Engineering Mechanics The Mother of all Engineering

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Engineering MechanicsThe Mother of all
Engineering

• Ok most of engineering
• Like Mechanical, Aero, Civil, Chemical, Mining,
• Mechanics is the basis for most of the
  engineering disciplines
• Motion
• Solids and Materials
• Fluids
• Biomechanics

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What is Engineering?

• Engineering the process of developing and
  making a thing
• Science is concerned with understanding the world
  as it is
• Engineers are problem solvers people who search
  for quicker, better, less expensive ways to use
  forces and materials of nature to meet tough
  challenges

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Dynamics, Flight Control, Vibrations, Wave
Propagations
Motion
Mode 0 Rigid
Mode 1 0.69 Hz
In plan bending
Mode 2 1.67 Hz
Mode 3 4.70 Hz
Mode 4 5.69 Hz
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Solids
Strength of materials, structures, composites
Two beams were removed after 15 months of service
to assess remaining strength and stiffness
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Prototype Composite Bridge Deck
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FRP Deck In-Service
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Structural Composite Fire Analysis
NIST FDS Fire Simulation Thermal boundary
conditions

• Thermal Mechanical Property Evolution
• Elastic property evolution
• Compression micromechanics
• Visco elastic/plastic effects

Click to play movie
Load
Fire

• Fire-Load Simulation of Structural Bulkhead
• Packaging of mechanics and property evolution
  with user defined subroutines
• Trial modeling efforts

Structural FEA Implementation
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Fluid Mechanics Aerodynamics, Internal Flow,
Supersonics, Computational Methods, Experimental
Techniques

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The general unsteady vortex-lattice method (VLM)

• Two Types of Vortex Sheets ( Bound-Vortex and
  Free-Vortex)
• VLM accounts for
• Deformation of wakes
• Aerodynamic interference of the components
  of the configuration.

C.P.
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The general unsteady vortex-lattice method

VLM is not restricted by Planform
Camber Twist Dihedral angle
Sink rate Angle of attack, etc.
Free-Vortex Sheets
Bound-Vortex Sheets
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• Longbow Wind Turbine
• Aaron Barr, Enoch Dames, Kai Zuehlke
• Advisor Dr. Ishwar Puri
• Goal To Improve the design of a 900W
  upward-furling wind turbine. The existing Lakota,
  manufactured by Aeromax Corporation, features
  external furling springs and an electrical
  conduit that are prone to weathering. The
  enlarged Longbow design will incorporate these
  functions within a protective housing and allow
  room for additional components.

• Design Overview
• Design an internal torsion-spring furling system
• Redesign upper and lower housings
• Fluids and mechanics analysis of turbine during
  furling
• Structural and thermal FEA of housing designs
• Internalize wiring
• Improve serviceability
• Add a composite dome to enclose new circuitry
• Retain time-tested Lakota components
• Install a Lakota turbine for additional testing
  of existing design

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Unsteady Jet at Leading Edge of Supersonic
Aircraft
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Proposed Hitchhiker Demonstration Program
VISTA F-16
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Delta Wing Vortex Breakdown
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Poly-dispersed Multi-Phase flows

• Separation of phases based on size
• Cross correlation based PIV used to measure
  velocity of flow
• Particle tracking used to measure Particle and
  Bubble velocities

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The Design
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Biomechanics

• Musculosceletal
• Biofluids
• Cardiovascular Hemodynamics
• Mechanical Heart Valves
• Heart simulators
• Stents
• Left Ventricle
• Workhorse of the Heart
• Mitral Valve
• Aortic Valve

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The Design
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Vortex Formation From Mechanical Valve Leaflets
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What is Engineering Science and Mechanics?

• Often called the engineers engineering
• Youll focus on the principles of mechanics that
  form the foundation of disciplines such as
  aerospace, civil, mechanical, and even chemical
  engineering
• Youll use advanced mathematics and analysis to
  understand and derive models for phenomena such
  as fluid flow, vibration, and structural
  behaviors
• Youll develop new technologies and solve current
  (and future) engineering problems