stress concentration factor at the fillet of a shaft will be investigated

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

Each group will submit a SINGLE report of 4000±10% words with font size of Arial 11 point and appropriate margins and 1 line spacing. Layout Format: Academic style to CANVAS. References Style Harvard and Vancouver. There is no maximum number of images and diagrams.

Peer assessment is used for evaluating contribution of each individual in the group. Each group must complete the "Peer assessment: Group member's contribution" table at the end of this assignment brief. The table with group member's contribution should reflect the individual effort for the entire report (This Table is provided in this document).

This assignment worth 20% of the overall assessment for this module. Typical hours required by each student is 20 hours.

Section 1-Stress Concentration Factor Kt

In this part, the stress concentration factor at the fillet of a shaft will be investigated. Consider the stepped shaft in the figure below. The smaller diameter is d= 25mm and the bigger diameter is D= 50mm. The fillet radius is from r= 2.5 mm to 7.5mm. The shaft is made of steel with Young's modulus of 210 GPa and Poisson's ratio of 0.3. The total length of the shaft is 50mm. A torque of 1 kN.m is applied at the ends of shaft (see Figure 1).

Using ANSYS Workbench, calculate the following: (a) elastic stress concentration factor K, and (b) the effect of the fillet radius on the Kt for torsion and finally compare the results of SCF of FEA with theoretical values from Chart 1.

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