1. Hardness Test
... are applied to materials, they deform in reaction to those forces. The magnitude of the deformation for a constant force depends on the geometry of the materials. Likewise, the magnitude of the force required to cause a given deformation, depends on the geometry of the material. For these reasons, engineers define stress and strain. Stress (engineering definition) is given by: [1] Equation 1 o = F A0 Defined in ... by: [1] Equation 2 å = ∆l l0 The strain can be thought of as a normalized deformation. While the relationship between the force and deformation depends on the geometry of ...
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- Grade Level: High School