What is meant by compression?
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Answer:
In mechanics, compression is the application of balanced inward ("pushing") forces to different points on a material or structure, that is, forces with no net sum or torque directed so as to reduce its size in one or more directions.[1] It is contrasted with tension or traction, the application of balanced outward ("pulling") forces; and with shearing forces, directed so as to displace layers of the material parallel to each other. The compressive strength of materials and structures is an important engineering consideration.In uniaxial compression, the forces are directed along one direction only, so that they act towards decreasing the object's length along that direction.[2] The compressive forces may also be applied in multiple directions; for example inwards along the edges of a plate or all over the side surface of a cylinder, so as to reduce its area (biaxial compression), or inwards over the entire surface of a body, so as to reduce its volume.
Technically, a material is under a state of compression, at some specific point and along a specific direction {\displaystyle x}x, if the normal component of the stress vector across a surface with normal direction {\displaystyle x}x is directed opposite to {\displaystyle x}x. If the stress vector itself is opposite to {\displaystyle x}x, the material is said to be under normal compression or pure compressive stress along {\displaystyle x}x. In a solid, the amount of compression generally depends on the direction {\displaystyle x}x, and the material may be under compression along some directions but under traction along others. If the stress vector is purely compressive and has the same magnitude for all directions, the material is said to be under isotropic or hydrostatic compression at that point. This is the only type of static compression that liquids and gases can bear.[3]
In a mechanical longitudinal wave, or compression wave, the medium is displaced in the wave's direction, resulting in areas of compression and rarefaction.
MEANING OF COMPRESSION IN DIFFERENT SUBJECTS
Compression, decrease in volume of any object or substance resulting from applied stress. Compression may be undergone by solids, liquids, and gases and by living systems.
A compression is a region in a longitudinal wave where the particles are closest together. ... The region where the medium is compressed is known as a compression and the region where the medium is spread out is known as a rarefaction.
Data compression is a reduction in the number of bits needed to represent data. Compressing data can save storage capacity, speed up file transfer, and decrease costs for storage hardware and network bandwidth.
Compression, or "data compression," is used to reduce the size of one or more files. When a file is compressed, it takes up less disk space than an uncompressed version and can be transferred to other systems more quickly.
In uniaxial compression, the forces are directed along one direction only, so that they act towards decreasing the object's length along that direction.[2] The compressive forces may also be applied in multiple directions; for example inwards along the edges of a plate or all over the side surface of a cylinder, so as to reduce its area (biaxial compression), or inwards over the entire surface of a body, so as to reduce its volume.
Technically, a material is under a state of compression, at some specific point and along a specific direction {\displaystyle x}x, if the normal component of the stress vector across a surface with normal direction {\displaystyle x}x is directed opposite to {\displaystyle x}x. If the stress vector itself is opposite to {\displaystyle x}x, the material is said to be under normal compression or pure compressive stress along {\displaystyle x}x. In a solid, the amount of compression generally depends on the direction {\displaystyle x}x, and the material may be under compression along some directions but under traction along others. If the stress vector is purely compressive and has the same magnitude for all directions, the material is said to be under isotropic or hydrostatic compression at that point. This is the only type of static compression that liquids and gases can bear.In a mechanical longitudinal wave, or compression wave, the medium is displaced in the wave's direction, resulting in areas of compression and rarefaction.In mechanics, compression is the application of balanced inward ("pushing") forces to different points on a material or structure, that is, forces with no net sum or torque directed so as to reduce its size in one or more directions.[1] It is contrasted with tension or traction, the application of balanced outward ("pulling") forces; and with shearing forces, directed so as to displace layers of the material parallel to each other. The compressive strength of materials and structures is an important engineering consideration.
Compression is a term that describes a force within a structural system that squeezes down , across or even up, on another structural member or immobile component . ... Compression is also used in construction to stabilize various substrates such as gravel, to provide a strong and compacted base material.