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      •   BUIR Home
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      • Bilkent Theses
      • Theses - Department of Mechanical Engineering
      • Dept. of Mechanical Engineering - Master's degree
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      Design and characterization of a micro mechanical test device

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      Author(s)
      Altıntepe, Elif
      Advisor
      Akay, Adnan
      Date
      2016-08
      Publisher
      Bilkent University
      Language
      English
      Type
      Thesis
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      Abstract
      Devices with micro- and nano- scale components are becoming more commonplace and demand for better quantification of the properties such as Young's modulus, stiffness, and damping of small-scale components is increasing. Since these properties can differ significantly from their bulk values, their direct measurements using a micro mechanical test device is offered in the thesis. The micro-scale test device described in this thesis consists of a platform that also includes subsystems to measure stress and strain, actuation, sample fabrication and grippers to mount the samples. A notch- exure based monolithic structure is used for the device platform to provide high-resolution precise motion. A piezoelectric actuator, a force transducer, and a vibrometer are used for actuation, force measurement and velocity measurement, respectively. Finite element analyses and experiments are carried out in order to characterize the apparatus as a micro mechanical test device. Static, time-dependent cases are analyzed and its eigenfrequencies are determined. Required calibrations and drift analysis of instruments are conducted. Force and velocity relations are obtained, and results are evaluated for linearity and repeatability. Finally, operating range of proposed device is determined for use as a micro mechanical test device.
      Keywords
      Micro mechanical test device
      Circular hinge
      Monolithic structure
      Piezoelectric actuator
      Permalink
      http://hdl.handle.net/11693/32201
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      • Dept. of Mechanical Engineering - Master's degree 86
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