The Incremental Shear Modulus in an Incompressible Elastic Material

1997 ◽  
pp. 767-771
Author(s):  
K. N. Sawyers ◽  
R. S. Rivlin
1978 ◽  
Vol 87 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Hüsnü Tözeren ◽  
Richard Skalak

The steady flow of a suspension of closely fitting, neutrally buoyant, incompressible and elastic spheres through a circular cylindrical tube is investigated under the assumption that lubrication theory is valid in the fluid region. A series solution giving the displacement field of an elastic incompressible sphere under axisymmetrically distributed surface tractions is developed. It is found that, for closely fitting particles, flow properties of the suspension are strongly dependent on the shear modulus of the elastic material and the velocity of the particle.


Meccanica ◽  
1978 ◽  
Vol 13 (4) ◽  
pp. 225-229 ◽  
Author(s):  
K. N. Sawyers ◽  
R. S. Rivlin

An optical elastohydrodynamic rig was constructed to measure the inwards radial force of a ball rolling on a plate. The axis of rotation of the ball could be set to give known amounts of side slip and spin. Hertz pressures up to 2 GPa could be achieved. Four fluids were used, a tractant, 5-phenyl 4 ether, a paraffinic cylinder stock and a highly refined synthetic hydro­carbon. It is shown that the film changes from a viscous to an elastic material the shear modulus and ultimate shear strength of which rise mostly linearly with pressure. Their ratio approaches 1/(2 π ) (as predicted by Frenkel’s theory (1926).


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