Fundamentals of Anti-shudder Durability: Part I - Clutch Plate Study

Occurrence limit of stick‐slip: dimensionless analysis for fundamental design of robust‐stable systems

“…This means that the condition of Δμ k > 0 is insuffi cient to prevent stick-slip perfectly, although it has been used as a criterion for developing some sliding systems. [1][2][3][4][5][6] Third, for Δγ < 0, the occurrence limit for a small λ is a straight line with a slope of unity, and seems to increase asymptotically to ζ = 1 as is the case for Δγ = 0. However, only for Δγ < 0, another straight line with a slope of unity appears for a large λ; this corresponds to the stability limit of the equilibrium point shown in Figure 9.…”

“…[1][2][3][4][5][6] Furthermore, the squeal in brake systems, 7-10 intermittent motion of windshield wipers [11][12][13] and abrasion patterns appearing on tire surfaces [14][15][16] are also matters relating to stick-slip in sliding systems. Studies for individual systems are necessary when developing these systems.…”

Surface chemical characterization of steel clutch plate in ATF

“…As the oil film thickness decreases to the order of lining roughness, asperity contacts start to support the applied load. When the asperity contacts support all the applied load, the hydrodynamic pressure of ATF oil film at the interface is equal to zero and its effective thickness reaches a steady value [1], and the friction between the paper and steel discs is boundary friction [1][2][3]. The most complete analytical studies is the models for predicting the torque response during the engagement of wet clutches by Berger et al [4], and Natsumeda and Miyoshi [5].…”

Influence of Adhesive Wear and Thermal Degradation on the Frictional Characteristics of Paper-Based Friction Materials: A Comparative Study

“…In practice, both degradation sources inevitably occur simultaneously, leading to a well-known phenomenon which is called glazing [13]. As a result of this phenomenon, the surface of the friction material looses its porosity (i.e., the surface porosity decreases due to blocking of deposition of debris particles), becomes smoother, and appears glazed [19]. Many intensive studies have been carried out to characterize the frictional characteristics of paper-based friction material due to the degradation [12,[19][20][21][22].…”

“…As a result of this phenomenon, the surface of the friction material looses its porosity (i.e., the surface porosity decreases due to blocking of deposition of debris particles), becomes smoother, and appears glazed [19]. Many intensive studies have been carried out to characterize the frictional characteristics of paper-based friction material due to the degradation [12,[19][20][21][22]. However, the respective in�uences of adhesive wear and thermal degradation occurring in the material on the frictional characteristics during its lifetime still remain unclear and are subject to further investigation.…”