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Smart Intelligent Aircraft Structures

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structures which have the ability to adapt to environmental conditions according to the design requirements

Aircraft Structures offers significant improvements in aircraft total weight, manufacturing cost and, above all, operational cost

its helps to improve the aircraft’s life cycle and reduce its maintenance.

Ability to decrease airframe generated noise and hence reduce the effect of air traffic noise near airports

cruise drag reductions have a positive effect on fuel consumption and required take-off fuel load

Requirement

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like birds Aircraft wing made intelligent way,It have smart characteristics just likeBird

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intelligently controlling the wing’s moving surfaces using on-board computer systems, the wing will be “morphed” while airborne – tailoring it for maximum aerodynamic efficiency in the various phases of flight

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An adaptive compliant wing is a wing which is flexible so that aspects of its shape can be changed in flight

Adaptive wingstructure

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At level flight

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Climbing

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Variable wing structure

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Birds wing bone Structure

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Gripper mechanism

Minimize or eliminate assembly requirements Excellent repeatability since there is no backlash No joint means no friction ,backlash, or need of lubrication Can easily couple with Morden actuators, such as piezoelectric, shape-

memory alloy, electro thermal, electrostatic , fluid pressure and electromagnetic actuator

Create motions not possible with conventional rigid devices Material friendly can be built from any highly resilient material, including

steel ,Aluminium ,nickel

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Adaptive wing

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Smart materials

“smart responds to a stimulus with one predictable action”

• normal materials have limited responses• smart materials have appropriate responses• ... but response is the same every time

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What the airframe requires

Bending

Bending andTorsion

Impact

Shear stress due to trans-verse shear and torsion

Compression due to bending,stability, static strength,corrosion resistance

High localloads

Hoopstress

Impact

Impact

Impact

Shearstress

Hoop stress and longi-tudinal stress

Longitudinal stressStatic/residual strengthCrack growth

Upper skin:Compression/stabilityLower skin:Tension/crack growth

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By shearing wisdom of nature we are closed to nature perfection

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CFRP Floor Beamsfor Upper Deck

CFRP Wing Ribs

CFRP Section 19.1

CFRP Section 19

GLARE®

CFRP Center Wing BoxIntegral Structures (LBW)

More Ti & New Ti-processing(electron beam welding)

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Carbon nanotubes have a number of valuable and unique properties, including:High thermal and electrical conductivityOptical propertiesFlexibilityIncreased StiffnessHigh tensile strength (100 times stronger than steel per unit of weight)Light weightRange of electro-conductivityAbility to be manipulated yet remain strongWhen applied to products, these properties provide tremendous advantages. For example, when used in polymers, bulk carbon nanotubes can improve the electrical, thermal, and electrical properties of the products.

Carbon nanotube

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Self Monitoring

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Monitor The structural integrity

Like Nerve system of bird

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Self healing&

Self cleaning

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Biomimetics: Lotus effect• most efficient self-cleaning plant

= great sacred lotus (Nelumbo nucifera)

• mimicked in paints andother surface coatings

• pipe cleaning in oil refineries (Norway)

Self cleaning

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Self HealingCarbon nanotube networksThrough dissolving a linear polymer inside a solid three-dimensional epoxy matrix, so that they are miscible to each other, the linear polymer becomes mobile at a certain temperature When carbon nanotubes are also incorporated into epoxy material, and a direct current is run through the tubes, a significant shift in sensing curve indicates permanent damage to the polymer, thus ‘sensing’ a crack. When the carbon nanotubes sense a crack within the structure, they can be used as thermal transports to heat up the matrix so the linear polymers can diffuse to fill the cracks in the epoxy matrix. Thus healing the material.

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By using right material in right palace Intelligent Design Adaptive wing structure Self monitoring Self healing Self cleaning Step by step airframe is moving ever closerTo nature perfection to birdBy shear the sky with bird we can rediscoverThe wisdom of nature

Conclusion

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Thank you