rate. In particular, the relative contributions of the slip and stick boundary conditions appear to be a function of the imposed sliding velocity. (3) The computed normal and scratch hardness values are not simply interrelated primarily because of the evolving boundary conditions which appear to exist in the scratching experiments.     

PVC塑钢门窗性能及其异型材生产技术

介绍了ＰＶＣ异型材和塑钢门窗的性能，阐述了异型材的生产设备、工艺流程、配方设计和生产工艺。     

Anisotropic damage coupled to plasticity: Modelling based on the effective configuration concept

A model framework for anisotropic damage, that is kinetically coupled to inelastic deformations, is outlined. Key ingredients are the concept of the effective undamaged configuration and the assumption of energy equivalence. The pertinent rate equations for the chosen internal variables are integrated using the standard fully implicit scheme, and the Jacobian matrix of the resulting non‐linear incremental constitutive problem is used to compute the algorithmic tangent stiffness in straightforward fashion. Numerical results showing the effect of deformation‐induced anisotropy conclude the paper. Copyright © 2002 John Wiley & Sons, Ltd.     

塑料导爆管起爆感度的激光测定研究

塑料导爆管已被广泛应用于工业爆破工程.目前,塑料导爆管的起爆感度一般用一发标准雷管可引爆的一束并联塑料导爆管的爆炸百分比表示.影响测量结果的因素较多,误差较大.因为这个标准建立在半定量的描述的基础上,只能粗略地表示塑料导爆管被引爆的难易程度,不能提出能量是影响起爆感度的本质因素.文中提出用激光方法测定起爆所需的能量,并用这个能量标准准确地定量表示塑料导爆管的起爆感度.实验结果表明,用能量标准能科学准确地表示塑料导爆管的起爆感度,测量结果可靠.     

空间有限元数值模拟在边坡稳定分析中的应用

针对阜新海州露天矿非工作帮边坡岩体中的与边坡走向斜交的F东1断层附近岩体出现上盘上升、下盘下降的特殊变形，用空间有限元数值模拟法，对该区边坡的应力场、位移场和塑性区分布规律进行了计算分析．揭示了边坡岩体的变形机制；解释了开采对变形的影响及发展趋势；评价了整体边坡的稳定性．获得了与现场观测相一致的研究成果．     

Transverse plastic deformation of metal-matrix with randomly arranged continuous fibers

Within the framework of continuum plasticity theory, a numerical analysis in this investigation is made of the role of microstructures of fibrous composites against transverse plastic flow by means of the finite element method (FEM). In this way, the effective mechanical properties can be related quantitatively to the micro structures of composites reinforced by randomly arranged fibers. The effects of different cross-sectional geometry, such as the fiber shape (circular, square and lozenge), size, and random fiber distribution on the transverse elastic and plastic deformation of the metal-matrix composites with specific randomly distributed, aligned continuous fibers, are examined. Numerical results show that the overall transverse plastic flow of the composites is rather sensitive to the fiber geometric parameters while the elastic properties exhibit a much lower sensitivity to the fiber distribution. The interference of fibers with flow paths is seen from stress contours analysis to play an important role in the transverse strengthening due to the constraint imposed by the reinforcements. The calculations of the alterations in matrix field quantities in response to controlled changes in the random fiber distribution give valuable insights into the effects of fiber clustering on the transverse tensile properties.     

室温ARB技术制备超细晶铜板的研究

通过等效应变、轧制压下量和轧制温升的理论分析以及纯铜的变形试验，研究室温累积叠轧变形（accumulative roll bonding，ARB）制备超细晶铜板。结果表明，室温ARB变形可以获得超细晶板带材，纯铜6道次ARB变形后．平均晶粒大小约为0．5μm。