College seminar on "Smart Materials"

1. PRESENTED BY:-
ASHISH JAISWAL
B.TECH(ME)

2. Outline
 Introduction
 Comparison between materials
 Smart materials
 Smart sensors and actuators
 Classification
 Application
 Conclusion
 References

3. Introduction
Reference: www.elsevier.com/locate/compstruct

4. Traditional v/s Smart system
• Designed for certain performance requirements e.g. load,
speed, life span.
• Unable to modify its specifications if there is a change of
environment.
Traditional
• Can accommodate unpredictable environments.
• Can meet exacting performance requirement.
• Offer more efficient solutions for a wide range of
applications.
Smart system

5. Smart Materials
Smart materials are material that has to respond to stimuli and
environmental changes and to activate their function according these
changes.
The several external stimuli sensitive for Smart Materials are:-
 Temperature
 Pressure
 Light
 Electric flow
 Magnetic flow
 Electric fields
 Magnetic fields

6. Why smart Sensors and Actuators ?
 Real time response
 Exploit functional properties
 Minimal effect on structural properties
 Reduction in weight
 Less power consumption
 Better reliability

7. Smart Materials as Sensors &
Actuators
Stress Electric potential
Electric/
Magnetic/ Strain
Thermal Stimulus
Direct Effect
(Sensor)
Reverse Effect
(Actuator)
• All Piezoelectric Materials
• Magnetostrictive Materials
• Optical Fiber
• Ferroelectrics Perovskites, Piezoceramics
• Terfenol-D, Amorphous Met-Glasses
• Terfenol-D, Amorphous Met-GlassesS

8. Types of Smart Materials
 Piezoelectric materials
 Magneto restrictive materials
 Active smart polymer
 Shape memory alloy

9. Piezoelectric Materials
Generate an electric charge in response to applied
mechanical stress and vice versa.
(a) A piezoelectric–
composite-based
damping system for a
vertical fin of the F/A-18;
(b) MFC actuator for a
small projectile fin; (c) it
is motion mimicking
birds’ flight (d) A smart
flapping wing actuated
by an MFC.

10. Magneto- Restrictive Materials
Change in dimension of ferromagnetic material in
magnetic field and vice versa.
TALON (Tactical Acoustic Littoral Ocean Network) sonar system uses
Magneto strictive Terfenol-D for under-water submarine detection

11. Active smart polymer
 These are high-performance polymers that change
according to the environment they are in.
 Sensitive to temperature, humidity, pH, wavelength,
intensity of light electrical or magnetic field, etc.

12. Shape memory alloy
 Shape Memory Alloys (SMA) are materials that can hold
different shapes at various temperatures.
 They can be deformed and returned to their original shape by
heating, e.g., NiTiNOL

13. Application of Smart Materials
 Structural Health Monitoring
 Self-Repair
 In the Field of Defense and Space
 Biomedical Applications
 Reducing Waste
 Health

14. Conclusion
The technologies using smart materials are useful for both new
and existing process and technologies. Future application by
adaptation of Smart Materials in civil engineering, medicine,
transportation, space and other areas can greatly boost the
development and also quality of life. Of the many emerging
technologies available the few described here need further
research to evolve the design guidelines of systems.

15. References
 National Programme on Technology Enhanced Learning (NPTEL)
https://nptel.ac.in/courses/112104251/4
 Prof. Parihar A.A., Ms. Kajal D. Khandagale, Ms. Pallavi P. Jivrag
“Smart Materials”
http://iosrjournals.org/iosr-jmce/papers/vol13-issue5/Version-6/D1305062832.pdf
 Susmita Kamila
“Introduction, Classification and Applications of Smart Materials: An Overview”
https://thescipub.com/PDF/ajassp.2013.876.880.pdf

16. Thank You for
paying attention.

17. Questions &
Comments ?