FEA in Abaqus - paddle
FEA in Abaqus - paddle
(OP)
Hi.
I need to carry out analysis of stress of kayak paddle. I'm sure that applied force is not to high because I found information about this in many articles. I applied the boundary condition as is shown in below.



The stress in the shaft is about 350 MPa while it should be no higher than about 120 MPa. Can anybody help me ? I will be really helpful as this is my MSc project and deadline is coming and I have no more idea what BC should I apply to obtain lower stress.
I attach also files needed to run this model in abaqus
I need to carry out analysis of stress of kayak paddle. I'm sure that applied force is not to high because I found information about this in many articles. I applied the boundary condition as is shown in below.



The stress in the shaft is about 350 MPa while it should be no higher than about 120 MPa. Can anybody help me ? I will be really helpful as this is my MSc project and deadline is coming and I have no more idea what BC should I apply to obtain lower stress.
I attach also files needed to run this model in abaqus





RE: FEA in Abaqus - paddle
1. Why 3 surface tractions instead of a pressure load on the paddle blade?
2. The 3 boundary conditions also seem like a significant oversimplification. Can you model the actual pivot point with contact and apply boundary conditions to this hardware?
3. When I ran your model the shaft peak stress was closer to 800 MPa.
I hope this helps.
Thank you.
Rob Stupplebeen
OptimalDevice.com
My Personal WP
RE: FEA in Abaqus - paddle
2. Yes, my BC are simplified. I have no idea how to simulate better the real condition during rowing. Do you have any idea ?
3. Yes, that true. What is more this stress occur in place where BC are applied. That's why I think that my BC are incorrect.
RE: FEA in Abaqus - paddle
2. To start with I would look at modeling it similar to a 3 point bend test. The 2 hands would be 2 of the points and the third would be replaced with the XYZ load. Contact will need to be modeled with friction and possibly global stabilization or contact stabilization.
3. The 2 hands could initially be modeled as rigid cylinders however you may want to evolve this towards industry tests or reality with hands.
I hope this helps.
Rob Stupplebeen
OptimalDevice.com
My LinkedIn
RE: FEA in Abaqus - paddle