Question

In order to increase the service life of the ABCD axis that is rotating under bending forces, from the previous problem, a material supplier proposes to you an AISI 1035 steel for the axis, with a machined surface finish and heat treated with a Sut = 110 kpsi. Knowing that the shaft has a diameter of 1.5 in.

Estimate:

1. DCL of the ABCD Axis

Answer 1

The estimated DCL of the ABCD axis made of AISI 1035 steel is 55 kpsi.

Step-by-step explanation:

To estimate the design life of the ABCD axis, we need to calculate the endurance limit, which is the maximum stress that the material can withstand for an infinite number of cycles without failure. The endurance limit (DCL) can be estimated using the following formula:

DCL = 0.5 * Sut

where Sut is the ultimate tensile strength of the material, given as 110 kpsi. Therefore, the estimated DCL for the AISI 1035 steel material is:

DCL = 0.5 * 110 kpsi = 55 kpsi