introduction to mechanical engineering gk12 student: kyle barr professor frank fisher department of...
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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
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”?
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
Formula SAE car• asdasdad
Yield strengthsSteel, high strength 700 MPaAluminum 200 MpaPolycarbonate 50 Mpa
Rough values, depend on number of variables
Fencing Training Device
Engineers Without Borders (EWB)
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)
• 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)
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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
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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
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
EXAMPLE: Structural Health Monitoring (SHM)
This is not good!!
Could this help?
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
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