Smart Materials \n##### Smart or intelligent materials are materials that have to respond to stimuli and environmental changes and to activate their functions according to these changes. The stimuli like temperature, pressure, electric flow, magnetic flow, light, mechanical, etc can originate internally or externally.\n\n# PROPERTIES OF SMART MATERIALS \n##### • Sensing materials anddevices \n##### • Actuation materials anddevices \n##### • Control devices andtechniques \n##### • Self-detectio self-diagnostic \n##### • Self-corrective, self-controlle self-healing \n##### • Shock-absorbers, damagearrest\n\n# APPLICATIONS \n##### • Aircrafts \n##### • Orthopedic surgery \n##### • Dental braces \n##### • Robotics \n##### • Reducing vibration of helicopter blades \n##### • Smart fabrics \n##### • Sporting goods\n\n\n# MERITS \n##### • Bio-compatibility \n##### • Simplicity \n##### • Compactness \n##### • Safety mechanism \n##### • Good mechanical properties\n\n# DEMERITS \n##### • More expensive \n##### • Low energy efficiency \n##### • Complex control \n##### • Limited bandwidth\n\n# Conclusion\n#### • Today, the most promising technologies for lifetime efficiency and improved reliability include the use of smart materials and structures. Understanding and controlling the composition and microstructure of any new materials are the ultimate objectives of research in this field, and is crucial to the production of good smart materials. \n#### • New and advanced materials will definitively enhance our quality of our life.