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Special Issue "Advances in Micromechanics and Microengineering"

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A special issue of Micromachines (ISSN 2072-666X).

Deadline for manuscript submissions: closed (15 January 2011)

Special Issue Editors

Guest Editor
Prof. Dr. Craig R. Friedrich (Website)

Department of Mechanical Engineering - Engineering Mechanics, 815 RL Smith, Michigan Technological University, Hougjhton, MI 49931, USA
Fax: +1 906 487 2822
Interests: micromechanical machining; precision machining; micromechanical processes; microsystems; bioinspired sensing; bio-nano-hybrid materials; nanofabrication
Guest Editor
Prof. Dr. Igor Tsukrov (Website)

Department of Mechanical Engineering, University of New Hampshire, Durham, NH 03824, USA
Phone: +1-603-862-2086
Fax: +1 603 862 1865
Interests: micromechanics and fracture of composite materials; computational solid mechanics; finite element method; ocean engineering

Special Issue Information

Dear Colleagues,

As machines continue to be made smaller, there is the requirement for better understanding and control of the materials from which the micromachines are fabricated and the mechanics by which those materials perform. In addition, the engineering of these machines must account for many factors not normally considered in the macro world including size scaling effects on the structural and dynamic characteristics, nonhomogenity and anisotropy of the constituent materials, thermal issues where surface effects can become dominant over bulk effects, the ability to power and control micromachines, and the fundamental and applied mechanics which are basic to the successful evolution of micromachine designs. The special issue on Advances in Micromechanics and Microengineering is expected to bring the latest research results in microscale mechanics and engineering related to the realization of micromachines in the broadest sense.

Prof. Dr. Craig R. Friedrich
Prof. Dr. Igor Tsukrov
Guest Editors

Keywords

  • micromechanics
  • micromachines
  • micromachining
  • microdynamics
  • micromaterial
  • scaling effects
  • microthermal
  • precision control

Published Papers (2 papers)

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Research

Open AccessArticle Mori-Tanaka Based Estimates of Effective Thermal Conductivity of Various Engineering Materials
Micromachines 2011, 2(2), 129-149; doi:10.3390/mi2020129
Received: 21 February 2011 / Revised: 5 April 2011 / Accepted: 8 April 2011 / Published: 15 April 2011
Cited by 9 | PDF Full-text (1167 KB) | HTML Full-text | XML Full-text | Correction
Abstract
The purpose of this paper is to present a simple micromechanics-based model to estimate the effective thermal conductivity of macroscopically isotropic materials of matrix-inclusion type. The methodology is based on the well-established Mori-Tanaka method for composite media reinforced with ellipsoidal inclusions, extended [...] Read more.
The purpose of this paper is to present a simple micromechanics-based model to estimate the effective thermal conductivity of macroscopically isotropic materials of matrix-inclusion type. The methodology is based on the well-established Mori-Tanaka method for composite media reinforced with ellipsoidal inclusions, extended to account for imperfect thermal contact at the matrix-inclusion interface, random orientation of particles and particle size distribution. Using simple ensemble averaging arguments, we show that the Mori-Tanaka relations are still applicable for these complex systems, provided that the inclusion conductivity is appropriately modified. Such conclusion is supported by the verification of the model against a detailed finite-element study as well as its validation against experimental data for a wide range of engineering material systems. Full article
(This article belongs to the Special Issue Advances in Micromechanics and Microengineering)
Open AccessArticle Optimization Strategy for Resonant Mass Sensor Design in the Presence of Squeeze Film Damping
Micromachines 2010, 1(3), 112-128; doi:10.3390/microm1010112
Received: 27 October 2010 / Revised: 17 November 2010 / Accepted: 6 December 2010 / Published: 14 December 2010
Cited by 2 | PDF Full-text (390 KB) | HTML Full-text | XML Full-text
Abstract
This paper investigates the design optimization of an electrostatically actuated microcantilever resonator that operates in air. The nonlinear effects of electrostatic actuation and air damping make the structural dynamics modeling more complex. There is a need for an efficient way to simulate [...] Read more.
This paper investigates the design optimization of an electrostatically actuated microcantilever resonator that operates in air. The nonlinear effects of electrostatic actuation and air damping make the structural dynamics modeling more complex. There is a need for an efficient way to simulate the system behavior so that the design can be more readily optimized. This paper describes an efficient analytical approach for determining the optimum design for a microcantilever resonant mass sensor. One simple case is described. The sensor design is a square plate that is coated with a functional polymer and attached to the substrate with folded leg springs. The plate has a square hole in the middle to reduce the effect of squeeze film damping. With the analytical approach, the optimum hole size for maximum sensitivity is found. Full article
(This article belongs to the Special Issue Advances in Micromechanics and Microengineering)

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micromachines@mdpi.com
Tel. +41 61 683 77 34
Fax: +41 61 302 89 18
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