To understand the physics of the O-ring, we may need to start formulating the problem in a static equilibrium condition. For measured information below;
cylinder pressure, P= 500psi
Radius of gland, rg=.4105 in
Radius of piston rod, rp= .357in
O-ring diameter before squeezing, d= .1272 in
Contact length, Lc= .0382 in
O-ring material's Young's modulus, E= 3.625 ksi
Obtain these:
1. The seal thickness after squeezing, t
2. The seal squeeze (%)
3. The static forces: F1, F2, F3 and in the x1, x2 and x3 directions.