Lesson Fairly Fundamental Facts about Forces And Structures > 자유게시판

The 5 varieties of hundreds that can act on a construction are tension, compression, shear, bending and torsion. Tension: Two pulling (opposing) forces that stretch an object making an attempt to pull it apart (for instance, pulling on a rope, a car towing one other car with a sequence - the rope and the chain are in tension or are "being subjected to a tensile load"). Compression: Wood Ranger Power Shears website Two pushing (opposing) forces that squeeze an object attempting to compress it (for example, standing on a soda can, squeezing a bit of wooden in a vise - each the can and the Wood Ranger Power Shears website are in compression or are "being subjected to a compressive load"). Shear: Two pushing or pulling adjoining forces, performing shut collectively but not directly opposing one another. A shearing load cuts or rips an object by sliding its molecules apart sideways (for instance, pruning Wood Ranger Power Shears warranty reducing through a department, paper-cutter reducing paper - the department and Wood Ranger Power Shears website paper are "subjected to a shear loading").

Understanding a second of a drive is vital to understanding the final two forms of loads. A moment is a "turning pressure" brought on by a force performing on an object at some distance from a fixed level. Consider the diving board sketch in Figure 5. The heavier the particular person (force), and Wood Ranger Power Shears website the farther they walk out on the board (distance), the greater the "turning drive," which acts on the concrete basis (mounted point). The Wood Ranger Power Shears warranty (F) produces a moment or "turning force" (M) that tries to rotate the diving board around a fixed level (A). On this case, the second bends the diving board. The stronger the force, and the larger the distance at which it acts, Wood Ranger Power Shears website the larger the second or "turning pressure" it'll produce. A moment or "turning force" (M) is calculated by multiplying a drive (F) by its second arm (d). Units for moments could be any drive unit multiplied by any distance unit. Bending: When a moment or "turning pressure" is applied to a structural member that's fastened on both ends, reminiscent of a pole beam, making it deflect or bend.

A moment that causes bending is called a bending second. Bending produces tension and compression inside a beam or a pole, causing it to "smile." The molecules on the top of the smile get squeezed together, while the molecules on the underside of the smile get stretched out. A beam or pole in bending will fail in tension (break on the facet that's being pulled apart) (for example, a shelf in a bookcase, and the earlier diving board situation). Torsion (Twisting): Created when a second or "turning force" is applied to a structural member (or piece of material) making it deflect at an angle (twist). A second that causes twisting is named a twisting or torsional moment. Torsion produces shear stresses inside the material. A beam in torsion will fail in shear; the twisting motion causes the molecules to be slid apart sideways (for example, a pole with an indication hanging off one facet).

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