By Michael Clifford, Kathy Simmons, Philip Shipway
An creation to Mechanical Engineering is a necessary textual content for all first-year undergraduate scholars in addition to these learning for starting place levels and HNDs. The textual content supplies an intensive grounding within the following center engineering issues: thermodynamics, fluid mechanics, strong mechanics, dynamics, electricals and electronics, and fabrics technology. in addition to mechanical engineers, the textual content can be hugely correct to civil, car, aeronautical/aerospace and common engineering students.
The textual content is written by means of an skilled crew of first-year academics on the the world over well known collage of Nottingham.
The fabric during this e-book has complete scholar and lecturer aid on an accompanying site at
* labored examples of exam-style questions
* multiple-choice self-assessment
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Extra resources for An introduction to mechanical engineering. / Part 1
This is not the case for a rectangular section where IYY is different from IXX. 57. I-beams are common structural members, precisely because their sections have relatively high values for second moment of area. This is a consequence of a large portion of the crosssectional area being in the flange regions which are positioned a significant distance from the neutral axis resulting in a high I-value. 56), a high I-value reduces the stress level for a particular applied moment. e. 250mm reduced deformations under load.
49, and to simplify the analysis, we make a number of reasonable assumptions: (a) The beam is initially straight. e. the radius of curvature, R, is large. (c) Plane transverse sections remain plane after bending. 49, lines A1A2 and B1B2 remain straight. B2 (d) The beam material remains linear elastic during bending. g. shear stresses. 50(a) and (b) show part of a beam under (a) positive bending σ NA (sagging) and (b) negative bending (hogging). It is assumed that the beam is under pure bending (constant bending moment) in each case.
60, determine the position and magnitude of the maximum tensile bending stress. 61(a), which shows the beam’s simple supports replaced by point reaction forces, RA and RC. We will not consider the shear force any further in this example. 61(c). The bending moment rises from zero at the simple support, A, to a maximum at the load point, B. Here, x ϭ 2 and the maximum bending moment is Mmax ϭ 20 ϫ 2 ϭ 40 kNm. 61(c). In this case the bending moment again rises from zero at the simple support, C, to a maximum at the load point, B.