A Manual of Applied MechanicsC. Griffin and Company, Limited, 1904 - 680 Seiten |
Inhalt
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Andere Ausgaben - Alle anzeigen
Häufige Begriffe und Wortgruppen
acting actual energy angle angle of repose angular momentum angular velocity applied Article axes axis of rotation beam centre of gravity centre of resistance co-efficient co-ordinates components conjugate cord cos² couple cross section curvature curve cylinder denote deviation diameter direction distance elasticity equal and opposite equation expressed figure fixed flexure fluid formula friction girder given horizontal inertia instant instantaneous axis intensity joint length line of action load mass moment of inertia motion oblique oscillation P₁ pair perpendicular piece pitch surfaces plane position pressure principles prism proportional r₁ radius radius of curvature radius of gyration ratio rectangular relatively represent resultant rigid body screw shearing stress solid spandril square inch stability straight line strain strength teeth tension thrust tion transverse traversing uniform velocity-ratio vertical weight wheel Λ Λ Λ
Beliebte Passagen
Seite 443 - Teeth, that is, their projection beyond the pitch circle, is found by considering, that for one of the wheels in fig. 198, such as the wheel 1, the real radius, or radius of the addendum circle, is the hypothenuse of a right-angled triangle, of which one side is the radius of the base circle CP, and the other is PI + the portion of the path of contact beyond I.
Seite 15 - Force is an action between two bodies, either causing or tending to cause change in their relative rest or motion.
Seite 5 - The mathematician can easily demonstrate that a certain power, applied by means of a certain lever or of a certain system of pulleys, will suffice to raise a certain weight. But his demonstration proceeds on the supposition that the machinery is such as no load will bend or break. If the engineer, who has to lift a great mass of real granite by the instrumentality of real timber and real hemp, should absolutely rely on the...
Seite 5 - If the engineer who has to lift a great mass of real granite by the instrumentality of real timber and real hemp, should absolutely rely on the propositions which he finds in treatises on dynamics, and should make no allowance for the imperfection of his materials, his whole apparatus of beams, wheels, and ropes would soon come down in ruin, and, with all his geometrical skill, he Would be found a far inferior builder to those painted barbarians who, though they never heard of the parallelogram of...
Seite 274 - ... cases by a stress perfectly consistent with safety. The determination of proof strength by experiment is now, therefore, a matter of some obscurity ; but it may be considered that the best test known is, the not producing an INCREASING SET by repeated application.
Seite 209 - Friction is that force which acts between two bodies at their surface of contact so as to resist their sliding on each other, and which depends on the force with which the bodies are pressed together.
Seite 88 - The above demonstration shows that a shear upon a given plane cannot exist alone as a solitary or simple stress, but must be combined with a shear of equal intensity on a different plane. The tendency of the action of the pair of shearing stresses represented in the figure on the prism ABCD is obviously to distort it, by lengthening the diagonal DB, and shortening the diagonal AC, so as to sharpen the angles D and B, and flatten the angles A and C. 104.
Seite 273 - ... undergoing great alterations of figure, and whose elasticity of figure is very imperfect, is a plastic solid. The gradations are insensible between plastic solids and viscous liquids, in which there is a resistance to change of figure, but no tendency to recover any...
Seite 190 - Arch is a linear arch suited for sustaining normal pressure at each point proportional, like that of a liquid in repose, to the depth below a given horizontal plane ; and is sometimes called " the arch of Yvon- Villarceaux...
Seite 514 - ... into the square of the distance of its centre of gravity from the axis...