Durability of Stress Ribbon Bridge Checked during Loading Test

Stress ribbon bridges have many advantages and became recently more popular mostly because of their versatile form, slender decks giving a light aesthetic impression and durability assured by post tensioned concrete. The paper presents the first in Poland stress Ribbon Bridge constructed last year. A static and dynamic analyse of the model is presented as well as construction solutions which were used to achieve the highest durability. The bridge was checked during static and dynamic load test. The results of this prove test were compared with results obtained from examination and study of other different bridge structures. It confirmed that the bridge has good dynamic resistance and greater stiffness than assumed in the design.     

熔体快淬Zr(V1-xFex)2 (x=0.15)合金的贮氢性能

采用非自耗真空电弧炉熔炼制备Zr(V1-xFex)2(x=0.15)母合金锭,利用单辊旋淬设备制得不同淬速的合金薄带。X射线衍射结果表明,不同淬速Zr(V1-xFex)2(x=0.15)合金均为近乎单相的C15型Laves相,熔体快淬工艺可消除铸态合金中的包晶反应残留相和枝晶偏析,得到均匀细晶组织。快淬Zr(V1-xFex)2(x=0.15)合金吸氢后的晶体结构未发生改变,饱和吸氢后的体胀率约20%,根据V’antHoff关系外推出室温下快淬合金的平衡压力低于10-5Pa量级。     

浪形轴承保持架正反面离心分离装置

为了分离一些具有正反形状特征且具有导磁性能的零件,以保持架为例,利用离心分离原理,根据保持架正反面在不同正压力下摩擦力的不同,设计了一种离心分离装置。为了验证在不同的磁场力作用下保持架的正压力变化状态,采用Ansys软件对其进行建模及仿真分析,分析结果验证了离心分离方法的可行性。     

Dy元素对纳米复合(Nd,Pr)_(10.5-x)Dy_xFe_(83.5)B_6合金磁性能与显微结构的影响（英文）EI北大核心CSCD

采用快淬法制备了镨基(Nd,Pr)10.5-x Dyx Fe83.5B6(x=0.0,0.5,1.0,1.5,2.0,2.5)系列粘结磁体,研究了Dy元素添加对快淬合金显微组织结构、磁性能及快淬薄带热稳定性的影响。与Nd2Fe14B相比,硬磁相Dy2Fe14B具有较高的磁晶各向异性场HA和较低的饱和磁极化强度Js,因此,Dy元素添加能显著提高合金的内禀矫顽力Hcj,但会降低合金的剩磁Br。Dy元素替代Nd/Pr元素,增强了快淬薄带的热稳定性,提高了晶化退火温度。较高的晶化退火温度,使快淬薄带中已经形成的微晶更容易长大,形成一些粗大晶粒,降低了粘结磁体的磁性能。1.0%是较佳的Dy元素添加量,(Nd,Pr)9.5Dy1Fe83.5B6合金快淬粘结磁体的最大磁能积(BH)max为71.6 k J/m3,剩磁Br为0.638 T,内禀矫顽力Hcj为611 k A/m。     

Preparation and properties of alcohol-resistant thermal transfer printing inks for multifunctional label printing via physical blending of resins

Due to the rise of the logistics industry and the widespread use of ink labels, problems such as the narrow operating temperature range of ink, poor alcohol resistance, and insufficient scratch resistance need to be solved urgently. In this work, creates alcohol-resistant thermal transfer inks by mixing polypropylene chloride (VP-365) and epoxidized hydrogenated bisphenol A (P) resin and incorporating them into the ink formulation. The synthetic ink has a lower glass transition temperature (118.2°C), allowing the ink to print at lower temperatures. It has small wetting angles (68°, 63°, 58°, 46°, and 40°) and a large adhesion force (10.44 – 14.4 N) for different labels. Further, to evaluate the printing performance of the ink, the ink was scratched under 1000 g pressure and in the environment of isopropyl alcohol to evaluate its printing performance. The produced ink has high scratch resistance (300 times) and good alcohol resistance (140 times). Moreover, the developed ink showed good printability, printing media versatility, high adhesion, and excellent alcohol resistance. The synthesis method is facile and cost-effective, which paves a novel way towards high-performance ink printing and thermal transfer technology industries.     

Giant Stress—impedance Effect in Amorphous and Current Annealed Fe73.5Cu1Nb3Si13.5B9 Ribbons

The giant stress-impedance(GSl) effect in amorphous and current annealed Fe73.5Cu1Nb3Si13.5B9 ribbons has been investigated .The results showed that the GSl effect changed drastically with annealing techniques and the maximum stress impedance ratio of 350% was obtained after optimal conditions of current annealing .The behaviors of the stress impedance vary with densities of annealing current and the stress longitudinally applied during current annealing.The maximum change of stress impedance existed in the sample annealed by high-current-density electropulsing under applied stress of 100MPa.     

绕带式压力容器采用适应性随机搜索法的优化设计（Ⅰ）

本文提出了扁平绕带式压力容器以内筒最大漏检缺陷不扩展为适宜应力状态和合成状态下钢带等剪切应力缠绕的概念,并以此建立优化数学模型。结果表明:采用适应性随机搜索法计算容器绕层的内外半径和钢带缠绕参数,既能适当减薄壁厚,又能改善受力状态,达到经济安全的目的。     

软磁薄带巨磁阻抗效应的数值分析

利用磁畴壁移动模型以纳米晶软磁合金Ｆｅ７３．５Ｃｕ１Ｎｂ３Ｓｉ１３．５Ｂ９为例对软磁薄带中的巨磁阻抗效应进行了数值分析，结果发现不同的磁导率机制并不能显著发迹巨巨磁阻抗效的大小仅由磁导率对外加磁场的敏感性决定，从趋肤深度的角度讨论了巨磁阻抗效应的频率特性。     

Theoretical studies on a new single cristalline ribbon growth method

In order to obtain single crystalline ribbons from raw materials, we suggest a new method. From a narrow melted zone, formed along a generative line of a turning cylinder of polycrystalline material, a ribbon of material is continuously pulled in a direction perpendicular to the generative line and making a small angle with the horizontal plane. We have studied the application of the method to the silicon ribbon. We have studied the heat flux and temperatures profiles, pointing out relations between melted zone configuration, supplied power and rotation rate. The study of the melted zone hydrostatic equilibrium configurations and their influence on the ribbon growth characteristics and stability, improves on previous results for the melted zone central area and determines the shape of the floating zone lateral sides. The main advantages of the method for the production of silicon solar cells or in the space metallurgy field are discussed. Work supported by ‘Solar Energy Program’ (PIRDES) of the C.N.R.S.