A New Greedy Randomized Adaptive Search Procedure for Multiobjective RNA Structural Alignment
Inherently Adaptive Structural Materials
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Transcript of Inherently Adaptive Structural Materials
Inherently Adaptive Structural Materials
Technova Corporation
Outline of the Presentation
Structural and Adaptive Qualities of BoneBiomimetic Principles of Adaptive MaterialsDesign & Evaluation of Integrated Adaptive SystemsProcessing of NanocompositesModeling and Validation of Structural Principles
Development of Bone Structure
Cancellous Bone Compact Bone
Mechanisms of Bone AdaptationLoads Build of Bone
Strains
Comparison Signal
Remodeling
Electrical Potential Gradient Under Bending Bone Remodeling Under Bending
Consequences of Bone Adaptation
Arrangement of Struts Along Principal Strain Lines
Optimization of Topology
Outline of the Presentation
Structural and Adaptive Qualities of Bone
Biomimetic Principles of Adaptive Materials
Design & Evaluation of Integrated Adaptive Systems
Processing of Nanocomposites
Modeling and Validation of Structural Principles
Key Constituents and Processes
Piezoelectricity
Electrolysis
Solid Electrolytes
+ + + + + + + + +- - - - - - - - - +
++
+
--
--
V = g.s.tQ = d.s.A
V = Vo + i.R + VeQ = n.F
Experimental Validation of Electrolysis Through Solid Electrolyte
Electrolytic Cell
-50 -40 -30 -20 -10 0 10 20 30 40 50Voltage, mV
-1.00
-0.75
-0.50
-0.25
0.00
0.25
0.50
0.75
1.00
Cur
ren t
, mA
Voltammogram Micrographs
Design & Validation of Piezo-Driven Electrolysis
+ + + + + + +- - - - - - - Stainless Steel Mesh
Copper-Ion Conduct ing PolymerCopper Layer
Piezoelectric Stack
Applied Stress:
Stress, MPa
Time, sec
30
1
Outline of the Presentation
Structural and Adaptive Qualities of BoneBiomimetic Principles of Adaptive MaterialsDesign & Evaluation of Integrated Adaptive SystemsProcessing of NanocompositesModeling and Validation of Structural Principles
Designs and Validation of a Basic SystemReplicated Multilayers of: Insulative Lay Conductive Layer (Tc) Piezoelectric Layer (Tp) Solid Electrolyte Layer (Ts) Metallic Layer (Tm)
T
L
W
W1
L1
Schematic Presentation
V = g33.s.Tp
Q = d33.s.(n.L1.W1)
er (Ti)
Processing and Test Set-Ups
System Ti Tc Tp Ts Tm
I (conventional) 50 µm 50 µm 50 µm 50 µm 50 µm
II (nanocomposite) 5 nm 5 nm 50 nm 40 nm 40 nm
Alternative Designs
An Elaborate Adaptive Element
A A
Section A-A
Nanolayered CompositeComprising Replicated:
Insulative Nanolayer (Ti)Conductive Nanolayer (Tc)Piezoelectric Nanolayer (Tp)Solid Electrolyte Nanoayer (Ts)Metallic Nanoayer (Tm)
(a) (b) (c)
e
e
Mass Transfer
(d)
e
e
(e)
+ +
+ +
- -
--
Mass Transfer
Detailed System Design and Analysis
A A
Section A-A
Nanolayered CompositeComprising Replicated:
Insulative Nanolayer (Ti = 5 nanometer)Conductive Nanolayer (Tc = 5 nanometer)Piezoelectric Nanolayer (Tp = 150 nanometer)Solid Electrolyte Nanoayer (Ts = 40 nanometer)Metallic Nanoayer (Tm = 150 nanometer)
10 mm
1 mm
1 m
(a) Concentric Loading (b) Eccentric Loading
e
e
(c) Concentricity Restored by Self-Adaptation
8.33 MPa 43 MPa-26 MPa
8.33 MPa
System Design
Structural & Adaptive Analysis
Preliminary Assessment of Structural Implications
Preliminary Assessment of Structural Implications
Outline of the Presentation
Structural and Adaptive Qualities of BoneBiomimetic Principles of Adaptive MaterialsDesign & Evaluation of Integrated Adaptive SystemsProcessing of NanocompositesModeling and Validation of Structural Principles
Ionic Self-Assembly: Basic Principles
Mechanism of Self-Assembly Build-Up of Nanolayers
Adaptation of Ionic Self-Assembly
Subst rate / PEI
PEI/[PSS/PAH]3
PEI/[PSS/PAH]3 Au]1
PEI/[PSS/PAH]3 Au/PAH]2
PEI/[PSS/PAH]3 Au/PAH]3
Substrate
PAH/PS119
PAh/PS119/ZrO2
Mult iple ZrO2/Polymer Layers
Manual and Automated Processing Self-Assembly of Colloidal Nanoparticles
Self-Assembly of Piezoelectric and Conducting Nanolayers
FElect rode
V
C0
Electrode
ITO-Coated Glass Substrate
Ionically Self-Assembled,Mult ilayer PSS/PDDA System
00.20.40.60.8
11.21.41.61.8
2
0 1 2 3 4 5 6 7
Applied Force, g
Out
put V
Olta
ge, m
V
Outline of the Presentation
Structural and Adaptive Qualities of BoneBiomimetic Principles of Adaptive MaterialsDesign & Evaluation of Integrated Adaptive SystemsProcessing of NanocompositeModeling and Validation of Structural Principles
Section-Level Structural Modeling
Modeling Principles
∫ ∫ =+c lA A llcc NdAfdAf
∫ ∫ =+c lA A llcc MydAfydAf
Effect of Hybrid Nanolayer Build-Up on RVC Section Behavior
Preliminary System-Level Analysis
(a) Bending (b) Buckling (c) Yielding (d) Fracture
Failure Modes
Effect of Multi-Layer Polymer/Ceramic/Metal Build-Upon Bulk Properties of RVC Open-Cell System
11Tensile Strength
21Elastic Modulus
3.9Density
Composite/Base RatioProperty
Preliminary Structural Evaluation
Open-Cell Structure and Tension Test Set-Up
Strain, mm/mm
Stre
ss, M
Pa
0.002 0.004 0.006 0.008 0.010 0.012 0.014 0.016
0.03
0.06
0.09
0.12
0.15
0.18
As-Received
After Deposition ofPolymeric Nanolayers
Effect of Polymer Nanolayers on Tensile Behavior of Open-Cell Structure
Summary & Conclusions
Selection of adaptive system constituents and viable architectures
Modeling, design and experimental validation of adaptive structures
Implementation of nanocomposite processing techniques
Modeling and validation of structural principles