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Shear Strength and Torsion Tests

 

 

Shear strength is defined as the maximum stress that a material can withstand before failure in shear. In a planar shear test, opposing forces are applied parallel to the cross-sectional area under test.

Torsion tests also provide an indication of shear properties. Torsion test evaluate materials or products under twisting loads or opposing radial forces according to ASTM E-143 or ISO equivalent standards. Data from torsion test is used to construct a stress-strain diagram and to determine elastic limit torsional modulus of elasticity, modulus of rupture in torsion, and torsional strength.

Calculation of shear strength depends upon the test method. For instance, the shear strength of a plastic is the maximum load required to shear a specimen in such a manner that the resulting pieces are completely clear of each other. Plastic shear strength is reported in psi based on the area of the sheared edge (ASTM D-732). Timber shear strength is determined by methods given in ASTM D-143 and ASTM D-198. ASTM E-299 defines the shear strength of a structural adhesive has the maximum shear stress in the adhesive prior to failure under torsional loading.

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Mechanical testing equipment covers devices used for adhesion, compression, drop (shock), tensile, vibration and fatigue testing. Search by Specification | Learn more about Mechanical Testing Equipment
Extensometers are used to indicate the deformation of material while it is subjected to stress. Learn more about Extensometers
Casting resins are pourable plastic or elastomer compounds used to cast parts, make molds or form a structure in place. Search by Specification | Learn more about Casting Resins
Rubber adhesives and sealants are highly flexible, natural or synthetic materials that are used to join components or fill gaps between seams or on surfaces. Search by Specification | Learn more about Rubber Adhesives and Sealants
Specialty polymers and resins are proprietary polymers, resins, monomers and intermediates. This category includes plastics and elastomers that are based on proprietary curing technologies or chemistries, or that are designed for specialized applications. Search by Specification | Learn more about Specialty Polymers and Resins
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Topics of Interest
7 SHEAR STRESS/STRAIN Shear, like compression, is a more important mode of deformation for engineering applications than tension. Nevertheless, tension remains the most common mode for laboratory... (Read More)
Modulus of Elasticity is the measurement of stiffness and rigidity of spring material, or its elastic ability. The higher the value (modulus), the stiffer the material. Conversely, materials with... (Read More)
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