Answer Happy

1. Calculate the distribution of experimental stresses on the plate based on your measured strains (use Young's Modulus E = 215 GPa and Poisson's ratio of 0.3). The tensile yield stress of the material is 240 MPa. 2. Calculate the experimental stress concentration factor (Kexp) for each gauge location. 3. Calculate the theoretical tangential stress (09_th) for each gauge location. 4. Calculate theoretical stress concentration factor (Kth) for each gauge location. 5. Conduct a finite element (FE) analysis of the plate to calculate FE stresses: a. You will need to draw your plate in CAD and then run an FE analysis of the plate loaded in tension. b. Create a colour map plot of your FE plate stresses - over the entire plate. c. Extract the FE stresses that match the location of your strain gauges (09_FE) - these will be used to compare with your experimental and theoretical results. d. Calculate FE stress concentration factor (Kth_FE) for each gauge location. Results 6. Tabulate your results. Be sure to indicate the magnitude of the applied load that your group used. 7. On the same graph, plot experimental, theoretical and FE stress concentration factors as a function of normalised distance (r/a) from centre of hole. Be sure to label your graph axes appropriately and legibly. Discussion and Conclusion 8. Summarise your results and their context. 9. Discuss the level of agreement between your experimental, theoretical and FE results. 10. Discuss the assumptions and possible limitations of the experiment. 11. Recommend any alternative experimental methods to improve the results. 12. Discuss the effect that changing from a circular hole to an elliptical hole would have on the maximum tangential stress at the edges of the hole. Assume the elliptical hole has dimensions of b = 2a, where b represents the half-width of the major axis. 13. Write a brief conclusion that brings your key findings together.