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In solid mechanics and structural engineering, section modulus is a geometric property of a given cross-section used in the design of beams or flexural members. Other geometric properties used in design include: area for tension and shear, radius of gyration for compression, and second moment of area and polar second moment of area for stiffness .
The attempts to provide precise expressions were made by many scientists, including Stephen Timoshenko, [12] Raymond D. Mindlin, [13] G. R. Cowper, [14] N. G. Stephen, [15] J. R. Hutchinson [16] etc. (see also the derivation of the Timoshenko beam theory as a refined beam theory based on the variational-asymptotic method in the book by Khanh C ...
Historically a beam is a squared timber, but may also be made of metal, stone, or a combination of wood and metal [1] such as a flitch beam.Beams primarily carry vertical gravitational forces, but they are also used to carry horizontal loads such as those due to earthquake or wind, or in tension to resist rafter thrust or compression (collar beam).
where , are the coordinates of a point on the cross section at which the stress is to be determined as shown to the right, and are the bending moments about the y and z centroid axes, and are the second moments of area (distinct from moments of inertia) about the y and z axes, and is the product of moments of area. Using this equation it is ...
The Euler–Bernoulli beam equation shows that the Ɪ-shaped section is a very efficient form for carrying both bending and shear loads in the plane of the web. On the other hand, the cross-section has a reduced capacity in the transverse direction, and is also inefficient in carrying torsion, for which hollow structural sections are often ...
Image credits: Is that Wired or Wonderful thing #3 Got This Great Lamp For My Reading Room At The Second Hand Store Grove Depot In Locust Grove Ga. I love it . Got it home and saw it had the name ...
Shen Kuo singled out, among other passages, a scene in which Yu Hao gives advice to another artisan-architect about slanting struts in order to brace a pagoda against the wind, and a passage in which Yu Hao describes the three sections of a building, the area above the crossbeams, the area above ground, and the foundation, and then proceeds to ...
Costco is closing the book on year-round sales of physical novels.. The bulk retailer is looking to end constant book sales at 500 of its 600 stores across the U.S., according to reports.Starting ...