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rodsika
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what's the most illustration explanation or reason why a shear can pass from positive to negative in say a beam?
A shear can occur when two forces are applied in opposite directions parallel to each other, causing a deformation or distortion of the material.
Shear strength is the maximum amount of stress a material can withstand before it breaks or undergoes permanent deformation due to shear forces.
The factors that affect shear strength include the type of material, temperature, and the presence of defects or imperfections in the material's structure.
Shear strength is typically measured by conducting a shear test, where a sample of the material is subjected to shear forces until it breaks or deforms. The amount of force required to cause failure is then recorded as the shear strength.
Shear strength is important in various industries, such as construction, engineering, and manufacturing. It is used to determine the stability and strength of structures, as well as to design and test materials used in different products and components.