摘要
作者从含橡胶的摩阻材料的摩擦状况出发,对其摩擦机理提出了一个新的观点——气穴排空说,並进行了简单的实验论证。认为弹性材料在与刚性对偶在负荷下接触时,由于材料的弹性变形使接触面间空隙中的气体被排出或部分排出而形成真空状态,因此弹性体上除了受外加负荷之外,还增加了部分大气压力,因而摩擦力也随之增大。摩擦力增大的部分为: △F=f·△P 式中f为材料间的摩擦系数,△P为正压力增大部分,其值可表示为: ΔP=A_(app)·P_(ntm)· 此处A_(app)为表现接触面积;P_(ntm)为大气压强;η为排空率(％)。η受材料弹性模量,负荷及对偶表面状态等的影响。
The author has suggested a new view about the rubbing mechanism of the frictional materials containing rubber on the basis of their friction state and some experiment proofs. The main points of the theory of air exhaustion in the caves are as follows;When an elastic material contacts with a rigid material under the load, the elastic deformation of materials presses the gas out of the caves space between contact surfaces or partly out. The elastic material, therefore, is not only pressed by the applied load, but also by the outside atmosphere, and the friction force is increased with the extra pressure. The increased part of the friction force ( AF ) can be formulated-f is the friction coefficient and AP is the increased part of the vertical pressure, it is formulated;Aapp is the apparent contacted aresj Patm is the pressure of atoms-phere and η is gas exhaustion rate, it depends on the modulus of elasticity of material, applied load and the condition of contact surf aces,etc..
出处
《固体润滑》
CSCD
北大核心
1989年第2期95-99,共5页
