Strain (mechanics) - Wikipedia
网页In mechanics, strain is defined as relative deformation, compared to a reference position configuration. Different equivalent choices may be made for the expression of a strain field depending on whether it is defined with respect to the initial or the final configuration of the body and on whether the metric tensor or its dual is considered.
12.4: Stress, Strain, and Elastic Modulus (Part 1)
网页An object or medium under stress becomes deformed. The quantity that describes this deformation is called strain. Strain is given as a fractional change in either length (under tensile stress) or volume (under bulk stress) or geometry (under shear stress). Therefore, strain is a dimensionless number.
12.3 Stress, Strain, and Elastic Modulus - OpenStax
网页An object or medium under stress becomes deformed. The quantity that describes this deformation is called strain. Strain is given as a fractional change in either length (under tensile stress) or volume (under bulk stress) or geometry (under shear stress). Therefore, strain is a dimensionless number.
Mechanics of Materials: Strain - Boston University
网页Strain is a unitless measure of how much an object gets bigger or smaller from an applied load. Normal strain occurs when the elongation of an object is in response to a normal stress (i.e. perpendicular to a surface), and is denoted by the Greek letter epsilon. A positive value corresponds to a tensile strain, while negative is compressive.
Stress, Strain and Young's Modulus - The Engineering ToolBox
网页ε = strain - unit-less. E = Young's modulus (Modulus of Elasticity) (Pa, (N/m 2), psi (lb f /in 2)) Young's modulus can be used to predict the elongation or compression of an object when exposed to a force; Note that strain is a dimensionless unit since it is the ratio of two lengths.
Strain | IOPSpark - Institute of Physics
网页Tensile strain and compressive strain are usually represented by the symbol ε (the Greek letter epsilon). Tensile strain and compressive strain are defined, respectively, as the ratio of the extension, or compression, to the original undeformed length of a material:
12.5: Stress, Strain, and Elastic Modulus (Part 2)
网页The shear modulus is the proportionality constant in Equation \ref{12.33} and is defined by the ratio of stress to strain. Shear modulus is commonly denoted by \(S\): \[S = \frac{shear\; stress}{shear\; strain} = \frac{\frac{F_{\parallel}}{A}}{\frac{\Delta x}{L_{0}}} = \frac{F_{\parallel}}{A} \frac{L_{0}}{\Delta x} \ldotp \label{12.43}\]
Stress and Strain - SpringerLink
网页Strain can be defined as the ratio of the change in dimension of the material measured along a particular direction to its original dimension, it is therefore a dimensionless unit. The conventional symbols for stress are the Greek letters σ and τ and the symbols used for strain are ε and γ.
26.3: Shear Stress and Strain - Physics LibreTexts
网页2020年12月30日 · The shear stress is defined to be the ratio of the tangential force to the cross sectional area of the surface upon which it acts, σS = Ftan A. The shear strain is defined to be the ratio of the horizontal displacement to the height of the block, α = δx h.
Stress and Strain: Definition, Formula,Types in detail, [Notes
网页2021年3月25日 · Strain Definition: Strain is defined as the change in shape or size of a body due to deforming force applied on it. We can say that a body is strained due to stress. Strain Formula: Its symbol is (∈). Strain is measured by the ratio of change in dimension to the original dimension. i.e, Strain (∈) = Change in dimension / Original dimension