Vibration Characteristics of Magnetostrictive Composite Cantilever Resonator with Nonlocal Effect.

Taking the nonlocal effect into account, the vibration governing differential equation and boundary conditions of a magnetostrictive composite cantilever resonator were established based on the Euler magnetoelastic beam theory. The frequency equation and vibration mode function of the composite cantilever were obtained by means of the separation of variables method and the analytic solution of ordinary differential equations. The lateral deflection, vibration governing equations, and boundary conditions were nondimensionalized.

Investigation on large elastoplastic deformation in expansion and springback for a composited bioresorbable stent.

Mechanical performances for a composited bioresorbable stent were investigated by using the finite element method, which concerns the elastoplastic large deformation of expansion and springback during stent implantation. The introduced stent is composited by the outer layer of poly-L-lactic acid (PLLA) and the core of magnesium alloy (Mg alloy). As comparisons, meanwhile two single-material stents of PLLA and Mg alloy with the same geometric structures as the composited stent were considered.