Analytical Report on Aeronautical Design

Magnetostrictive Actuators in Aeronautical Design

The purpose of this paper is to provide an application oriented stateoftheart review of smart materials and magnetostrictive actuators in aeronautical design. Smartness describes selfadaptability, selfsensing, memory, and multiple functionality of the materials or structures.

These characteristics provide numerous possible applications for these materials and structures in aerospace, manufacturing, civil infrastructure systems, and biomechanics. Active vibration and acoustic transmission control, active shape control, and active damage control are some of those areas which have found

attractive applications for smart materials and structures. Examples of specific applications are micropositioning, vibration isolation, fast acting valve and nozzles, transducers, luxury car shocks, and active engine mounts in aircrafts. System integration, mass and energy consumption reduction, elimination of moving parts in actuators, and collocation between actuator and sensor are some of the benefits of using smart materials. Those smart materials covered in this review are primarily piezoelectric, shape memory alloys, and magnetostrictive.

Until quite recently machinery tended to overcome resistance by dint of shear strength or power. Aircraft, while becoming more streamlined over the last 50 plus years, have tended to rely on more powerful en

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tion of the magnetic field. As the field is increased, more domains rotate and become aligned until magnetic saturation is achieved. If the field is reversed, the direction of the domains is also reversed but the strains still result in a position expansion in the field direction. Since the magnetostrictive forces are molecular in origin, the mechanical response is very fast; a matter of microseconds. On the macroscopic scale, a magnetostrictive material conserves volume (of an essentially incompressible material); the diameter decreases as the length grows. The effect generates elastic forces in accordance with a generalized Hooke's law. 3.0 Evaluation of Magnetostrictive Materials in Aeronautical Design There are two approaches to the development of smart materials and structures. One, involving synthesizing new materials at the atomic and molecular levels with smart functions, is less mature and will depend on new scientific discoveries (Calkins, et al, 1994). The second approach involves developing new materials by synthesizing composite materials and structures from known constituents. The active elements are either embedded in, or attached to, conventional structural materials. Fiber optics and piezoelectric ceramic
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Some common words found in the essay are:
Design Abstract, Conclusion Significant, Aeronautical Design, Kannan Dasgupta, World Solutions, Clark AE, Wing Program, ARO Review, Engineering/ CIME, Swenbeck JR, smart materials, magnetic field, materials structures, shape memory, magnetostrictive material, smart structures, smart materials structures, et al, magnetostrictive materials, al 1994, aro review, et al 1994, mechanical engineering/ cime, calkins et al, smart wing program,
Approximate Word count = 4261
Approximate Pages = 17 (250 words per page)

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