Numerical simulation models for capacitive, micromechanical inertial sensors are presented. These dynamic, nonlinear models include the contributions of electrical, mechanical, and fluidic energy domains by means of electrical equivalent circuits consisting of lumped, frequency-independent components. The mechanical resonance modes, gap capacitances, gas film damping forces and the electrostati...

Micromechanical models are developed to predict the time and temperature dependent response of woven composite substrates used in multilayer printed circuit boards. In the first part of this study, the elastic–viscoelastic correspondence principle is applied to previously reported elastic micromechanical models. The time-dependent creep compliance of a particular composite substrate (7628 style...

abstract: Concrete in its macrostructure is a multiphase cementitious composite material, however, by reducing scale, it possible to identify the phases that compose it, among are those embedded microscale: hydrated silicates, mesoscale: cement paste, transition zones and aggregates macro phase: itself. Modeling this type of material with two-phase micromechanical models common literature, but ...

Biomimetic Sensor Modeling and Simulations for Flight Control of a Micromechanical Flying Insect

This study focused on the contribution of micromechanical parameters on the macro-mechanical response of short fiber composites, namely polypropylene matrix reinforced by glass fibers. In the framework of this paper, an attention has been given to the glass fibers length, as micromechanical parameter influences the overall macroscopic material’s behavior. Three dimensional numerical models were...

Micromechanical models for fracture initiation that incorporate local failure criteria have been widely developed for metallic and ceramic materials; however, few such micromechanical models have been developed for the fracture of bone. In fact, although the fracture event in "hard" mineralized tissues such as bone is commonly believed to be locally strain-controlled, only recently has there be...

A 2 DOF resonant thorax structure has been designed and fabricated for the MFI project. Miniature piezoelectric PZN-PT unimorph actuators were fabricated and used to drive a four-bar transmission mechanism. The current thorax design utilizes two actuated four-bars and a spherical joint to drive a rigid wing. Rotationally compliant flexure joints have been tested with lifetimes over 10 cycles. W...