By David W. A. Rees
In an international weather the place engineers are more and more stressed to utilize constrained assets, there are large capability monetary and environmental advantages to be won through designing for minimal weight. With Mechanics of optimum Structural Design, David Rees brings the unique process of weight optimization to the present structural layout literature, offering a technique for achieving minimal weight of a variety of buildings less than their operating a lot. He addresses the present hole in schooling among formal structural layout instructing at undergraduate point and the sensible program of this information in undefined, describing the analytical options that scholars have to comprehend earlier than utilising computational thoughts that may be effortless to misuse with out this grounding.
- Shows engineers the right way to procedure structural layout for minimal weight in transparent, concise phrases
- Contains many new least-weight layout suggestions, taking into account various manners of loading and together with new issues that experience now not formerly been thought of in the least-weight subject
- Considers the calls for for least-weight highway, air and area cars for the longer term
- Enhanced through illustrative labored examples to enlighten the speculation, routines on the finish of every bankruptcy that permit software of the idea coated, and an accompanying site with labored examples and ideas housed at www.wiley.com/go/rees
The least-weight analyses of simple structural components be sure a range of curiosity with many purposes in mechanical, civil, plane and motor vehicle engineering. hence, this ebook fills the distance among the elemental fabric taught at undergraduate point and different techniques to optimal layout, for instance machine simulations and the finite point method. Content:
Chapter 1 Compression of narrow Struts (pages 1–27):
Chapter 2 Compression of extensive Struts (pages 29–63):
Chapter three Bending of narrow Beams (pages 65–90):
Chapter four Torsion of Bars and Tubes (pages 91–133):
Chapter five Shear of good Bars, Tubes and skinny Sections (pages 135–172):
Chapter 6 mixed Shear and Torsion in Thin?Walled Sections (pages 173–191):
Chapter 7 mixed Shear and Bending in Idealised Sections (pages 193–221):
Chapter eight Shear in Stiffened Webs (pages 223–237):
Chapter nine body Assemblies (pages 239–264):
Chapter 10 easily Supported Beams and Cantilevers (pages 265–323):
Chapter eleven optimal Cross?Sections for Beams (pages 325–356):
Chapter 12 buildings below mixed Loading (pages 357–402):
Chapter thirteen Encastre Beams (pages 403–464):
Chapter 14 Plastic cave in of Beams and Frames (pages 465–509):
Chapter 15 Dynamic Programming (pages 511–520):
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Additional resources for Mechanics of Optimal Structural Design: Minimum Weight Structures
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78) are made equal. 66a,b) for θ = 90◦ .
3 for regular polygons with seven sides and more. 5 Thin-Walled, Open Sections The objective function is again R = σ/ρ but more cross-sectional dimensions will require optimisation within the straight limbs of an open section. ), it is necessary to: (i) ensure that flexural buckling occurs about its two principal axes simultaneously and (ii) establish whether the flange or web is less resistant to local buckling. There follows the usual procedure of ensuring that critical stresses by the governing criteria are attained simultaneously.
4 A long, aluminium-alloy strut (E = 70 GPa), with a uniformly square, tubular cross-section and pinned ends, is required to bear a compressive load of 10 kN in a 2 m length. e. minimise the section area). Show this graphically in a plot of the objective function against cross-section areas ranging from 100 mm2 to 350 mm2 in steps of 50 mm2 . 5 mm. 5 Investigate the optimum design condition for a strut with an unequal angle section where tb /b < ta /a, such that local buckling occurs only in the longer limb.