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Shear, cyclic energy

In these cases the relative velocity of the shearing plates is not constant but varies in a sinusoidal manner so that the shear strain and the rate of shear strain are both cyclic, and the shear stress is also sinusoidal. For non-Newtonian fluids, the stress is out of phase with the rate of strain. In this situation a measured complex viscosity (rf) contains both the shear viscosity, or dynamic viscosity (t] ), related to the ordinary steady-state viscosity that measures the rate of energy dissipation, and an elastic component (the imaginary viscosity ij" that measures an elasticity or stored energy) ... [Pg.631]

The property of a coating which determines how much cyclic shear energy will be transmitted across the coating-substrate interface is the velocity of propagation in the two media. Now G , which depends on the square of velocity, must be replaced by the shear mechanical impedance Z, where... [Pg.175]

Oscillation Test. During an oscillation test, a cyclic shear strain is applied to the sample and resulting shear rate response and time lag of response are measured. From these measurements, viscons and elastic properties of the material can be separated. The elastic modulus G measures the amount of energy stored, whereas the loss modulns G" measures the energy loss dne to viscous dissipation. Figure 8.83 is an illustration of G, G", and r] as a function of freqnency for a Ag paste. The viscoelastic properties of materials are further... [Pg.659]

The physical significance of the quantities just defined can best be appreciated by considering what happens to the energy applied to a sample undergoing cyclic deformation. From Equation 13.3, the work done on a unit volume of material undergoing a pure shear deformation is... [Pg.300]

Applied Technology Council (1992) Guidelines for cyclic seismic testing of components of steel structures ATC-24. Applied Technology Council, Redwood City Benavent Climent A, Oh S, Akiyama H (1998) Ultimate energy absorption capacity of slit-type steel plates subjected to shear deformations. J Struct Constr Eng 503 139 147... [Pg.568]

See other pages where Shear, cyclic energy is mentioned: [Pg.274]    [Pg.232]    [Pg.343]    [Pg.221]    [Pg.420]    [Pg.206]    [Pg.113]    [Pg.200]    [Pg.187]    [Pg.329]    [Pg.29]    [Pg.114]    [Pg.186]    [Pg.193]    [Pg.603]    [Pg.6]    [Pg.269]    [Pg.424]    [Pg.378]    [Pg.844]    [Pg.1207]    [Pg.3090]    [Pg.67]    [Pg.354]    [Pg.2]    [Pg.124]    [Pg.206]    [Pg.30]    [Pg.100]    [Pg.506]    [Pg.346]    [Pg.618]    [Pg.3269]    [Pg.3273]    [Pg.3291]    [Pg.3424]    [Pg.459]    [Pg.383]    [Pg.75]   
See also in sourсe #XX -- [ Pg.175 ]



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