Question

Define Strain and it's types.....
Give me full explanation.....

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Answer 1

to impair, injure, or weaken (a muscle, tendon, etc.) by stretching or overexertion. to cause mechanical deformation in (a body or structure) as the result of stress. to stretch beyond the proper point or limit: to strain the meaning of a word.

Answer 2

Answer:

Strain is the quantification of the deformation of a material. Linear strain occurs as a result of a change in the object's length. Linear strain is produced by compressive or tensile stresses. Shear strain occurs as a result of a change in the orientation of the object's molecules.

LINEAR STRAIN

When the loading of an object causes tensile or compressive stress within the object, some change in length accompanies this stress. This deformation can be measured in absolute terms that describe the change in length of the object as a result of the loading; for example, the rubber band stretched 10 cm or the intervertebral disc compressed 2 mm. The deformation may also be described in relative terms as a proportion of the change in length (the difference between the undeformed and the deformed lengths) divided by the original length (the undeformed length). This relative deformation measure is called linear strain.

Normal strain is a term that describes the response of a solid to the application of a normal force (i.e., a force that is perpendicular to the object's cross-sectional area). This property can be defined by the formula below:

ε = ΔL / L

Where:

ε = Normal strain

ΔL = Change in length

L = original length

Normal strain is sometimes referred to dimensional strain or just strain.

Volumetric strain connected with classical martensitic transformation, occurring during toughening of carbon steels, is on the order of 4% of what necessarily induces plastic slip strains in the parent phase.

Shear strain is the ratio of the change in deformation to its original length perpendicular to the axes of the member due to shear stress. Shear stress is stress in parallel to the cross section of the structural member.

From the definition of the shear strain, it is noted that shear strain is dependent on shear stress and the shear modulus (a constant property of the material from which the structural member is cast). Shear stress can occur in different loading conditions, such as lateral loading, axial loading, and bending, and hence, exert strain on the member.