A hollow shaft transmits 15 MW at 400 rev / m * i * n . It is supposed that the maximum allowable stress is not to exceed 70 MN/m2 nor the angle per metre of twist 0.4 degree length of shafting. If the outside diameter of the shaft is 400 mm find the minimum thickness of the hollow shaft to satisfy the above conditions. G = 80 GN/m2. *

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Methods to Determine Vertical Stress

The load applied to the soil is transferred to the underground. The presence of water at soil pores and solid grains above the soil are the primary components that are responsible for the effective load transfer. Due to the load acting, the internal component of the soil or the underground formations undergoes deformations or a tectonic shift. The amount of deformation depends upon the amount of load acting on the soil surface, which indeed, depends on the weight of everything present above the soil. Due to this, the underground soil element develops internal stresses which try to resist the tectonic changes.