torsion

(tôr'shən)
n.

1. 1. The act of twisting or turning.
   2. The condition of being twisted or turned.
2. The stress or deformation caused when one end of an object is twisted in one direction and the other end is held motionless or twisted in the opposite direction.

[Middle English torcion, wringing pain in the bowels, from Old French torsion, from Late Latin torsiō, torsiōn-, a wringing pain, variant of Latin tortiō, from tortus, past particple of torquēre, to twist. See torsade.]

torsional tor'sion·al adj.
torsionally tor'sion·al·ly adv.

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A straining action produced by couples that act normal to the axis of a member. Torsion is identified by a twisting deformation.

In practice, torsion is often accompanied by bending or axial thrust as in the case of line shafting driving gears or pulleys, or propeller shafts for ship propulsion. Other important examples include springs and machine mechanisms usually having circular sections, either solid or tubular. Members with noncircular sections are of interest in special applications, such as structural members subjected to unsymmetrical bending loads that twist and buckle beams. See also Spring (machines); Torsion bar.

When subjected only to torque, the member is in pure torsion, which produces pure shear stresses. The shear properties of materials are determined by a torsion test. See also Shear; Torque.

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The twisting of a structural member about its longitudinal axis by two equal and opposite torques, one at one end and the other at the opposite end.

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A mechanical strain set up in an object when the object is twisted around its longitudinal axis, typically when one end is fixed. The external twisting forces are resisted by the shear stresses induced in the material of the object.

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1. the twisting of something about an axis by the application of equal and opposite rotational forces acting in parallel planes.
2. the twist so produced.

—torsional adj.

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1. the act of twisting, e.g. of an artery in hemostasis.
2. the state of being twisted. For specific torsions see abomasal, cecal, colonic, gastric, liver, mesenteric, splenic, testicular, uterine.

n

In dentistry the twisting of a tooth on its long axis. Also, the loading of a wire by twisting it along its long axis.

See words rhyming with "torsion."

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Dansk (Danish)
n. - snoning, vridning

Nederlands (Dutch)
torsie

Français (French)
n. - torsion

Deutsch (German)
n. - Drehung, Torsion

Ελληνική (Greek)
n. - στρέψη ή συστροφή

Italiano (Italian)
torsione

Português (Portuguese)
n. - torção (m)

Русский (Russian)
скрученность скручивание, сопротивление скручиванию

Español (Spanish)
n. - torsión

Svenska (Swedish)
n. - vridning, torsion

中文（简体）(Chinese (Simplified))
扭转, 扭力, 扭曲

中文（繁體）(Chinese (Traditional))
n. - 扭轉, 扭力, 扭曲

한국어 (Korean)
n. - 비트는 힘, 비틀림

日本語 (Japanese)
n. - ねじること, ねじれ

العربيه (Arabic)
‏(الاسم) أنفتال, ألتواء, فتل, لي‏

עברית (Hebrew)
n. - ‮פיתול הגוף, עיקום, מידת העקמומיות של עקומה (מתמטיקה), עקמומיות החילזון (ביולוגיה)‬

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