新品种“舞龙呢”的染色工艺探讨

本文通过对新品种“舞龙呢”织物的染色工艺与织物的原料、结构、规格等关系的探讨，结合生产实践经验，从原料与染料的合理选择，温度、染浴ｐＨ值及助剂等对阳离子改性涤纶长丝织物染色性能的影响，诸方面总结分析了“舞龙呢”染色工艺的关键所在。     

纤维缠绕复合材料固化制度实用设计研究（Ⅱ）

本文论述热固性复合材料固化制度的设计原则和基本方法,归纳长期积集累的经验、数据及国内外研究成果,列出相关的原材料热特性参数;重点讨论了厚壁复合材料结构固化过程中的温度滞后和过热的本质、危害及预防措施;同时介绍了三种固化制度模拟验证实验方法。     

Robocasting of dense 8Y zirconia parts: Rheology,printing, and mechanical properties

Advanced ceramics with complex geometry have become indispensable in engineering applications. Due to limitations of traditional ceramic fabrication processes, additive manufacturing represents a revolution for shaping and consolidation because of its unique capabilities for increasing shape complexity and reducing waste material. Among the additive manufacturing techniques, robocasting is often considered to yield fine and dense ceramic structures with geometrically complex morphology and high strength. Within this context, it is the objective to attain dense 8 mol% yttria-stabilized zirconia (8Y-ZrO₂) by evaluating the influence of solid loading and filament orientation on the physical and mechanical properties of sintered parts. In doing so, a printable ink was developed using an inverse-thermoresponsive hydrogel. Results revealed that ceramic charges of 67.5 and 70 wt% achieved the best balance regarding density, hardness, and compression strength. Furthermore, rectilinear geometry with a filament orientation at 45º displayed higher mechanical response than 0/90º and cylindrical ones.     

单层缠绕提升机改为双层缠绕时卷筒强度分析

分析了当单层缠绕式提升机改为双层缠绕时卷筒的强度不够,为提升机的技术改造提供了理论依据。     

张力卷取机在工程中的应用

着重介绍张力卷取机在冷轧带钢生产中的应用,并结合多年在设计和应用中遇到的实际问题,提出了一些很实用的解决问题的方法。特别提出了微量自动缩径卷筒在冷轧带钢卷取机上的应用效果。     

节能荧光灯管寿命的探讨

本文研究了节能荧光灯管整个生产过程中影响其寿命的因素，除了保证一定的真空度和真空卫生外，选取优质荧光粉，改进灯丝结构，采用质佳的电子粉，严格控制涂粉量，选取适当的充氩气量，对灯管的长寿命，高可靠是极其重要的。     

Influence of the filament winding tension on physical and mechanical properties of reinforced composites

In this experimental investigation the influence of the applied tow tension during filament winding on the physical and mechanical properties of glass-fibre reinforced polymeric composite tubulars, was studied. Pressure retaining tubular products used in the transportation/storage of fluids are generally subjected to a variety of loading conditions during their service life; thus tubular specimens were tested under different biaxial loading ratios. The stress/strain response was recorded and functional and structural failure envelopes were developed. These envelopes indicate the leakage and final failure characteristics of the components, respectively. The mechanical properties were analysed in conjunction with the measured physical properties: ‘fibre volume fraction’ and ‘effective wall thickness’. Experimental findings demonstrate that the component strength depends on the degree of fibre tensioning. Under fibre-dominated loading conditions, higher winding tension leads to an improved resistance against failure of tubular components, whereas under matrix-dominated loading failure is delayed by reduced fibre tensioning.     

Non-linear analysis of fiber-reinforced open conical shell panels considering variation of thickness and fiber orientation under thermo-mechanical loadings

Non-linear bending analysis of moderately thick laminated conical panels under various thermo-mechanical loadings and boundary conditions is presented using the generalized differential quadrature (GDQ) method together with the Newton–Raphson iterative scheme. The stiffness coefficients are assumed to be functions of the meridional and circumferential coordinates in panels for the realistic applications. In the first case of orthotropic open conical shell panels, the orientation of fibers are assumed to be in the meridional and circumferential directions. The stiffness coefficients of this type of fiber-reinforced panel are usually assumed to be constant. It is shown that due to the geometry of the conical surface, thickness of laminate will be changed along the meridional direction. The effect of stiffness variation on the non-linear response of panel is considered for the first time. In the second type, open conical shell panel can be made by cutting from a filament wound circular conical shell. In this case, thickness and ply orientation are functions of the shell coordinates. In this paper, different path definitions for variable stiffness filament wound shells are considered. The inclusion of this geometric complicating effect in large deformation analysis will add considerably to the complication and cost of a solution scheme. Paper presents some results to show when these assumptions have a significant effect on the end result. Assuming the effects of shear deformation and initial curvature, based on the first-order shear deformation theory (FSDT) and von Kármán-type of geometric non-linearity, the governing system of equations is obtained. Comparisons of the predictions with those available in the literature and finite element analyses show very good agreement. More results for panels with particular boundary conditions and thermo-mechanical load are presented for future references. For the sake of brevity, numerical results which presented in this paper are limited to deflection responses only.     

嵌入式夏季牛仔布用纱的开发

探讨应用嵌入式纺纱技术开发夏季轻薄牛仔布用纱的方法和效果.提出了嵌入式夏季牛仔布用纱的开发思路,通过选配原料、进行长丝卷装准备和细纱机相关设备改造、合理配置前纺和细纱工艺参数及采取必要的操作和质量控制措施,成功纺制出两种嵌入式复合纱.认为,应用嵌入式复合纺纱技术可开发出号数较细、强力较高、条干较好、耐磨性较强的嵌入式复合纱,较好地满足夏季牛仔布用纱的质量要求.     

特细号苎麻嵌入式复合纱的开发

探讨特细号苎麻嵌入式复合纱的开发要点。阐述了嵌入式复合纺纱的原理,通过在传统环锭细纱机上进行相关的技术改造及使用长丝卷绕设备,利用苎麻短纤维与水溶性维纶长丝成功纺制出12.7 tex嵌入式复合纱,并与同号传统环锭纺苎麻水溶性维纶短纤维伴纺纱进行了质量对比。由该纱织制的织物经退维处理后,可得到的4.9 tex苎麻纱轻薄织物。认为:苎麻水溶性维纶嵌入式复合纱结构稳定、强力较高、条干均匀、毛羽少、纱体光洁,提高了苎麻纱的服用性能,为开发高档麻类面料创造了更好的条件。