共查询到18条相似文献,搜索用时 93 毫秒
1.
为了研究手部皮肤的生物、摩擦学特性和为护手产品的相关研究提供科学依据,采用微观摩擦试验机测定手背皮肤的摩擦因数,经过对24位健康志愿者的左右手手背皮肤表面的摩擦学特性试验,结果是:在受试者手背皮肤保持自然洁净的情况下,女性左、右手手背皮肤的摩擦因数平均值分别为0.49和0.48,而男性左、右手手背皮肤的摩擦因数平均值分别为0.38和0.39;在受试者手背涂抹护肤用甘油后,其皮肤的摩擦因数明显升高且均超过1,保持时间大约220min。研究结果表明:男性手背的摩擦因数比女性偏低;男、女手背不同位置处皮肤的摩擦因数相差不大;人体左、右手手背的摩擦因数无明显差别;甘油的润肤保湿效果显著。 相似文献
2.
皮肤-纺织品的摩擦特性试验研究 总被引:1,自引:0,他引:1
为了定量研究纺织品与人体皮肤之间的摩擦特性,采用微观摩擦试验机对4种织物与20位男女手臂前臂皮肤之间的摩擦因数进行测试。结果表明:皮肤-织物的平均摩擦因数在0.30~0.50之间,其中男性皮肤-织物的平均摩擦因数在0.30~0.36之间,女性皮肤-织物的平均摩擦因数在0.40~0.50之间。织物表面特征,如表面形状、纹理特点、组织结构、平整度、致密度和弹性等,以及纤维本身的表面特征,是织物表面摩擦特性存在差异的根本原因。4种织物的平均摩擦因数由高到低分别为全毛绒面呢、羊皮、真丝绸和本色平纹棉布,其中丝绸和平纹棉布的平均摩擦因数比较接近;在与不同纺织品摩擦时,女性皮肤-织物的平均摩擦因数普遍比男性高。 相似文献
3.
4.
通过四球机摩擦学试验的方法,探究高铁齿轮油的摩擦学特性。采用不同转速及载荷的组合条件,对2种高铁齿轮油在75℃恒温下进行1 h的摩擦试验。试验结果表明:转速与载荷的变化均对2种齿轮油的摩擦因数有影响;当定速变载时,磨斑大小随载荷增加呈现逐渐增大趋势;当定载变速时,磨斑大小随转速增加呈现先增大后减小的趋势,且载荷变化对磨斑大小的影响更为明显。通过对比2种油的试验结果可以发现,抗磨性好的油其摩擦因数波动也更平稳些,并且2种油都是在1 400 r/min、353 N的条件下取得磨斑最大值。 相似文献
5.
6.
7.
载荷对丁腈橡胶摩擦学特性的影响 总被引:7,自引:2,他引:7
采用栓-盘式摩擦磨损试验机考察了载荷对丁腈橡胶摩擦学特性的影响,分析了其作用机理,结果表明,丁腈橡胶的摩擦系数和磨损均随损均随载荷的增加而降低;在较低载荷时,丁腈橡胶表现为滞后摩擦,在较高载荷时,表现为粘着摩擦,在较低的滑动速度下,载荷的改变不会引起丁腈橡胶摩擦过程中摩擦化学反应的发生,只是产生简单的分子机械断裂。 相似文献
8.
9.
高分子材料的摩擦学特性及其应用 总被引:6,自引:0,他引:6
大多数高分子材料,特别是聚四氟乙烯,尼龙,聚甲醛,超高分子量聚乙烯等工程塑料,具有优良的减摩,耐磨,自润滑性能,可以用作轴承,导轨,齿轮,磨耗板等。本文阐述了高分子材料的磨擦学特性,并列举了一些应用。 相似文献
10.
11.
The goal of this work was to assess the suitability of a commercial synthetic skin to simulate occluded human skin friction behavior in dry and moist skin conditions and under different applied surface pressures, with the view to using this material as a tribological test bed for health care and personal care devices that are in direct contact with the skin during use. A flat rotating ring friction measurement device, in which one part of the skin surface is continuously covered (i.e., occluded), was used to compare the friction behavior of human skin and the synthetic skin in controlled nominally dry and nominally moist skin conditions. Three loading levels were tested, simulating light, medium, and high skin pressures typical of many lifestyle- and personal health–related applications. The results showed that the friction behavior of the synthetic skin tested was notably different to that of human skin in vivo in terms of the effects of skin hydration, sliding time, and applied surface pressure. It is concluded that, for use as a tribological test bed, the tested synthetic skin model does not provide an acceptable alternative to in vivo tests using human skin. 相似文献
12.
针织物与皮肤摩擦性能的测试方法 总被引:1,自引:0,他引:1
为了研究针织物与皮肤的摩擦性能测试条件,用织物与皮肤摩擦特性测试仪对5种不同规格的针织物和皮肤进行摩擦实验,对比平均动摩擦力、动摩擦力的平均差不匀率和变异系数3个指标的差异,根据摩擦曲线的稳定性和实际测试条件,推荐出常规针织物和皮肤的实验条件。实验发现,张力与动摩擦力呈正相关关系,与动摩擦力的平均差不匀率呈负相关关系,60cN的张力条件下平均动摩擦力的变异系数最小。摩擦速度与动摩擦力的关系不大,500mm/min的摩擦速度下,动摩擦力的变异系数及其差不匀率均最小。另外,以此测试条件在95%的置信概率水平下,每对针织物和皮肤配副进行4次摩擦实验即可满足测试需求。 相似文献
13.
14.
15.
Due to the high cost of hydroforming equipment, attempts have been made to model this process using bench testing. While tensile
and twist compression tests have yielded promising results, they do not simulate any single metal forming process. In this
study we investigated the use of expansion zone, guiding zone, and twist-compression tests to simulate hydroforming processes
and evaluated various overbased sulfonates and organic friction modifiers performance. The amorphous overbased magnesium sulfonate
improved the performance of the hydroforming oil in the expansion zone and provided no harm in the guiding zone, while the
crystalline overbased calcium sulfonate provided no harm in the expansion zone and improved performance in the guiding zone.
It was found that the friction modifiers tested display an antagonism, where, as the expansion zone performance increased,
the guiding zone performance decreased. Additionally, we found in twist-compression testing that the initial coefficient of
friction displayed a small correlation with the guiding zone test (from r = 0.26–0.47), while the failure time displayed a small correlation with the expansion zone test (r = 0.36–0.40). 相似文献
16.
17.
Understanding friction behavior of human skin is indispensable in order to optimize surfaces and materials in contact with the skin. The coefficient of friction (COF) for different materials contacting against the skin is mainly influenced by the nature of the materials, mechanical contact parameters, and physiological skin conditions. The aim of the present research work was to study the grip effect of two different polymeric materials by producing different textured patterns using a 3D printing microfabrication technique and a replication technique. It was found that under the same contact conditions, a difference in the friction amplitude exists between the two different polymeric materials and that positive texturing, which consists of high relief or protrusions, showed higher COFs than negative texturing, consisting of low relief, holes, or dimples, which showed a decrease in friction as the textured pattern area density increased. 相似文献