碳纤复合约束阻尼结构共固化成型及其性能研究

使用共固化成型工艺制备了含碳纤复合材料约束层的轻质约束阻尼结构,采用180°剥离强度测试、振动性能测试对结构界面结合强度、减振性能进行测试,并通过扫描电镜观测试样内部界面微观形貌。结果表明,所制备碳纤复合约束阻尼结构中约束层与阻尼层界面结合紧密,剥离强度接近5 k N/m,减振量超过19d B,结构减重50%以上,具备较高的应用价值。     

连续纤维增强热塑性复合材料的制备成型技术及其应用前景

介绍了连续纤维增强热塑性复合材料（ＣＦＲＴＰ）的材料组成,综述了ＣＦＲＴＰ的主要制备技术、成型方法以及应用前景。     

Advances in the fabrication of titanium based composites

Titanium alloy metal matrix composites reinforced with silicon carbide fibre are being evaluated for a range of highly loaded aerospace applications. Although expensive, if used selectively they can have a dramatic effect on performance and weight. The SMC has one of the strongest capabilities in Europe for the development and production of titanium fibre reinforced MMCs. Consisting of the DRA Sigma silicon carbide fibre manufacturing facility, producing fibre on a commercial basis, and the manufacture of titanium alloy MMCs in commercial quantities by the foil fibre route, and at pilot scale using the alternative matrix coated fibre route. In the foil fibre route a filament winding and fugitive binder method is used to produce a range of component shapes with excellent fibre distribution and consistent properties. The matrix coated fibre process is seen to have advantages over the alternative methods and is likely to become an important manufacturing route for titanium MMCs, particularly for exotic high temperature titanium alloys and intermetallics, and for shapes such as rings, tubes and shafts. As no titanium MMCs components have yet reached full production, it is unclear which of these fabrication methods will become commercially viable, if any. But, the choice is likely to be based on cost, availability and product quality.     

分布式的附网存储系统的设计与实现

设计并实现了一种高性能的分布式附网存储系统,并详细介绍了其工作原理、设计流程和主要程序段。     

网络存储技术的探讨

本文介绍了传统的依赖服务器存储的缺陷以及网络存储的现状,对附网存储及存储局域网技术进行了论述,把二者进行了比较,并总结出了二者优势和缺点,最后介绍存储局域网和附网存储的应用。     

SMC的制造工艺及成型技术

针对SMC在汽车工业中的应用,介绍了该塑料的材料选择、制造工艺、成型技术和急需研究开发的课题。     

The Transfer of Fibres in the Carding Machine

The problem of understanding the transfer of fibres between carding-machine surfaces is addressed by considering the movement of a single fibre in an airflow. The structure of the aerodynamic flow field predicts how and when fibres migrate between the different process surfaces. In the case of a revolving-flats carding machine the theory predicts a “strong” aerodynamic mechanism between taker-in and cylinder and a “weak” mechanism between cylinder and removal cylinder resulting in effective transfer in the first case and a more limited transfer in the second.     

Numerical analysis of multilayered CFRP retrofitted RC beams with partial interaction

This paper presents a theoretical model to simulate the behaviour of RC beams strengthened with multilayered CFRP matrix allowing for inter-layer slip. An element of the composite beam is assumed to be subjected to a system of forces that satisfy equilibrium and compatibility of deformations. The inter-layer slip is allowed for by relating the differential strain at the interfaces between the CFRP layers and the concrete to the longitudinal shear flow at the corresponding interface through the shear stiffness of the adhesive layer. The basic differential equations are derived in terms of displacement variables and solved numerically using finite differences. The results of the numerical simulation included slip values along the interfaces, maximum slip values, stresses and strains and deflections. The results compare reasonably well with experimental findings.     

梳棉针布的技术进步与选配应用

就国内外梳棉机锡林.道夫盖板、刺辊针布和固定分梳件的技术进步与发展趋势和针布配置一般原则进行了剖析,重点讨论了纺化纤的针布配置和难纺纤维工艺和针布调整问题对相关企业正确选择与使用针布有一定的参与作用。