论文标题
超越质量和数量：接触分配编码摩擦强度
Beyond Quality and Quantity: Contact Distribution Encodes Frictional Strength
论文作者
论文摘要
从经典上讲，两个物体之间的接触面积$ a_r $的数量被认为是摩擦力的代理。但是，整个界面之间的键密度 - 接触质量 - 也是相关的，当代辩论通常围绕这两个因素的相对重要性。在这项工作中，我们证明了第三个因素通常被忽视，它在静态摩擦强度中起着重要作用：接触的分布。在成像接触平面时，我们在三对实心块上执行静态摩擦测量值，$μ$。通过在数百张$μ$对上使用线性回归，我们能够预测未来的摩擦测量值，其准确度比现有基准测量（包括总触点面积总数）高3至7倍。我们的模型无法获得接触质量，因此我们得出结论，界面状态的很大一部分是在接触的空间分布中编码的，而不是其质量或数量。
Classically, the quantity of contact area $A_R$ between two bodies is considered a proxy for the force of friction. However, bond density across the interface - quality of contact - is also relevant, and contemporary debate often centers around the relative importance of these two factors. In this work, we demonstrate that a third factor, often overlooked, plays a significant role in static frictional strength: the distribution of contact. We perform static friction measurements, $μ$, on three pairs of solid blocks while imaging the contact plane. By using linear regression on hundreds of image-$μ$ pairs, we are able to predict future friction measurements with 3 to 7 times better accuracy than existing benchmarks, including total quantity of contact area. Our model has no access to quality of contact, and we therefore conclude that a large portion of the interfacial state is encoded in the spatial distribution of contact, rather than its quality or quantity.
