Engeering Horizon

SMART MATERIALS – JULY 2014

SMART MATERIALS – JULY 2014

SMART MATERIALS – JULY 2014
August 08
08:00 2014

 

SMART MATERIALS – JULY 2014

Any material that responds to a specified environment or condition in a sensible manner is termed as a “smart material.” These materials are tailored to receive, transmit or process a stimulus and respond by producing a useful effect, which could be further exploited to prompt a system. Some of the stimuli that are utilized to trigger these materials are strain, stress, temperature, chemicals, electric field, magnetic field, hydrostatic pressure and different types of radiation. The effect can be caused by absorption of a proton, a chemical reaction, integration of a series of events, translation or rotation of segments within the molecular structure, creation and motion of crystallographic defects or other localized conformations, alteration of local¬ized stress and strain fields, and others. The effects produced can be a color change, a change in index of refraction, a change in the distribution of stresses and strains, or a volume change. Smart materials are normally integrated into smart structures to enhance the output features.

Few examples of smart materials and structures are composite materials embedded with fiber optics, actuators, sensors, micro-electromechanical systems (MEMSs), vibration control, sound control, shape control, product health or lifetime monitoring, cure monitoring, intelligent processing, active and passive controls, self-repair (healing), artificial organs, designed magnets, damping aero-elastic stability and stress distri¬butions. Smart structures are now being commonly used in automobiles, space systems, naval vessels, civil structures, machine tools, recreation, and medical devices. Smart materials encompass all fields of science and engineering; for that reason only a few classes of smart materials are described here.

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Engineering Horizons

Engineering Horizons

“Engineering Horizons” is the first & leading technical magazine of Pakistan covering Process, Mechanical, Metallurgical, Mining, Electrical & Electronics field under a single cover. We also feel pleasure in saying that this is the only magazine of its own kind & style, which is widely circulated in all Engineering Sectors of Pakistan.

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