ENGR 364 course project
SFSU
Objective
Project Title: Structural Analysis of a Bracket with a Hole
1) To better understand the physical concepts introduced in ENGR 364, materials, and manufacturing
processes by providing three-dimensional (3D) visualization of bending stresses in a cantilevered
beam.
2) To get hands-on experience with existing tools to find solutions to engineering problems related to
mechanical design when analytical solutions might be difficult to obtain.
3) To provide opportunities for students to improve oral and written communication skills through
teamwork experience, report writing, and presentations.
Project description
In this project, students will work in a team to design a bracket to hold a personalized coffee mug and learn
to use Matlab to perform stress and strain analysis on the bracket. A parametric study will be performed to
analyze the performance of various materials for the bracket. Additionally, students will practice choosing
the best material for a pre-defined design criteria, by providing analysis and justifications based on the
simulation results for stress and deflection analysis. The project is worth 20% of students' overall credit in
ENGR 364.
Project Tasks
1) Install Matlab R2023b using this link. If you don't have a computer or prefer not to use your own
personal computer, you can borrow one from the SFSU library.
2) Using any CAD software of your choice, design a 3D bracket similar to the one provided to you
(BracketWithHole.stl) with specified dimensions to hold a personalized coffee mug. Name the new
design bracket [group number].stl, e.g. bracket_1.stl.
3) Copy the Matlab file provided to you and the two *.STL files into a subdirectory on your computer.
4) Run the Matlab code using the BracketWithHole.stl file to practice getting some of the following
results. Then run the Matlab code on your designed bracket called bracket_[group number].stl and make
sure the code works before you continue to do the analysis in the following steps.
5) Carefully do the following steps to collect output figures and information requested and include them
in your final report.
a. Using hand calculations, identify the critical section in the bracket. Estimate maximum bending
stresses in the crucial section.
b. Using Table A-5, select 3 to 4 materials with various Young's modulus and Poisson's ratio.
Run the Matlab code for each material. Create a table; then report the max Von Misses Stress
and Max deflection in each direction for different materials along with their E and v. Discuss
how these two parameters affect the results.
C.
Set design criteria based on a maximum deflection for the bracket in one or all three directions
when holding a full mug. Based on your analysis in (b), what material will give you the
minimum deflection? Discuss your answer.
d. Set design criteria based on the minimum weight for the bracket + full mug. What would be
the best material for your design? Discuss your response.
Fatemeh Khalkhal, PhD
1
2024 © ENGR 364 course project
e.
SFSU
As one of the output parameters, calculate n, the factor of safety using DE theory, i.e., n = Yield
Strength /Von Mises Stress. Plot the color map of the factor of safety and discuss why you
observe a distribution of n. For your best design, what is the value of n at the critical point (the
most vulnerable point in your entire structure)?
f. Find out the maximum weight of a full mug the bracket can hold without exceeding a maximum
deflection of 0.1 mm.
Project Deliverables:
1) Technical report in PDF format; maximum 10 pages (excluding the cover page and references, if
any). The report must be submitted by the due date to be considered for full credit. Please proofread
before submission.
2) Include the project title, semester, course name and number on the cover page, and the team
members' names.
3) Also, briefly mention the role of each team member, at the beginning of at the end of the report.
4) In your report, include a clear schematic of your designed bracket with specified dimensions.
Submit the CAD file used for your analysis in *.STL format.
5) Use a combination of tables, graphs, and plots to demonstrate your results. Discuss and analyze the
presented results in your report.
6) Proofread the final report; make sure it is well written and clear in details.
7) Submit the final report in PDF format.
Project Grading Rubric
1) Clarity of the demonstrations, tables and graphics (20%)
2) Results analysis and discussion (20%)
3) Quality of writing, grammatical correctness, writing structure (20%)
4) Completeness of the report (steps a to f) and correctness of the analysis (30%)
5) Final presentation (10%)
2
Fatemeh Khalkhal, PhD
2024 ©/n just need all calculation And graphs in report
make sure to follow all requirements in the report
need all calcuation, hand calculation part and enter all values in the table
MATLAB is fine i already created the desing on solid work
don't need any discussion or introduction writing parts, just use files i
upload and figure out all calculation need to be done
