强捻棉纱针织产品的性能研究

通过对强捻棉纱针织产品进行服用性能测试，得出强捻纱织物具有良好的服用性能。     

唐钢第二炼铁厂3#高炉开口机改造及效果

对唐钢第二炼铁厂3#高炉开口机的工作原理及其在工作中存在的问题进行了分析，通过对开口机四连杆机构、十路接头油管的改造，节约了大量的备件费用，具有较好的推广使用价值。     

Drying of Prone to Twist Boards in a Pre-Twisted Position

A method to minimize twist has been investigated; i.e., drying the boards in a pre-twisted position. It has been found that Norway spruce boards can be deformed toward straightness by this method. The force exerted by a board on its holders during drying in a pre-twisted position has been measured. When the variation in torsional stiffness as a function of temperature and moisture content is accounted for, it is found that a creep deformation of the board occurs both during the drying phase and the cooling phase. In addition to mechano-sorptive creep, a deformation released by a change in temperature also seems to occur.     

高强度聚乙烯纤维绳索的制备研究

研究了纤维的捻度及浸胶处理对超高相对分子质量聚乙烯 (UHMWPE)纤维力学性能及摩擦磨损性能的影响。结果表明 ,UHMWPE纤维的断裂强力随着纤维捻度的增加而减小 ,纤维浸胶处理后的断裂强力增大 ;当UHMWPE纤维中改性氯丁胶粘剂或聚氨酯胶粘剂的含量为 6%时 ,其断裂强力分别增加 17.2 %或 13 .9% ,聚氨酯胶粘剂处理过的UHMWPE纤维的耐摩擦磨损性能最好。     

Dispirations,disclinations, dislocations,and chain twist in polyethylene crystals

It is proposed that the twist in polyethylene chains that can result from crystallization and subsequent deformation aggregates at boundaries and becomes a template for further reorganization that results in the long period observed in polyethylene fibres. The observed lower density at the boundaries requires the transport of free volume to the twist boundaries. Dispirations, disclinations and dislocations are crystallographic defects that are involved in the necessary transport mechanism. Twist and bend, derived from the Eulerian angles which are computed from the sets of chain internal coordinates, relate the orientation of different segments of a chain. Twist and bend are useful for the characterization of both crystallographic defects and arbitrary conformations of polymer chains. Defects, along with folds, chain ends, and ordinary edge and screw dislocations provide a basis for interpretation of structure-property relationships in solid polyethylene.     

Design of a Medical Non‐Linear Drilling Device: The Influence of Twist and Wear on the Fatigue Behaviour of NiTi Wires Subjected to Bending Rotation

This paper considers fundamental and experimental aspects associated with the engineering design of a medical, non‐linear drilling device which exploits shape memory pseudoelasticity of NiTi wires. For this application it is important that the NiTi wires have a good fatigue resistance. This is why the present authors have previously determined the influence of various parameters on cyclic life, crack growth and stress state of pseudoelastic wires subjected to bending rotation fatigue. The actual drilling device has to withstand twist in addition to bending rotation because the free rotation is constrained by friction between the drill head and the bone material. In addition, friction between the wire and a NiTi guiding tube results in wear and this may well promote fatigue crack nucleation. In this paper, we explain the function of the medical drill. We then report results on the effect of the additional parameters (1) twist and (2) wear on the fatigue life of thin pseudoelastic NiTi wires. We finally discuss the implications of our experimental results for the design process of the medical drilling device.     

同向捻全毛薄花呢的设计与生产

从产品规格设计与工艺流程方面介绍了如何设计同向捻全毛薄花呢,并探讨了工艺流程及参数选择.     

两种消偏陀螺的轴向磁场灵敏度

运用琼斯矩阵,分别建立了轴向磁场作用下,单消偏陀螺系统和双消偏陀螺系统产生Faraday非互易相位差的理论模型.导出了两种系统的非互易相位差的表达式,并对其进行理论分析和仿真,最后给出两种系统轴向磁场作用下的实验结果.提出:采用双消偏系统并使得两个消偏器的45°误差之和趋于0,可以在很大程度上减小消偏陀螺的轴向磁场灵敏度.     

单模光纤环轴向磁场问题的理论研究

去偏光纤陀螺的非理想单模光纤,在垂直于光纤环面的轴向磁场作用下,由于Faraday 效应,在其中传播的正反两束光会产生一个与磁场有关的非互易相位差.本文基于单色光对在轴向磁场作用下的单模光纤环进行理论推导、分析,给出仿真结果和实验结果,并提出减小轴向磁场作用下的Faraday非互易相位差的方法.     

紧密赛络纺生产股线的技术

文章介绍了紧密赛络纺的纺纱原理,通过将紧密赛络纺股线与赛络纺股线、紧密纺单纱、普通环锭纺股线的质量进行对比,阐述了紧密赛络纺的纱线特征及其优越性。