ASTM E132 (E-132) test method is used to determine Poissons constant of a material at room temperature. This test is limited to rectangular section test specimens. In a homogenous and isotropic solid the relationship between axial and lateral strain is linear for elastic strain. This test is used to determine how a structure will deform under a load, either tensile of compression. Taking load deformation into account is a necessary part of structural design, and having an accurate measurement of Poissons ratio is critical to the design process. ASTM E132 outlines the test procedure for uniaxial loading only.

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