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得益于马丁橡胶公司对纳米材料的开发工作,阻尼特性现在可以根据应用量身定制

得益于马丁橡胶公司对纳米材料的开发工作,阻尼特性现在可以根据应用量身定制

Through the use of functionalised nanomaterials, 马丁橡胶可以使工程师在任何给定的应用中定制橡胶化合物的动态特性,以获得最佳性能.

 

What is damping?

Damping is the reduction of the amplitude of a wave, created by mechanical force, 通过将波转化为热能的过程. 换句话说,它是减少(或在某些情况下,消除)振动或噪声(见. Fig 1).

Why is damping important?

Vibration and noise can have a negative impact on equipment and therefore individuals in an industrial (or domestic) setting; by using damping on loud or vibrating equipment, 它可以提高设备的寿命和效率, reduce dangers caused by noise and movement, 也改善了一个人的工作环境的人机工程学.

Fig. 1尽管频率是连续的,但由于阻尼作用,振幅随着时间的推移而减小.

你应该在阻尼材料中寻找什么样的特性?

阻尼材料的性能不仅取决于它所使用的环境, 作用在它上面的力和要被阻尼的能量类型, but also the characteristics of the material selected.

工程设置中使用的阻尼解决方案可能需要高阻尼系数, 这意味着与其将能量返回系统, 不需要的振动将被材料“吸收”,并减少任何响应. 为了比较不同材料在动载荷条件下使用的适用性, 阻尼系数用于使工程师了解材料的这种特殊性质,并对其是否适合某种应用作出判断.

能量耗散可以从这两种离散的影响来看, or continuous vibration; a mismatch in the storage vs loss modulus (elastic vs. viscous response [see Fig. 2])可以减少通过所选阻尼材料传递的振动,因为大部分振动被转换成其他形式的能量, such as heat. Rubber is a visco-elastic material, and when considering the optimum material for damping, 弹性和粘性响应的平衡是至关重要的. Tan delta is a ratio of the loss to the storage modulus, 并给出了橡胶的阻尼特性, i.e. the energy dissipated by the material.

Fig. 2 Elastic response vs. viscous response

Why is rubber a good material for damping?

橡胶一旦硫化,分子结构就很复杂, and the cross-linking that takes place, usually either through sulphur or carbon, gives the molecular network strength, elasticity and other mechanical properties. 该材料还将与影响最终产品性能的填料复合, particularly in terms of the dynamic response.

Which rubber should I choose?

由于天然橡胶的使用寿命长,在要求较低的应用中,它是标准的“首选”材料, 适应性:对各种温度的适应性和抵抗力. However, 产品是用于高温应用还是与碳氢化合物一起使用, the most likely candidate would be an acrylic elastomer; either polyacrylate (ACM) or ethylene-acrylate (AEM) such as Vamac®. 这些材料被评为耐碳氢化合物, but their resistance is not as high as that offered by some grades of hydrogenated nitrile (HNBR); AEM can achieve a similar resistance, 但是可能需要一个专家级别(因此成本很高).

通过使用新型纳米材料来调整HNBR的性能, 十大网赌靠谱网址平台可以在保持基础弹性体固有性能的同时,改善其阻尼特性. 在役部件的性能是一幅高度复杂的画面, 耐各种因素,包括温度, chemical and mechanical effects. 通过限制材料暴露在这些因素下的变化, 十大网赌靠谱网址平台可以在所有场景中建模和维护性能.

马丁橡胶如何改善弹性体的动态性能?

Working with Haydale, Martin’s Rubber has developed an enhanced compound; by replacing some of the existing filler system with Haydale’s HDPlas™ carbon nanotubes, we are able to reduce the weight of the final product, increase the elongation to break, tensile modulus, and load deflection characteristics, as well as improving the tear resistance. 具体到阻尼,tan delta是增加使用更换填充系统.

What does this mean?

将纳米材料与橡胶结合使用的这一进展,将使工程师们能够选择和定制一种既能与油和高臭氧环境一起工作,又能将其与优异的阻尼性能结合在一起的材料, 在设计成品部件和为应用选择最合适的材料方面,允许更多的选择.

The uplift in other physical properties, as a result of the introduction of nanomaterials, 意味着现在部件的尺寸可能比以前为应用程序设计的更小, or will be able to dissipate more force, providing potential cost- and weight-savings.

 

马丁橡胶公司使用了全系列的热固性弹性体, from natural through to fluorocarbon rubber, 为客户的应用提供最好的材料. We are also dedicated to developing new technologies, and utilising emerging technologies, to increase the options available, for optimum performance in application.

 For further information please see our materials development page,或致电023 8022 6330与十大网赌靠谱网址平台的技术团队联系,或发送电子邮件: [email protected]

 

由于Martin 's Rubber公司首次对纳米材料进行了开发,现在可以根据应用量身定制后阻尼特性 Martin’s Rubber Company.

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