By T.H.G. Megson
'Aircraft constructions for Engineering Students' presents a very self contained path in airplane constructions, inclusive of dialogue at the basics of elasticity and plane structural research, in addition to the linked subject matters of airworthiness and aeroelasticity. even supposing a lot of the elemental fabric is undying, the writer has up-to-date the textual content all through, together with new fabric on components that experience constructed because the final version - in either academic and technological phrases. in addition to broad revisions, the recent version contains a ideas handbook for all finish of bankruptcy difficulties to accompany the text.
The growth of aviation makes plane constructions an more and more vital subject at undergraduate point. on the grounds that its unique book in 1972, this e-book has turn into the 'bible' for airplane buildings.
Extra labored examples and difficulties. most recent fabrics in airplane development. Airframe quite a bit produced via manoeuvring.
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Extra resources for Aircraft Structures for Engineering Students (3rd Edition)
It follows that these basic equations are applicable to any type of continuous, deformable body no matter how complex its behaviour under stress. 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.
We may solve initially either for the three unknown displacements or for the six unknown stresses. In the former method the equilibrium equations are written in terms of strain by expressing the six stresses as functions of strain (see Problem P. 7). The strain-displacement relationships are then used to form three equations involving the three displacements u, v and w. The boundary conditions for this method of solution must be specified as displacements. 20); the six unknown stresses follow from the equations expressing stress as functions of strain.
The solution of problems in elasticity presents difficulties but the procedure may be simplified by the introduction of a stress function. For a particular two-dimensional case the stresses are related to a single function of x and y such that substitution for the stresses in terms of this function automatically satisfies the equations of equilibrium no matter what form the function may take. 5), plus the appropriate boundary conditions. For simplicity let us consider the two-dimensional case for which the body forces are zero.