Sliding resistance

Weihs, T.P. and Nix, W. (1991), Experimental examination of the push-down technique for measuring the sliding resistance of SiC fibers in a ceramic matrix. J. Am. Ceram. Soc. 74, 524-534. 

Marshall, D.B., Shaw, M.C. and Morris, W.L. (1992). measurement of interfacial debonding and sliding resistance in fiber reinforced inlermelallics. Acta Metall. Mater. 40, 443-454. 

Zhou, L.M. and Mai. Y.W. (1992). A three-cylinder model for evaluation of sliding resistance in fiber pusb-out test, in Ceramics Adding the Value (M.J. Bannister, ed.), CSIRO Pub, Melbourne, pp. 1113-1118. 

The balanced bridge circuit (Figure 10) uses a galvanometer to compare the RTD resistance with that of a fixed resistor. The galvanometer uses a pointer that deflects on either side of zero when the resistance of the arms is not equal. The resistance of the slide wire is adjusted until the galvanometer indicates zero. The value of the slide resistance is then used to determine the temperature of the system being monitored. 

Three underlying mechanisms are responsible for the nonlinearity.17,18 (1) Frictional dissipation occurs at the fiber/matrix interfaces, whereupon the sliding resistance of debonded interfaces, r, becomes a key parameter. Control of t is critical. This behavior is dominated by the fiber coating, as well as the fiber morphology.19,20 By varying r, the prevalent damage mechanism and the resultant non-linearity can be dramatically modified. (2) The matrix cracks... 

Determination of the sliding resistance of woven fabrics to displacement, for example DIN 53934... 

Owing to shear stresses induced in the foundation soils by the vertical eccentric foxm-dation load, the magnitude of horizontal load that the foundation soils can sustain may decrease witii an increase in vertical load. This fact must be recognized when computing and evaluating sliding resistance by the simplified procedures described below. 

Coefficient of Friction. Primary Film Test Method ASTM D1894. The coefficient of friction (CoF) test is used to measure the static (starting) and kinetic (sliding) resistance of the film when sliding over another surface, either film-to-film or film-to-metal. Coefficient of fiiction is the ratio of the fiictional force to the force, usually gravitational, acting perpendicular to the two surfaces in contact. The static CoF is representative of the force required to begin movement of the surfaces relative to each other. (See Fig. 3.) The kinetic CoF is representative of the force required to sustain this movement. ]... 

The specific wear rate for liquid crystal polymers, 30% glass fibre reinforced PA 4,6 and 30% glass fibre reinforced PPS increased with the increase in sliding resistance. 

FIGURE 11.3.4 Sliding resistance durability number of fishing strings for four kinds of ceramics. 

Silt Density Water content Water permeability Shear strength or sliding resistance Plasticity Lime content Organic content... 

Clay Density Water content Sliding resistance Consistency ranges (plasticity) Organic content... 

Retaining wall Bearing capacity Sliding resistance Earth resistance ... 

The sliding resistance of a spread footing should be evaluated independently of the bearing capacity, wherein, the unit adhesion and/or frictional resistance of the footing s base to sliding are multiplied by the area of the base to obtain the sliding resistance. 

For the evaluation of the sliding resistance, the transfer of the total lateral shear force between the tank and the subgrade shall be considered. For self-anchored (unanchored) flat-bottom steel tanks, the overall horizontal seismic shear force shall be resisted by the friction between the tank bottom and the fotmdation or subgrade. Self-anchored storage tanks shall be proportioned such that the seismic base shear, Q, does not exceed a limit value Qs, defined as follows ... 

In the case of Fig. 15.6, sliding resistance along a reinforcing element results from shear stress at the interface between the soil and the geotextile, which is given by (Eq. [15.15]) ... 

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