Hi this is Lekha. Can somebody tell me how to do the ANSYS analysis for this assignment?
FEA Assignment s MECH71110 (Structural Analysis) Redent Tonna: [email protected]. uk Otis Wyatt: [email protected] General Information • This assessment consist s of two FEA reports equally weighted . • This is an individual piece of work . • You are required to upload both reports as a si ngle document via Turnitin on Blackboard. • The originality of your reports will be checked. Reports with greater than 25% similarity may be marked down or not marked at all. • Word count: 3000 words ( 1500 words per assignment ) • Hand in deadline: Tuesday 4th January 202 2, 11:59 pm ANSYS Assignment 1 (45 marks) Static S tructural Sim ula tion of a Rotary P um p usi ng ANS YS Wo rk benc h The problem A rotary pump feeds fluid to/from 6 pipes which are connected to flexible hoses ( Figure 1). The body of the pump is sand cast from aluminium alloy. The large front face of the body is fixed to another rigid part of the machinery via a ring of six bolts. Its maximum working pressure of 0.4 MPa acts on all internal faces of the pump (16 faces in total). Technical drawings are presented in Appendix 1 (all measurements are in mm). Figure 1 – Rotary Pump CAD model . Report Structure (45 marks) You are required to carry out a series of Finite Element Analyses using ANSYS Workbench to investigate the mechanical behaviour of the pump. In this context, y ou will need to prepare a report and submit it via Turnitin. In this report you will include clear description s of all the steps of the analyses that you have carried out during the pre -processing s tage and presentation and discussion of your result s (post -processing stage). More specifically, the report will be structured as follows: 1. Abstract (Include a summary of th e methodology you have followed, a clear and concise description on what are the aim and objectives of this assignment and how well you have achieved them. You should also include your main numerical findings and conclusions). (2 marks) 2. Create a CAD model of the rotary pump shown in Fig.1 using the supplied technical drawings in the Appendix 1 (all measurements are in mm). Y ou are free to use ANSYS Design Modeller or any CAD software . (3 marks) 3. Using ANSYS Workbench present your meshing model describing your meshing strategy . (4 marks) 4. Set the correct boundary conditions. Ensure you provide valid evidence to support any findings. (2 marks) 5. Evaluate equivalent stress and total deformation and comment on your results . (5 marks) 6. As this model is symmetrical in both shape and load, the computational time can be reduced and made more efficient. Run the analysis again using a symmetric model and compare the results with and without symmetry. Ensure you provide valid evidence to support any findings . (15 marks) 7. If the pressure increases to 3 MPa, is the pump made from aluminium alloy able to resist against it? Investigate using a Factor of Safety to solve which material could replace aluminium to overcome this problem. Use either the full model or the symmetric model to answer the question. Ensure you provide valid evidence to support any findings. (10 marks) 8. Ov erall Conclusion . (2 marks) 9. References (Provide reliable evidence to support all statements and interpretations using Harvard style in text citations linked to a correctly formatted reference list). (2 marks) ANSYS Assignment 2 (45 marks) Fatigue Simulation of a Road Section using ANSYS Workbench The problem Figure 2 shows a rectangular cut section of road situated on a standard beam bridge . The section itself is rigidly held above a support (pier) on one side, and the remaining sides are connected to other road segments that are held continuously. Throughout the day the road section is subjected to vehicular loads, applying an average weight of 1000kg on the section. The road is manufactured using concrete with an upper asphalt layer. Two steel bars are located internally, and the dimensions of these are shown in the Appendix 2. The S -N Curve for Structural Steel is given in Table 1. Figure 2 – Rectangular Road section. Table 1 – S-N Curve Table for Structural Steel. Report Structure ( 45 marks) You are required to carry out a series of Finite Element Analyses using ANSYS Workbench to investigate the behaviour of the road section, specifically the steel bars. In this context, you will need to prepare a report and submit it via Turnitin. In this re port you will include clear descriptions of all the steps of the analyses that you have carried out during the pre - processing stage and presentation and discussion of your results (post -processing stage). More specifically, the report should be structured as follows: 1. Abstract (Include a summary of the methodology you have followed, a clear and concise description on what are the aim and objectives of this assignment and how well you have achieved them. You should also include your main numerical findings an d conclusions). (2 marks) 2. Design the geometry of the road section shown in Fig.2 using the supplied technical drawings in the Appendix 2 (all measurements are in mm). You are free to use ANSYS Design Modeller or any CAD software. (4 marks) 3. Modify in ANSYS the material properties of Structural Steel to create the S -N curve using the data from Table 1. (3 marks) 4. Apply the boundary conditions to the model based on the information is given in the section “The Problem”. (4 marks) 5. Accurately calculate the maximum von Mises equivalent stress in the steel bars under the vehicular load specified. Demonstrate evidence of the steps you have followed to obtain thes e results and make appropriate discussions. (8 marks) Cycles Amplitude (Alternating) Stress (MPa) 1 83 10 72 100 61 1000 51 10000 42 100000 34 1000000 27 10000000 21 6. Using the data gathered to calculate the maximum von Mises equivalent stress, calculate analytically the endurance equivalent stress using Goodman fatigue criterion.Make sure you include in detail you r analytical calculations. Confirm your answer using the Fatigue Tool in ANSYS and discuss any discrepancies. (8 marks) 7. i) Use S -N curve in ANSYS to find the predicted life in cycles of the steel bar, based on Goodman stress theory. Confirm your answer using the Fatigue Tool in ANSYS and discuss any discrepancies. (7 marks) ii) If the load is fully reversed 30 times per minute, calculate analytically the life in hours, ensuring that all your related calculations are included in your ans wer. (5 marks) 8. Overall Conclusion. (2 marks) 9. References (Provide reliable evidence to support all statements and interpretations using Harvard style in text citations linked to a correctly formatted reference list). (2 marks) Report s layout and presentation ( 10 marks) • Both report s should include all the above sections (9 sections in each report) and with the order that appears above. • Answers should be typed, not handwritten, in a way that is logical and fluent to the reader. Calculat ions should be typed as well. • It is required to include cover page , list of contents, list of figures and list of tables (if any) • Phenomena observed should be analysed and written clearly and concisely using tables, graphs, equations, and figures to aid understanding. These should be correctly labelled and referenced. • You should provide adequate evidence to support your findings. Yo u are not required to upload any ANSYS files. Appendix 1 Appendix 2
