By Bruce Donaldson
As with the 1st version, this textbook presents a transparent advent to the elemental concept of structural research as utilized to automobiles, airplane, spacecraft, autos, and ships. The emphasis is at the program of primary thoughts of structural research in daily engineering perform. No assumptions are made with reference to the tactic of study. All approximations are observed by way of a whole rationalization in their validity. Repetition is a crucial studying software, and so a few redundancy appears to be like to dispel false impression. The variety of subject matters lined intimately is restricted to these crucial for contemporary structural engineering perform. during this new version, extra themes, figures, examples, and routines were further. a main switch has been a better emphasis at the finite point tools of research. 3 new chapters at the moment are incorporated, and readability continues to be the hallmark of this article
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Extra info for Analysis of Aircraft Structures: An Introduction
Example text
It is also true that a nonuniform stress distribution can exist over a cross-section of a bar made of only one material. Consider two square cross-section bars of cross-sectional area A which are made of the same material. Let the first of these two bars be loaded by a tensile force of magnitude 9000 lb, and the second by a tensile force of 1000 lb, where both forces are uniformly distributed over their respective cross-sections. 2. Illustration of the possibility of a nonuniform distribution of axial stresses across the cross-section of a bar.
To begin simply, a Cartesian coordinate system is first discussed. Hence, in this case, the infinitesimal areas are rectangles and the volume is a rectangular parallelepiped; see Fig. 6(a). The entire interior of the body up to, but not including, the boundary surface or surfaces (the skin of the potato) can be fashioned from such differential volumes. The Cartesian components of the stresses that act upon this differential volume are shown from two different viewpoints in Figs. 6(c). The stress vector magnitudes are, as adopted previously, average values for the stress over their respective differential areas.
A structural component assembly drawing, with most of the outer skin removed. Courtesy of the Beech Aircraft Corporation, Wichita, Kansas. 1 An Overview of Part I Vehicular weight, particularly that of aircraft and spacecraft, has a strong effect on the performance or economics of all such vehicles. Thus it is well worth spending many engineering man-hours on their design and analysis so as to make those vehicles as light-weight as possible. To make those many engineering hours of analysis as effective as possible, it is important that all the different types of loads that the vehicle will bear be well estimated, and then the structural response to those loads be carefully calculated.