Introduction to Mechanical Engineering GK12 Student: Kyle Barr Professor Frank Fisher Department of...
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![Page 1: Introduction to Mechanical Engineering GK12 Student: Kyle Barr Professor Frank Fisher Department of Mechanical Engineering Stevens Institute of Technology.](https://reader035.fdocuments.in/reader035/viewer/2022062321/56649ea85503460f94bac8cd/html5/thumbnails/1.jpg)
Introduction to Mechanical EngineeringGK12 Student: Kyle Barr
Professor Frank Fisher
Department of Mechanical Engineering
Stevens Institute of Technology
Web: http:://www.stevens.edu/nanolab
Email: [email protected]
Supported by: NSF Graduate Teaching Fellow in K-12 Education ProgramAssociated Institution: Stevens Institute of Technology - Hoboken, NJ
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What does a mechanical engineer do?
• Here are some examples from the professors at Stevens:
– Materials design and modeling (advanced materials, composites, etc)
– Thermodynamics (engines, energy conversion, etc)
– Robotics and automated processes
– Manufacturing and metal forming
– Structural design
– Fluid mechanics
– Heat transfer and thermal design
– Vibrations and acoustics
– Emerging technologies: Micro-electrical-mechanical systems (MEMS), Nanotechnology, etc
• These are examples of the “areas” of mechanical engineering…
• What are some applications of “fluid mechanics”?
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Senior Design Projects in Mech Eng
• Autonomous Robotic Vacuum Cleaner
• Piezoelectric-based Energy Harvesting Methodology
• Formula SAE Competition: Suspension System
• Automated Medication Container Openers
• Heavy Lift Cargo Plane
• NASA Exploration Systems Mission Project
• Design of a Robotic Push Golf Cart
• Human-Powered Potable Water Still
• Wearable Ultra Sensitive Nano Gas Sensor
• Hydroelectric System Design
• Robotic Fencing Training Dummy
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Formula SAE car• asdasdad
Yield strengthsSteel, high strength 700 MPaAluminum 200 MpaPolycarbonate 50 Mpa
Rough values, depend on number of variables
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Fencing Training Device
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Engineers Without Borders (EWB)
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My research interests…
1. Mechanics of Advanced Materials (relationship between force and
elongation)
– Shape memory alloys (online demos here)
– Piezoelectric materials
– Composite materials
2. Computer Aided Engineering (CAE)
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• MRI: Acquisition of an instrument for nanoscale manipulation and experimental characterization, NSF DMI-0619762, 09/01/06-08/31/09, $326k
Nanomechanics and Nanomaterials Lab (Fisher)
Nanomechanics and Nanomaterials Lab http://personal.stevens.edu/~ffisher
Processing-induced Crystallization of Semicrystalline Nanocomposites (Kalyon)
Piezoelectric Energy Harvesting (Shi, Prasad, ECE…)
Polymer Nanocomposite NanomechanicsNanomanipulation and Nanomechanical Characterization (Shi, Yang, Zhu)
• Challa, Prasad & Fisher, Measurement Sci. & Tech., under review• Challa, Prasad & Fisher, Smart Mat. & Struct. 18, 095029 (2009)• Challa, Shi, Prasad & Fisher, Smart Mat. & Struct. 17, 015035 (2008)
• Mago, Kalyon & Fisher, J. Appl. Polym. Sci. 114, 1312 (2009)• Mago, Fisher & Kalyon, J. Nanosci. & Nanotech. 9, 3330 (2009)• Mago, Kalyon & Fisher, J. Nanomaterials 3, 759825 (2008)• Mago, Fisher & Kalyon, Macromolecules 41, 8103 (2008)
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• Fisher & Lee, Composites Science and Technology (to be submitted)• Fisher, Oelkers & Lee, Composites Science and Technology (to be submitted)
E(t) E E j e t
j
j1
N
Ardil I Sr C0
1 Cr C0 1
C f0C 0 fr Cr Ardil
r1
N 1
f0 I fr Ar
dil r1
N 1
1
Using nanoparticles + processing to promote preferred crystalline phases Harvesting energy from ambient vibrations for wireless sensors
In situ SEM characterization of nanomaterials and nanocomposites Novel micromechanical modeling for polymer nanocomposites
QuickTime™ and aTIFF (Uncompressed) decompressor
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QuickTime™ and aTIFF (Uncompressed) decompressor
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Vibration Energy Harvesting (VEH)
VEHD
Vibrating Structures
Electrical Energy
Electrostatic
+_
Electromagnetic
+_
Piezoelectric
+_
High amplitude of vibration = High power output
MagnetostrictiveHuang et al SPIE 03
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Potential Energy Harvesting ApplicationsLow Power Devices
Active Pixel Sensor: 100 µW
Advanced Microcontroller: 0.05 W
Gas Nanoscale Sensor: 200 µW
Wireless Sensor Node: 300 µW
Wireless Sensing
Wireless Security Systems
Naval Applications
Tire Pressure Monitoring
Remote Structural Monitoring
Military Applications
Portable Medical Devices
Asset Tracking
VEHD
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EXAMPLE: Structural Health Monitoring (SHM)
This is not good!!
Could this help?
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Current State of the Art
@ UC Berkeley
@ Univ of Southampton, U.K
@ Georgia Tech.
CommercialK1
M1
Single degree of freedom system
Academic
@ MIT
@ NCSU, Raleigh
Many of the VEH Devices are single resonant
frequency based
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Magnetically Tuned Resonant Frequency
Technique
Attractive Mode: ωdevice < ωbeam
Repulsive Mode: ωdevice > ωbeam
V. Challa, MG Prasad, Y. Shi, and FT Fisher (2008), Smart Materials and Structures, 17, 015035
Tuned EH Device: exp. results
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Tuned EH Device: modeling