smart materials in civil engineering a small introduction

1. SMART MATERIALS IN CIVIL ENGINEERING
JDIVYAJOHNS
ASSISTANTPROFESSOR
NOORULISLAMCENTREFORHIGHEREDUCATION,
KUMARACOIL

2. SMART MATERIALS
 The materials which can change its properties in a defined way, whenever they
are exposed to any external stimuli, are called smart materials.
 The stimuli can be an electromagnetic wave, electric current, pressure, UV rays,
friction, chemicals, etc.

3. Why Smart material used
 Smart materials can be used in different types of industries, such as the
electronics and construction industries. Some of the most popular smart materials
have heat-resistant, self-curing and self-assembling properties. These materials
can be used to manufacture strong, efficient and sustainable products.

4. The history of smart materials
 The first recorded observation of smart material transformation was made in 1932
on gold-cadmium. In addition, in 1938 the phase transformation was observed in
brass (copper- zinc).
 The history of smart materials dates back to the 1960s, when scientists began
studying materials that changed shape in response to external stimuli. Since then,
many advances have been made in this field, thanks in part to advances in
nanotechnology and materials engineering research

5. How is smart material used
 Smart materials possess a unique ability to change its shape in response to the
external stimulus like temperature, pressure, electric field, magnetic field, etc. The
mechanical properties of smart materials are extremely essential in several
biomedical applications in orthopedics and cardiovascular treatments etc

6. Properties of smart materials
Mechatronics technology requires these smart or intelligent materials with certain
properties, to change or adapt their behavior according to the externally controlled
condition, including temperature, stress, strain, light, pressure, electric field, magnetic
field, moisture, pH value, different types of radiation, etc

7. Smart materials main properties
They have some amazing properties that distinguished them from other materials,
such as
 Transiency: they can respond to various types of external stimulus, Immediacy:
the response time very less.
 Self-actuation: this is the ability to change their appearance and shape.
 Selectivity: the response is divided and expected.

8. Smart material classification
Smart Materials are categorized on the basis of their properties such as Active and
Passive.
 Active Smart Materials possess the capability of modifying their geometric and
material properties under the application of electric, thermal or magnetic fields
there by acquiring an inherent capacity to transduce energy
 Passive smart materials are materials that can sense external stimuli but cannot
transduce or react

9. Smart Material Engineering Services
Smart Materials are materials that respond to changes in their environment and then
undergo a material property change. These property changes can be leveraged to
create an actuator or a sensor from the materials without any additional control or
electronics required

10. The advantages of smart materials
The main advantages of Smart Material consist of their high mechanical performance,
high damping capacity, large actuation force, compactness, and lightness.

11. The disadvantages of smart materials
Smart materials made of polymers are lightweight and have good elasticity as well as
high transparency but they also have several disadvantages such as weak
mechanical strength, a long response time, and terrible environmental stability

12. difference between materials and smart materials
These materials can sense the stimulus and respond by altering their physical,
chemical, or mechanical properties. The term "smart" emphasizes the material's ability
to adapt or change in a predefined manner based on the applied stimulus.

13. THANK YOU