By T.H.G. Megson
Aircraft constructions for Engineering Students is the prime self contained plane buildings path textual content. It covers all basic matters, together with elasticity, structural research, airworthiness and aeroelasticity. Now in its fourth version, the writer has revised and up-to-date the textual content all through and further new case examine and labored instance fabric to make the textual content much more available. encompasses a recommendations handbook on hand to all adopting lecturers.
* New association aids figuring out of the basics of structural research and emphasizes functions to aircraft
* New labored examples during the textual content reduction figuring out and relate innovations to genuine international applications
* extra assurance contains digital paintings, stress box beams, submit buckling habit, fabric houses, composite constructions and crack propagation
* an in depth plane layout undertaking case research exhibits the appliance of the key recommendations within the book
* finish of bankruptcy routines and accompanying Instructor's guide at http://textbooks.elsevier.com
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Additional resources for Aircraft Structures for Engineering Students (4th Edition)
4 A rectangular element in a linearly elastic isotropic material is subjected to tensile stresses of 83 and 65 N/mm2 on mutually perpendicular planes. Determine the strain in the direction of each stress and in the direction perpendicular to both stresses. Find also the principal strains, the maximum shear stress, the maximum shear strain and their directions at the point. 3. 220 × 10−4 200 000 In this case, since there are no shear stresses on the given planes, σx and σy are principal stresses so that εx and εy are the principal strains and are in the directions of σx and σy .
3 N/mm2 the negative sign arising from the fact that it is in the opposite direction to τxy in Fig. 8. 0 N/mm2 (acting in the direction AB) Different answers would have been obtained if the plane AB had been chosen on the opposite side of AC. 7 Principal stresses For given values of σx , σy and τxy , in other words given loading conditions, σn varies with the angle θ and will attain a maximum or minimum value when dσn /dθ = 0. From Eq. 10) Two solutions, θ and θ + π/2, are obtained from Eq. 10) so that there are two mutually perpendicular planes on which the direct stress is either a maximum or a minimum.
I = σII = 15 N/mm2 . All directions are principal directions. 5 A shear stress τxy acts in a two-dimensional ﬁeld in which the maximum allowable shear stress is denoted by τmax and the major principal stress by σI . Derive, using the geometry of Mohr’s circle of stress, expressions for the maximum values of direct stress which may be applied to the x and y planes in terms of the three parameters given above. 2 − τ2 Ans. σx = σI − τmax + τmax xy 2 − τ2 . 6 A solid shaft of circular cross-section supports a torque of 50 kNm and a bending moment of 25 kNm.