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Full-Text Articles in Mechanical Engineering
Development Mems Acoustic Emission Sensors, Adrian Enrique Avila Gomez
Development Mems Acoustic Emission Sensors, Adrian Enrique Avila Gomez
USF Tampa Graduate Theses and Dissertations
The purpose of this research is to develop MEMS based acoustic emission sensors for structural health monitoring. Acoustic emission (AE) is a well-established nondestructive testing technique that is typically used to monitor for fatigue cracks in structures, leaks in pressurized systems, damages in composite materials or impacts. This technology can offer a precise evaluation of structural conditions and allow identification of imminent failures or minor failures that can be addressed by planned maintenances routines. AE causes a burst of ultrasonic energy that is measured as high frequency surface vibrations (30 kHz to 1 MHz) generated by transient elastic waves that …
Self-Assembly Kinetics Of Microscale Components: A Parametric Evaluation, Jose Miguel Carballo
Self-Assembly Kinetics Of Microscale Components: A Parametric Evaluation, Jose Miguel Carballo
USF Tampa Graduate Theses and Dissertations
The goal of the present work is to develop, and evaluate a parametric model of a basic microscale Self-Assembly (SA) interaction that provides scaling predictions of process rates as a function of key process variables. At the microscale, assembly by “grasp and release” is generally challenging. Recent research efforts have proposed adapting nanoscale self-assembly (SA) processes to the microscale. SA offers the potential for reduced equipment cost and increased throughput by harnessing attractive forces (most commonly, capillary) to spontaneously assemble components. However, there are challenges for implementing microscale SA as a commercial process. The existing lack of design tools prevents …
Design Of Contact Line Friction Measurement Machine Apparatus, Seyed Kamran Najafi
Design Of Contact Line Friction Measurement Machine Apparatus, Seyed Kamran Najafi
USF Tampa Graduate Theses and Dissertations
The purpose of this project is to design and manufacture a high precision machine to directly measure the surface force of fluids. Knowing how to move droplets easier with less resistance can increase the potential of a wide range of applications and improve the performance of things such as self-assembly applications. This machine has the ability to measure forces of up to 100 N with a MEMS based sensor. The motion system on this machine moves a substrate underneath of a droplet for 100 mm and applies dragging force to the sensor. It moves with a controlled speed with high …