Strain fields on cell stressing devices employing clamped circular elastic diaphragms as substrates.

Solutions are presented for the surface strain fields on inflated elastomeric circular diaphragms used for in vitro cell stressing experiments. It is shown, by using the method developed by Way (1934) to solve the nonlinear von Karman plate equations, that the surface strains due to bending are not negligible and that large negative radial strains arise near the clamped edge for center deflection-to-thickness ratios (w/h) less than 10. The method of Hart-Smith and Crisp (1967) was used for w/h greater than 10 to solve the nonlinear equations for symmetrical deformation of axially symmetrical rubber-like membranes.

Femoral strain adaptation after total hip replacement: a comparison of cemented and porous ingrowth components in canines.

The purpose of this study was to investigate if experimental strain analysis is predictive of femoral adaptation after total hip replacement (THR). Ten large adult dogs underwent unilateral THR with identical implants. Five implants were press fit for porous ingrowth fixation, and five were cemented.

Resistance of cerclage to knot failure.

The comparative ability of loop-knotted and twist-knotted cerclage to withstand tensile forces was tested. Two twist-knot devices and one loop-knot device were used to apply cerclage wires to a 5-cm diameter split circular jaw mounted on a tensile testing machine. Twist-knot devices were tested with 0.