ABSTRACT This paper reports on an investigation into slanted support, an increasingly common method of displaying tapestries in mainland Europe. Two factors contribute to the efficacy of slanted supports for tapestry: the angle of display and the degree of friction between the tapestry and the support. Initial analysis demonstrated that a small degree of slope, of 5°, has only marginal impact on reducing the load experienced by the tapestry. Experiments were carried out to compare the friction between small tapestry fragments and a range of fabrics commonly used to cover slanted supports. Lined and unlined tapestry fragments were placed on a fabric-covered board and tilted from horizontal to vertical. In most cases it was found that the board could be tilted beyond vertical before the tapestry began to slip; this meant it was not possible to calculate a coefficient of friction. It was clear that the simple Coulomb model of friction does not apply in this situation and that adhesive forces are even more significant than friction. Loading the tapestry samples demonstrated that the coefficient is dependent on load, confirming this observation. The paper also reports on the use of digital image correlation (DIC) to calculate strain data. A tapestry fragment was suspended on a vertical board half covered in cotton molton fabric. The strain values were very low on the half of the tapestry against the molton; they were higher on the half against the uncovered board. It was also apparent that the tapestry with board-covering fabric was less subject to expansion and contraction caused by fluctuating relative humidity. The research concluded that the friction/adhesion forces are so effective that a tapestry is well supported on a vertical fabric-covered board; there is no additional benefit in providing a small degree of slant.

中文翻译：

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了解摩擦力和附着力在倾斜支撑上的挂毯展示中的作用

摘要 本文报告了对倾斜支撑的调查，这是一种在欧洲大陆展示挂毯的越来越普遍的方法。有两个因素有助于挂毯倾斜支撑的功效：展示角度和挂毯与支撑之间的摩擦程度。初步分析表明，5° 的小坡度对减少挂毯所承受的负载只有很小的影响。进行了实验以比较小挂毯碎片和一系列通常用于覆盖倾斜支撑的织物之间的摩擦。有衬里和无衬里的挂毯碎片被放置在一块织物覆盖的板上，并从水平倾斜到垂直。在大多数情况下，人们发现在挂毯开始滑动之前，木板可能会倾斜到超出垂直水平。这意味着无法计算摩擦系数。很明显，简单的库仑摩擦模型不适用于这种情况，粘附力甚至比摩擦力更重要。加载挂毯样本表明系数取决于负载，证实了这一观察结果。该论文还报告了使用数字图像相关 (DIC) 计算应变数据。一块挂毯碎片悬挂在一块用棉质织物覆盖的垂直板上。挂毯对着莫尔顿的一半的应变值非常低；他们在半场对抗未覆盖的棋盘时更高。同样明显的是，带有覆板织物的挂毯较少受相对湿度波动引起的膨胀和收缩的影响。研究得出的结论是，摩擦力/粘附力非常有效，以至于挂毯可以很好地支撑在垂直的织物覆盖板上；提供小程度的倾斜没有额外的好处。