Why only cylinders shape were used to test Split Tensile Strength of Concrete?
Here, consider lens or mirror at the origin. Now, all the distances measured in the direction of incident rays are positive and distances measured in the direction opposite to the direction of incident rays are negative. All distances have to be measured from the lens or mirror. For example object dRead more
Here, consider lens or mirror at the origin. Now, all the distances measured in the direction of incident rays are positive and distances measured in the direction opposite to the direction of incident rays are negative. All distances have to be measured from the lens or mirror. For example object distance measured from lens or mirror is measured in the direction opposite to direction of incident rays hence, in these case object distance u is negative. The paraxial parallel rays are focused on the right hand side of convex lens. See, this distance f is measured in the direction of incident rays . Hence, focal length of convex lens is positive. But, we can see that focal length of concave mirror is negative. It’s radius of curvature is also negative. The radius of curvature of first surface of convex lens is positive, but radius of curvature of it’s second surface is negative. You can see that radius of curvature and focal length of concave mirror are negative.
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Tensile test is done on cylinder because only cylinders can be held under pure tension by applying a compressive load. That will only happen if it was under pure tension. If we take any other prismatic shape such as square cross section cylinder, the failure will be via compression but not tension.
Tensile test is done on cylinder because only cylinders can be held under pure tension by applying a compressive load. That will only happen if it was under pure tension. If we take any other prismatic shape such as square cross section cylinder, the failure will be via compression but not tension.
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