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Background Whether all-polyethylene tibial (APT) components are beneficial to patients who received distal femur limb-salvage surgery lacks high-quality clinical follow-up and mechanical evidence. This study aimed to investigate the biomechanics of the distal femur reconstructed with APT tumor knee prostheses using finite element (FE) analysis based on our previous, promising clinical outcome. Methods...
The fused deposition modeling (FDM) is one of the most attractive 3D printing product manufacturing processes. FDM fabricates prototypes by extruding a semi-molten polymer filament through a heated nozzle in a prescribed pattern onto a platform. As the material is deposited, it cools, solidifies, and bonds with the surrounding materials. The temperature distribution among polymer filaments in the...
This paper presents a pneumatic rubber microactuator which can be used in many fields such as the miniature endoscope inspection, the pipe inspection etc.. The actuating performance was analyzed using ANSYS. The results showed that the maximum stress was not on the position where the dimension mutated. And the end surface rotation angle was increasing linearly while the applied pressure was augmented...
The piezoelectric actuator is a well-known driving component for managing small displacements. This paper proposes a new type of novel arching piezoelectric actuator (APA) which demonstrates excellent displacement and force capabilities in response to input voltages and can be used in the precise positioning and structure shape control fields. The matrix of this kind of actuator is an arched aluminum...
This paper presents an investigation of dynamic behaviors of free torsion vibrations of lead-screw feed drives using the finite element method (FEM) under consideration of changeable table position and work-piece mass, to which the effect of changing table position and work-piece mass on the first three modes of the free vibration is numerically analyzed. The results indicate that all the nature frequencies...
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