Ansys Simulation for an IC engine

- December 28, 2019 at 3:30 pm
  
  avelynyinbibi
  Subscriber
  
  1. the result for the factor of safety is lower than 1 how should I improve it?
  
  2. Why there only show the stress distribution, and deformation for the piston and connection rod, but nothing for the crankshaft. Is it my setting setup wrongly? For the setup part, I had applied a 5Mpa pressure on the top of the piston and fixed support applied on the crankpin.
  
  3. Why is the connecting rod misalign to aside?
  
  4. is that the correct way or setup to simulate an ic engine?
  
  Here is the photo for the setup up part
  
  here is the picture show the misalignment of the connecting rod.
  
  For further information, here is the link for the file
  
  https://drive.google.com/file/d/1rGhVUUdH_L0SOW6QdPSvl5VyeOikWMWY/view?usp=sharing
- December 28, 2019 at 9:54 pm
  
  peteroznewman
  Subscriber
  
  1. You can increase the factor of safety by increasing the cross section of the material where the low factor of safety is or reducing the applied pressure.
  
  2. There is no stress on the crankshaft because you have a Fixed Support on the shaft going through the conrod. Move the fixed support to the ends of the crankshaft to see stress on that.
  
  3. The piston head is moving, not the conrod. The piston head is not constrained in a piston sleeve so it can move around.
  
  4. I recommend you study one part at a time. Attached is a model to study the conrod, which had the lowest factor of safety. Use a smaller element size to get a better quality stress result.
  
  Study the attached model, which replaces the Pressure of 5 MPa on an Area of 4941 mm^2 = Force of 24,710 N.
- December 30, 2019 at 5:46 pm
  
  avelynyinbibi
  Subscriber
  
  Thanks for your suggestion and help!