Week 9

Week 9

In week 9 the group faced a huge problem when they realized the 3D prints did not turn out the way they were supposed to based off the design. This is because they were designed too small. All week we tried to figure out ways to fix the problem but it wasn't until last minute that we found someone to 3D print our parts for us. 

Also in week 9, we worked on our presentation and updated our final report for the last lab.

The fluid dynamic software was also used to finish testing the valve. The results from these tests were good. We found out that the blood flow is central which is helpful to prevent coagulation. Other then last minute changes week 9 was just prep for the presentation.

Week 8

Week 8

In week 8, two weeks ahead from the Final Report, we were so busy to prepare for everything for the Presentation.

-         We submitted the 3D-printer with the scale that fits the Prototype.

-         We were discussing for the Presentation in week 10. Coming up with problems 

like: who is responsible for each parts, who will compose the PowerPoint and its design, how suite we should wear, and which questions will come up in the Q&A part at the end of the presentation.

-         Also, this week is the 2^nd Evaluation Assessment for group members. Undoubtedly, we have worked so well together, so we feel no problem with this part.

-         One more thing that very important for the Presentation, we have been doing the Analysis of the Stress and Strength of our Artificial Heart Valve design, as well as figure out the Blood Flow Rate go through the Man-made heart valves.  

Week 7

The groups final report draft was due this week so a lot of time and effort was put into making the final report optimal. The group afterwards realized they were confused on how to correctly cite the references used. To fix this issue time was spent to learn the proper IEEE citation format.

The group also waited for the 3-D printing parts to be printed out so they could be assembled. While they waited the group tried starting the presentation while downloading and learning how to use the CFX ANSYS effectively.

Week 7 was definitely a week here the group while waiting decided to outline how exactly we would finish up the final details of the project.

Week 6

During week 6, group 12 started to prepare for the end of the term. 

This week we finished the hinges on both the ring and the leaflets. Thankfully, our hinge design was successful and we were finally able to assemble the artificial valve. The model was sent to the 3D printer.

We also learned more about the Ansys CFX program that we will use to analyse the movement of blood through the valve.

Source:
http://www.ansys.com/staticassets/ANSYS/staticassets/resourcelibrary/brochure/fluid-dynamics-brochure.pdf

Finally, we started to work on our final presentation and report.

Week 5

During this week, we decided to redesign the hinges of our artificial heart valve. Hopefully, the tests that we will be performing on our valve design prove to us that we made the right decision. Currently we have worked on our 3D model using Creo Parametrics and are almost done with our 3D design.

New idea for design of hinge

Designing with CreoParametrics

"Ring" of the Artificial Heart Valve 

"Leaflet" of the Artificial Heart Valve 

Once we are finished, we will test the design using ANYS CFX (Computational Fluid Analysis) and then we will 3D print it. After having the prototype ready (which will be scaled 3 times the original size), we are planning to test it using PVC tubes and a fluid with a density similar to water.

Wish us good luck during this week!

Week 4

Working with Creo Parametric

This week, we spent time working with the project based on our timeline.

1       We researched and discussed to come up with the design for our tri-leaflet heart valve.

     We also met with each other outside the class to group-study for how to combine the mechanical tri-leaflet heart valves with the non-invasive surgery model. Here is what we figured out after research and discussion:

      

      

      It took a lot of time for us to figure out the best design. Finally, we decided to sketch it with Creo, then correct and improve it gradually. Before designing directly on Creo, we sketched our design on the following paper, such as: top, front and side-view of the overall project, as well as the detailed parts like hinges, like the following picture.

     

   

     Finally, based on the design we determined, as well as the dimensions that we researched and fitted to all our expected categories, we started applying Creo to sketch our project.

     We started with the most basic parts. First, we started drawing the ring, and then we drew the semi-circle of the tri-leaflet that will appear later.

 

Week 3

While still researching our group accomplished certain things this week.

1. We started a rough draft drawing of what we want our valve to look like.
2. We taught each other the research we individually found.
3. We also are trying to see if it is possible for us to edit our design to make it able to be inserted through a  non-invasive surgery.

The rough draft

-The design for our valve is a mechanical design. We also decided to use a 3 leaflet valve design because of it's advantages mentioned in the Week 2 - Research.

Source: http://roscardioinvest.ru/eng/index.php?id_subpart=5

-The group met outside of lab to discuss the next steps for the design process of the valve. A new sketch was drawn up to help visualize the valve before drawing it in Creo. Here is the two new pictures of the design.

-The first picture shows a more in depth idea of what we plan to draw up in Creo Parametric, while the second picture shows different designs for the possibility of inserting the valve without opening up the patients chest.