Structures or Why Things Don't Fall down

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Structures or Why Things Don't Fall down

Structures or Why Things Don't Fall down

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Overall, I highly, highly recommend this book to anyone interested in the rich history and design process of the structures of our daily lives. Much of what I write below is copied verbatim from the text, but am too lazy to identify what with appropriate quotes. In a book that Business Insider noted as one of the "14 Books that inspired Elon Musk," J.E. Gordon strips engineering of its confusing technical terms, communicating its founding principles in accessible, witty prose.

I detested the author's tone. To the author's credit, he wrote in what certainly seemed to be a sincere tone, so I suppose that I may just detest him. He writes in the manner of a charming, elderly British professor. Moreover, for a book about structures, this book is structured very poorly. There's no conclusion and each section of every chapter is a completely different subject without clear coherence or story.What are structures? A structure is a collection of materials intended to sustain loads. Structures occur in nature as well as in the man-made world. If however, by some miracle, the floor produced a larger thrust than my feet have called upon it to produce, say 201 pounds, then the result would be still more surprising because, of course, I should become airborne . the elasticity of the arteries therefore does the same job as the air-bottle affair which enegineers often attach to mechanical reciprocating pumps A structure has been defined as “an assemblage of material which is rent to sustain loads, and the study of structures one of the traditional branches of science. Structural Engineering formulas are giving all of you data about those recipes that are available in this book.

This book explains the engineering principles of mechanical structures to the public in an interesting approach that gives examples and case studies that are directly related to the human species experience in history and present. Although, the intent of such popular-engineering book is to simplify the engineering concept found in the field of mechanics of materials to the public, the author does not present the topic in a shallow manner. Besides the popular-engineering content that reflects the high exposure of the author to history, biology, mythology and literature ­­— the book is continuously injected with engineering mathematical equations with curves that show the stress/strain distribution or behavior with respect to another parameters. teh circumferential stress in the shell of a cylinder is rp/t, meaning it is 2x the longitudinal stress, which explains why sausage skins split longitudinally when they are cooked because the skin can't handle the circumfrential stress Creep, (sometimes called cold flow) is the tendency of a solid material to deform permanently under the influence of mechanical stresses, like tension or compression. If I weigh 200 pounds and stand on the floor y then the soles of my feet push downwards on the floor with a push or thrust of 200 pounds; that is the business of feet .or less mechanical forces without breaking, and so practically everything is a structure of one kind or another. In and “The New Science of Strong Materials and ” the author made plain the secrets of materials science. In this volume he explains the importance and properties of different structures. Structures Or Why Things Don’t Fall Down by James Edward Gordon – eBook Details

What can we do for crippled children? Why are sailing ships rigged in the way they are? Why did the bow of Odysseus have to be so hard to sing? the heart works in that during the pumping (systolic) part of the cardiac cycle, much of the excess of high -pressure blood is accomodated by the elastic expansion of the aorta and of the larger arteries; this has the effect of smoothing the fluctuations of our blood pressure. Gordon's old classic is very digestible with only the bare minimum for equations to cover all the concepts and is able to ingrate and contrast biological structures with man made materials for a source of biomimicry before it came to a larger conscious recognition and name (naming something usually give some power of it to dredge it from the subconscious hidden depths). So in that spirit of connecting similar patterns, I think this makes for a good abstract structure of social engineering:

Stress measures the force by which atoms and molecules within the material are being pushed apart, and it is measured as a function of force and area. In other words, stress is measured by dividing a force or pressure by the area it’s acting upon, aka newtons area. It is energetically advantageous for a weight to fall to the ground, for strain energy to be released -and so on. Sooner or later the weight will fall to the ground and the strain energy will be released; but it is the business of a structure to delay such events for a season, for a lifetime or for thousands of years. All structures will be broken or destroyed in the end -just as all people will die in the end. It is the purpose of medicine and engineering to postpone these occurrences for a decent interval." so if two droplets join up to make one droplet of twice the volume, there is a net reduction in the surface area of the liquid and therefore the surface energy. So there is an energy incentive for drops in an emulsion to coalesce and for the system to segregate into to continuous liquids. a lapped joint creates stress concentrations at the two ends of the joint, which is why the strength of such joints depends mostly on their width and not the length of overlap between the two parts. This makes simple rivets very effective



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