The failure of any structure starts at a point when stresses exceed the strength of the materials.
It simply means that we need to refine our definition of stress on a surface to stress at a point.
stresses may vary from point to point in a body.
But there arise two difficulties when we analyse stress at a point?
An infinite number of imaginary planes can pass through a point and
For analyses, we need to shrink the area of the imaginary surface to zero.
Which imaginary surface do we shrink to zero?
And when we shrink the surface area to zero, which stress formula should we use?
Normal stress formula or shear stress formula?
In this booster, you will learn how to solve both of the difficulties.