This text provides the student and professional mechanical engineer with a reference text of an essentially practical nature. It is uncluttered by text, and extensive use of illustrations and tables provide quick and clear access to information. It also includes examples of detailed calculations on many of the applications of technology used by mechanical and production engineers, draughtsmen and engineering designers. Although mainly intended for those studying and practising mechanical engineering, a glance at the contents will show that it is also useful to those in related branches of engineering such as production, marine, offshore, mining, mineral and in particular that of design. This reference book provides engineers with a wealth of useful material in a very compact and quickly accessible form.
Clear presentation and quick access to information
Engineering design involves the correct determination of the sizes of components to withstand the maximum stress due to combinations of direct, bending and shear loads. The following deals with the different types of stress and their combinations. Only the case of two-dimensional stress is dealt with, although many cases of three-dimensional stress combinations occur. The theory is applied to the special case of shafts under both torsion and bending.
1.1.1 Direct, shear and bending stress
Tensile and compressive stress (direct stresses)
Poissonâs ratio
Note: if eL is positive, eB is negative.
Shear stress
Note: A is parallel to the direction of P.
Bending stress
Bending stress
where:
M = bending moment
I = second moment of area of section
y = distance from centroid to the point considered
Maximum stress
where ym = maximum value of y for tensile and compressive stress.
