Shear strength 2260942 209793666 2008-05-02T22:36:56Z Noclevername 1546209 text link '''Shear strength''' in [[engineering]] is a term used to [[describe]] the strength of a material or component against the type of [[Yield (engineering)|yield]] or [[structural failure]] where the material or component fails in [[Shearing (physics)|shear]]. In [[structural engineering|structural]] and [[mechanical engineering]] the shear strength of a component is important for designing the dimensions and materials to be used for the manufacture/construction of the component. For example, [[beam (structure)|beams]], plates, bolts etc. In a [[reinforced concrete]] beam, the main purpose of [[rebar|stirrups]] is to increase the shear strength. For [[shear stress]] <math>\tau</math> applies :<math>\tau = \frac {\sigma_1 - \sigma_2}{2} ,</math> where :<math>\sigma_1</math> is major principal stress :<math>\sigma_2</math> is minor principal stress In general: ductile materials fail in shear (ex. aluminum), whereas brittle materials (ex. cast iron) fail in tension. See [[tensile strength]]. To calculate: Given failing force and area, example-bolt shear strength: :<math>\tau = \frac {F}{A} = \frac {F}{\pi r_{bolt}^2} = \frac {4F}{\pi d_{bolt}^2}</math> ==See also== * [[Shear modulus]] * [[Shear stress]] * [[Shear strain]] * [[Shear strength (soil)]] {{engineering-stub}} {{Unreferenced|date=December 2007}} [[Category:Mechanical engineering]] [[ar:مقاومة القص]] [[de:Scherfestigkeit]] [[nl:Schuifsterkte]] [[vi:Độ bền cắt]]