Introduction Many in vitro experimental set-up have been developed to mechanically stimulate cells. A recent review has classified the different mechanical devices in function of their loading modality [1]. None of the devices described could simulate micromotions arising at the bone/implant interface with amplitudes varying between 10 to 150 μm and at different pressure. These values of microm...

In this paper, we report on temperature-stable operation of multiple MEMS silica resonators on an ovenized fused silica device-layer. Temperature servo-control circuits are implemented for compensating the resonator frequency drift using an on-chip RTD-based temperature sensor. A wide linear range analog controller has been implemented to reduce the effective TCF of fused silica resonator by an...

Clark, Paul A., Anthony Rodriguez, D. Rick Sumner, Mohammad A. Hussain, and Jeremy J. Mao. Modulation of bone ingrowth of rabbit femur titanium implants by in vivo axial micromechanical loading. J Appl Physiol 98: 1922–1929, 2005. First published January 7, 2005; doi:10.1152/japplphysiol.01080.2004.—Titanium implants commonly used in orthopedics and dentistry integrate into host bone by a compl...

A micromechanical, laterally vibrating disk resonator, fabricated via a technology combining polysilicon surface-micromachining and metal electroplating to attain submicron lateral capacitive gaps, has been demonstrated at frequencies as high as 829 MHz and with Q’s as high as 23,000 at 193 MHz. Furthermore, the resonators have been demonstrated operating in the first three radial contour modes...

This paper describes recent results on the design and simulation of a flight control strategy for the Micromechanical Flying Insect (MFI), a 10-25mm (wingtip-to-wingtip) device capable of sustained autonomous flight. Biologically inspired by the real insect flight maneuver, the wing kinematics are paremetrized by a small set of parameters which are sufficient to generate desired average torques...

Computational models of muscle generally lump the material properties of connective tissue, muscle fibers, and muscle fascicles together into one constitutive relationship that assumes a transversely isotropic microstructure. These models do not take into account how variations in the microstructure of muscle affect its macroscopic material properties. The goal of this work was to develop micro...

The present work describes a multiscale methodology which has been developed for modeling of impact damage in the laminated composite structures. The methodology employs the High Fidelity Generalized Method of Cells (HFGMC) micromechanical model for the prediction of the local stress and strain fields, within the representative unit cell of the unidirectional composite material. The Mixed Mode ...

The presented work depicts results of a two-scale approach to the problem of damage and failure prediction on laminated composite structures. Modeling on the micro-level has enabled insight into the underlying physical processes which lead to homogenized properties of the macro-scale material. In this work, micromechanical analysis has been performed by application of the High Fidelity Generali...

The micromechanical silicon resonant accelerometer has attracted considerable attention in the research and development of high-precision MEMS accelerometers because of its output of quasi-digital signals, high sensitivity, high resolution, wide dynamic range, anti-interference capacity and good stability. Because of the mismatching thermal expansion coefficients of silicon and glass, the micro...

The present paper deals with a micromechanical model of interface able to couple the damage (micro-crack) evolution, the non-penetration conditions (Signorini equations) and the friction effect (Coulomb’s law). At a typical point of the interface, a Representative Volume Element (RVE) is considered; it is characterized by the presence of two different materials and by a microcrack evolving alon...