自修复混凝土梁弯曲试验的若干影响因素

以TY-6638型聚氨酯和氰凝为胶粘剂，以玻璃管为修复容器，进行了自修复混凝土梁的弯曲试验，并结合试验结果，从材料、修复容器的位置、试验加载和测量几方面分析了对试验效果的影响．     

利用环块磨损试验机模拟发动机实际工况实现摩擦增重的方法

分析了磨损试验难以模拟实际工况下的摩擦增重现象的根本原因，提出了使试验更贴近实际的指导方法，并以纳米铜粉作润滑油添加剂为例证明了此种方法的有效性，成功实现了试验条件下的摩擦增重，为试验室条件下研究自修复现象和规律提供了便利。     

渗透结晶型自修复剂及油井水泥浆体性能试验

通过对混凝土渗透结晶防水材料的研究,发现活性组分苹果酸(CA),并对CA改性合成了适用于油井水泥的水泥基微裂缝自修复剂CT.将CT直接添加到水泥浆中,通过与其他外加剂调配,能够满足油田固井水泥浆基本性能要求.抗压强度恢复率达92.8%,渗透率修复率达94.0%.SEM显示CT能在裂缝处生成枝蔓结晶,有效修复裂缝.最后通过XRD、孔结构分析了自修复剂CT的渗透结晶修复机理.     

高速场景网络覆盖断点自修复方法研究

为降低高速公路站点故障对网络质量的影响,本文提出一种高速公路站点故障后基于大数据的网络覆盖自修复的方法,依靠切换链识别技术、替补站点均衡筛选算法和应用黄金分割搜索算法的自动优化方法,实现替补站点的选择和自动优化,保障高速场景用户网络的良好感知。     

Tribological characteristics and self-repairing effect of hydroxy-magnesium silicate on various surface roughness friction pairs

Tribological characteristics and self-repairing effect of hydroxy-magnesium silicate (HMS) dispersed in lubricant oil on steel-to-steel friction pairs with various surface roughness were analyzed. The friction-reduction, anti-wear and self-repairing performance of various surface roughness friction pairs were examined by friction testing machine. An operation comparison was made between SJ10W-40 lubricant with and without HMS. The surface morphology and elementary composition of the grinding cracks were analyzed by scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). The results show that the lubrication state changes from boundary lubrication into mixed lubrication after operation in lubricant with HMS. The friction-reduction, anti-wear and self-repairing performance of the friction pairs with various surface roughness are distinctly different. There is a repairing film whose material is different from substrate material on the grinding cracks. In addition, Si, Mg, O, Al and other elements are deposited on the repairing film which contains nanocrystals of these elements. And HMS self-repairing material possesses superior performance of friction-reduction, anti-wear and self-repairing effects.     

The Pressure Loading Process among Stages of Magnetic Fluid Seal in Aqueous Environment

Abstract

Magnetic fluid (MF) seals have typically been used under various vacuum and gaseous low-pressure conditions. However, there are only a few cases in which MF seals can be used in a liquid environment. To promote this concept, a series of experimental tests was run in order to study the loading process among MF seals, as well as their self-repairing performance in aqueous environments. Exploring these factors has extended our knowledge of the sealing mechanisms in liquid environments. The results show that MF seals have enhanced self-repairing abilities in aqueous environments.     

Tribological and Repairing Properties of Combined Nanoparticle SiO2/ZnO

A type of additive-SiO2/ZnO combined nanoparticle were obtained by chemical method. The tribologica land repairing properties as lube additives have been studied by four-ball tester and ring-on-block tribotesters. The morphographies of the worn surfaces were analyzed by means of scanning electron microscopy(SEM). The results show that the additive possesses excellent extreme-pressure( EP), anti-wear(AW) , friction reducion and self-repairing properties. The lubrication and repairing mechanism is inferred that SiO2/ZnO combined nanoparticle is sedimented on the surface of steel, the lower surface film is formed under the high temperature and high pressure. The film possess excellent anti-wear , friction-reducing and repairing properties.     

AUV舵面故障的直接自修复控制

为了提高水下航行器（AUV）控制系统的可靠性,提出了基于模型跟随法的直接自修复控制方案,通过寻找故障发生后立即产生作用且与故障的具体信息无关的直接自修复控制规律,使故障AUV迅速恢复正常工作状态。该方案无需故障辨识就可以实现多个舵面故障的完全自修复,在AUV无故障时对其性能没有任何损失,并对扰动有良好的纠偏能力。上述特点和结论均得到了数学上的严格论证和仿真结果的有效支持。     

基于六官能度异氰酸酯用于自修复防腐涂料的微胶囊的制备与表征

微胶囊自修复技术是将自修复微胶囊埋植于基体,在破坏后实现自我修复。IPDI作为低官能度异氰酸酯在湿气中固化修复能力有限,本文设计基于六官能度异氰酸酯DiPE-IPDI/DiPE-TDI合成用于自修复防腐涂料的新型微胶囊,着重对六官能度异氰酸酯DiPE-IPDI合成过程中溶剂、温度进行反应条件优化,通过傅里叶红外光谱、核磁等对产物结构进行表征。同时对微胶囊制备过程中粒径结构进行可控组装, 通过TGA/DSC表征该自修复微胶囊热力学性能。制备负载微胶囊的自修复环氧树脂基防腐涂料,盐雾试验结果显示其具有优异的自修复性能。     

微纳米层状硅酸盐矿物润滑材料的摩擦学性能研究

对微纳米层状硅酸盐矿物粉的摩擦学性能进行了研究.将微纳米层状硅酸盐矿物质量比为0.5%分散在汽油机润滑油SJ10W/40中,利用摩擦磨损实验机考察其减摩抗磨及自修复性能,与润滑油SJ10W/40进行对比.采用扫描电子显微镜(SEM)分析试样磨痕表面的形貌和元素组成,并进行了EDS能谱分析.试验结果表明:与润滑油SJ10W/40相比,含层状硅酸盐矿物油样润滑的摩擦副,摩擦因数降低了71.6%.SEM分析表明磨痕处有着与基体材料不同的修复区域,该修复区域沉积着Si、Mg等元素.这些说明微纳米层状硅酸盐矿物润滑材料具有优良的减摩抗磨和自修复性能.