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Encyclopedia > Tensile stress

Tensile stress (or tension) is the stress state leading to expansion; that is, the length of a material tends to increase in the tensile direction. The volume of the material stays constant. Therefore in a uniaxial material the length increases in the tensile stress direction and the other two directions will decrease in size (see Poisson's ratio for detail). In the uniaxial manner of tension, tensile stress is induced by pulling forces across a bar, specimen, etc. Tensile stress is the opposite of compressive stress. Tension is a reaction force applied by a stretched string (rope or a similar object) on the objects which stretch it. ... Figure 1  Stress tensor In physics, stress is a measure of the internal distribution of force per unit area within a body that balances and reacts to the loads applied to it. ... When a sample of material is stretched in one direction, it tends to get thinner in the other two directions. ... Tension is a reaction force applied by a stretched string (rope or a similar object) on the objects which stretch it. ... Compressive stress is the stress applied to materials resulting in their compaction (decrease of volume). ...

Structural members in direct tension are ropes, soil anchors and nails, bolts, etc. Beams subjected to bending moments may include tensile stress as well as compressive stress and/or shear stress. Coils of rope used for long-line fishing A rope (IPA: ) is a length of fibers, twisted or braided together to improve strength for pulling and connecting. ... Soil is material capable of supporting plant life. ... A ships or boats anchor is used to attach the vessel to the bottom at a specific point. ... A pile of nails Nails This article is about nails as used in engineering. ... Screws come in a variety of shapes and sizes for different purposes. ... A statically determinate beam, bending under an evenly distributed load. ... In physics, the moment of force (often just moment, though there are other quantities of that name such as moment of inertia) is a quantity that represents the magnitude of force applied to a rotational system at a distance from the axis of rotation. ... Shear stress is a stress state where the shape of a material tends to change (usually by sliding forces -- torque by transversely-acting forces) without particular volume change. ...

Tensile stress may be increased until the reach of tensile strength, namely the limit state of stress. It has been suggested that this article or section be merged into Strength of materials. ...

The formula for tensile stress is:

Tensile Stress = Force / Cross-sectional Area

Units for Tensile Stress are N/m²

See also

  Results from FactBites:
Stress and Strain (0 words)
Stress is a value which describes the amount of load carried by each unit of cross sectional area of a component.
The stress that the 10,500 pound load applies to the shaft is defined as the load divided by the cross-sectional area of the shaft, which is 10,500 pounds ÷ 0.200 square inches = 52,500 pounds per square inch (psi).
Then shear stress applied to the bolt would be 20,000 pounds divided by twice the bolt area (because the load is shared by two different cross-sectional areas of the bolt), or 22,634 psi.
Stress Concentration (0 words)
These flaws cause the stress surrounding the flaw to be amplified where the magnification is dependent upon the orientation and geometry of the flaw.
Stress raisers are defined as the flaws having the ability to amplify an applied stress in the locale.
The stress concentration factor is a simple measure of the degree to which an external stress is amplified at the tip of a small crack.
  More results at FactBites »



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