Aircraft Structures for Engineering Students, Fourth Edition by T.H.G. Megson

By T.H.G. Megson

Plane constructions for Engineering scholars is the prime self contained airplane constructions path textual content. It covers all basic topics, 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 additional new case examine and labored instance fabric to make the textual content much more obtainable. encompasses a ideas guide on hand to all adopting lecturers. * New association aids realizing of the basics of structural research and emphasizes functions to aircraftstructures* New labored examples in the course of the textual content relief figuring out and relate strategies to genuine global functions* extra insurance comprises digital paintings, rigidity box beams, submit buckling habit, fabric houses, composite constructions and crack propagation* an intensive plane layout venture case learn exhibits the appliance of the main concepts within the ebook* finish of bankruptcy routines and accompanying Instructor's handbook at http://textbooks.elsevier.com

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Additional resources for Aircraft Structures for Engineering Students, Fourth Edition (Elsevier Aerospace Engineering)

Sample text

Suppose that a small element of a body has dimensions δx, δy and δz. 54) The constant E/3(1 − 2ν) is known as the bulk modulus or modulus of volume expansion and is often given the symbol K. 15 Stress–strain relationships An examination of Eq. 5 since a body cannot increase in volume under pressure. Also the lateral dimensions of a body subjected to uniaxial tension cannot increase so that ν > 0. 33 below the elastic limit. 5. 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.

Therefore, by comparison with Eq. e. 6 A composite bar of length L has a central core of copper loosely inserted in a sleeve of steel; the ends of the steel and copper are attached to each other by rigid plates. If the bar is subjected to a temperature rise T determine the stress in the steel and in the copper and the extension of the composite bar. The copper core has a Young’s modulus Ec , a cross-sectional area Ac and a coefficient of linear expansion αc ; the corresponding values for the steel are Es , As and αs .

In fact we shall consider only the simple case of linearly elastic isotropic materials for which stress is directly proportional to strain and whose elastic properties are the same in all directions. A material possessing the same properties at all points is said to be homogeneous. Particular cases arise where some of the stress components are known to be zero and the number of unknowns may then be no greater than the remaining equilibrium equations which have not identically vanished. The unknown stresses are then found from the conditions of equilibrium alone and the problem is said to be statically determinate.

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