Shear strength in engineering is a term used to describe the strength of a material or component against the type of Yield (engineering) or structural failure where the material or component fails in Shearing (physics) In structural engineering 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 (wiktionary:e.g. beam (structure) Plate (structures) or Screw In a reinforced concrete beam, the main purpose of rebar is to increase the shear strength. For shear stress $\backslash tau$ applies :$\backslash tau\; \backslash frac\; \backslash sigma\_1\; -\; \backslash sigma\_2\}2\}\; ,$ where :$\backslash sigma\_1$ is major principal stress :$\backslash sigma\_2$ 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 sum of force and the force acting area, example-bolt shear strength: :$\backslash tau\; \backslash frac\; F\}A\}\; \backslash frac\; F\}\backslash pi\; r\_bolt\}^2\}\; \backslash frac\; 4F\}\backslash pi\; d\_bolt\}^2\}$ As a very rough guidehttp://www.roymech.co.uk/Useful_Tables/Matter/shear_tensile.htm: | class"wikitable" |- ! Material ! Ultimate Strength Relationship ! Yield Strength Relationship |- | Steels | USS approx. 0.75*UTS | von Mises yield criterion |- | Ductile Iron | USS approx. 0.9*UTS | SYS approx. 0.75*TYS |- | Malleable Iron | USS approx. 1.0*UTS | |- | Wrought Iron | USS approx. 0.83*UTS | |- | Cast Iron | USS approx. 1.3*UTS | |- | Aluminiums | USS approx. 0.65*UTS | SYS approx. 0.55*TYS |} USS: Ultimate Shear Strength, UTS: Ultimate Tensile Strength, SYS: Shear Yield Stress, TYS: Tensile Yield Stress

See also

* Shear modulus * Shear stress * Shear strain * Shear strength (soil) * Strength of materials * Tensile strength

References

Category:Mechanical engineering ar:مقاومة القص de:Scherfestigkeit es:Esfuerzo cortante nl:Schuifsterkte pt:Esforço cortante zh:剪切强度