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ABS/硅油混合物摩擦性能研究 总被引:3,自引:0,他引:3
本文通过采用旋转回归设计,对影响ABS/硅油混合物摩擦性能的各种因素进行了比较深入的研究,通过摩擦性能对比,发现在体系中加入硅油确实使体系在摩擦性能上有较大幅度的提高,同时也考察了滑石粉对ABS/硅油共混物摩擦性能的影响,从而最后确定了制作轿车门立柱、门内基板等内饰件ABS/硅油混合物的配方。 相似文献
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石墨摩擦性能的研究现状及展望 总被引:1,自引:0,他引:1
在高温气冷堆中,球形燃料元件基体石墨的摩擦性能对于燃料循环系统的球流设计和反应堆运行安全具有十分重要的意义,已成为核材料学科的重要研究领域之一。文章介绍了迄今为止国内外石墨摩擦性能的研究进展,对石墨摩擦性能的主要影响因素如外在因素中的环境气氛和温度等进行总结,并对载荷、滑动距离和速度等影响因素进行了阐述。石墨摩擦性能的相关研究结果,可为未来开展高温气冷堆用球形燃料元件基体石墨摩擦性能的研究提供借鉴和参考。通过对比结构石墨IG-11和球形燃料元件A3-3基体石墨在空气中的摩擦行为,进一步说明了针对基体石墨摩擦行为开展研究的必要性。 相似文献
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对本实验室直接缩聚法制备的芳纶浆粕以及传统的纺丝切割法制备的Kevlar浆粕和Twaron浆粕取代石棉在酚醛树脂基摩擦材料中的摩擦性能进行了研究.结果表明,3种芳纶浆粕增强的摩擦材料都具有优良的摩擦磨损性能,特别是随着温度升高,摩擦系数有较大提高的同时,磨损率明显下降,克服了石棉增强的摩擦材料在较高温度下磨损率较大的缺点.直接缩聚法制备的PPTA浆粕增强的摩擦材料摩擦性能与Kevlar浆粕和Twaron浆粕增强的相近,为芳纶浆粕增强摩擦材料的国产化奠定了基础. 相似文献
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摩擦制动是交通车辆和机械设备等正常工作和安全运行的保障,因此,制动用摩擦材料的摩擦学性能研究已成为当今重要的研究课题。主要介绍了树脂基摩擦材料与摩擦配副的摩擦学机理,总结并分析了摩擦界面摩擦膜形成的影响规律和机理,讨论了摩擦界面的接触行为对摩擦膜的形成机理。在摩擦过程中,摩擦膜对摩擦材料的磨损和摩擦稳定性具有重要的作用,因此,摩擦膜的结构和性能是影响摩擦系统的安全和稳定的关键因素。由目前研究结果可知,后期应重点关注新型绿色树脂粘结剂和填料的研发、摩擦界面形成摩擦膜深度表征及摩擦材料结构的优化设计。 相似文献
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述了塑料材料摩擦、磨损的研究概况,详细阐述了摩擦因数、载荷、温度、速度、润滑、表面粗糙度pv值和热性能等因素对塑料材料摩擦性能的影响,介绍了磨损的衡量标准和测量方法. 相似文献
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《合成材料老化与应用》2017,(6)
作为车辆和机械离合器总成及制动器中的关键性安全部件,高性能刹车片摩擦材料的研究广泛受到各科研机构和主机厂的关注。本文介绍了刹车片摩擦材料的可压缩性、内剪切强度、热膨胀量等主要性能,同时从粘结剂、增强纤维、填料和摩擦性能调节剂等方面概述了主要影响刹车片摩擦材料性能的研究现状,并归纳了正交试验设计与模糊综合评价法、黄金分割法与灰色相关度分析、人工神经网络等摩擦材料配方设计及优化方法的应用情况,进一步探索了刹车片摩擦材料的未来发展趋势,指出摩擦材料各组分之间的耦合机理及对性能影响的研究是未来的热点,多种优化方法的融合将有利于新型刹车片摩擦材料的开发应用。 相似文献
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通过化学气相渗透法(CVI)制备出一种新型的"三明治"结构的C/C复合材料。其两侧是纯网胎结构的功能层,主要承担摩擦功能;中间为承担结构作用的结构层,与传统针刺毡结构一致。系统研究了材料的微观组织结构特征及其摩擦磨损性能。结果表明:"三明治"C/C复合材料各个区域的热解炭都为粗糙层结构;刹车性能较传统三维针刺结构C/C复合材料的摩擦性能稳定;在摩擦试验过程中,摩擦面能够形成一层连续均匀的薄膜,使材料在刹车过程中具有较稳定的摩擦系数并能够有效降低材料的磨损率。 相似文献
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复合固体推进剂含有固体颗粒较多,离散单元法是一种适合固体推进剂生产过程数值仿真的有效方法,颗粒物料的接触参数是保证离散单元法仿真精度的关键。本文以复合固体推进剂的主要组分铝粉和高氯酸铵固体颗粒为研究对象,通过实验测试获得了相关物料的安息角,利用专业离散元软件EDEM仿真模拟了安息角测试实验过程,建立了物料安息角与接触参数之间的联系。研究表明,滚动摩擦系数和滑动摩擦系数越大,安息角越大,物料流动性越差。对比仿真与实验结果,通过逆向反推法确定了物料的滑动摩擦系数和滚动摩擦系数两个关键接触参数。铝粉与高氯酸铵1∶2混合颗粒的滑动摩擦系数为0.2,滚动摩擦系数为0.05。为固体推进剂加工生产过程离散元数值仿真提供了关键基础数据。 相似文献
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Mohamed Ismail NallaMohamed Suthandathan Paramashivan Sivapirakasam Mahadevan Surianarayanan 《Propellants, Explosives, Pyrotechnics》2013,38(2):266-272
Fire and explosions in the processing of matchhead compositions are reported due to the friction sensitivity of materials used. This investigation is aimed at investigating the influence of different types of contact materials and their surface roughness on the friction sensitivity of a matchhead composition. The friction sensitivity of the matchhead composition was found to be dependent on the contact materials and their roughness. The results demonstrated that the contact materials and their surface roughness imparted variations to the sensitivity, ranging from 108 to 360 N. The sensitivity response of the energetic mixture was quicker in case of aluminum plate‐aluminum pin combinations than those when steel plate‐steel pin and brass plate‐brass pin combinations were used. For the first time, the experimental investigation identified a new value based on the material’s surface roughnesses called critical surface roughness, at which the matchhead composition ignited at a minimum frictional load. The matchhead composition was found to be highly hazardous at the critical surface roughness values of 1.09, 1.01, and 1.05 μm for aluminum, brass, and steel surfaces, respectively. Based on the experimental results this paper also discusses mechanism of ignition caused by the frictional load. 相似文献
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依据分形理论,研究了机械密封摩擦副端面间的真实接触状况,建立了机械密封摩擦副端面接触分形模型。得到了机械密封摩擦副端面微接触点的面积分布、临界弹性变形微接触面积、临界塑性变形微接触面积、量纲1真实接触面积的数学表达式。采用数值计算方法得到了GY70型机械密封摩擦副端面间的量纲1真实接触面积与端面比载荷的关系曲线。结果表明,真实接触面积随着密封端面比载荷的增加而近似呈线性增加;在相同比载荷下,真实接触面积随着特征尺度系数的增大而减小,随着分形维数的增大而增大,但当D达到167以后,随着D的增大而减小。机械密封摩擦副端面接触分形模型的建立,为研究机械密封摩擦副端面间的摩擦磨损性能和密封性能提供了依据。 相似文献
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针对WSM–3型酚醛树脂基无石棉摩阻材料,搭建实验装置研究WSM–3型闸瓦材料与16Mn钢摩擦副摩擦性能。根据实验数据,研究了瞬态/平均摩擦系数随不同接触压力、不同滑动速度及不同接触表面温度的变化规律,在考察多种曲线的基础上,分析瞬态/平均摩擦系数在不同工况参数下的变化特性,并探讨了闸瓦材料摩擦性能的变化机制。实验证实,闸瓦材料的摩擦性能不仅具有强烈的系统依赖性,而且与系统的工况因素具有强耦合性,在闸瓦材料摩擦学设计中将瞬态/平均摩擦系数视作变量是必要的。 相似文献
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This work proposed the design and fabrication method for T-shaped dry adhesives based on stretchable ethylene-vinyl acetate (EVA) copolymer, with strong normal adhesion strength up to 70 N cm−2. As fabricated adhesives based on the inexpensive soft replication process have comprehensive advantages including easy demolding applicable for various curable materials; self-cleaning characteristic based on excellent nonwetting characteristics to both water and oil; reversible adhere/detach cycling for reusability. The flexible and transparent EVA dry adhesive films were readily fabricated to be novel dry-adhesive coatings decorated on various substrates and shapes. We also explored the adhere and detach mechanism for the significantly enhanced adhesion of T-shaped EVA microstructures, which indicated the increased contact area and the friction dissipation between the undercut and the substrate contribute to the adhesion enhancement, while the excellent elastic deformation of EVA may play an important role for adhesion enhance during the pulling-off process. These results showed the great potential of high-performance T-shaped EVA-based polymer dry adhesives for practical applications. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47296. 相似文献
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In this article, the effects of the operating conditions, i.e., load, oscillation speed, temperature, and contact modes on the friction behavior of polyethylene were studied through the SRV vibration friction test machine, the MHK-500 friction and wear test machine, as well as an on-line temperature testing device. The experimental results showed that the friction coefficient μ of polyethylene increases with increase of the oscillation frequency and amplitude, the speed, and PV value, while load has a quite complex impact on μ; suitable choice of load could reduce μ and smoothen the friction process. Contact modes of friction pairs have considerable effects on μ, because all the real contact area of the friction assembly, the pressure, the indentation of surface asperities, as well as the temperature rise and distribution in the contact region are related to contact modes. Temperature is a key factor determining the viscoelastic properties of polyethylene, and therefore has great effect on μ. On-line temperature testing offers a way to reveal the relations between temperature and the friction behavior of polyethylene. All the results obtained provide the basic data for establishing mathematical models and computational simulation methods to describe and study the tribological behavior of some polymer materials. © 1995 John Wiley & Sons, Inc. 相似文献