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. 2020 Oct 8;13(19):4458. doi: 10.3390/ma13194458
a length of micro-cavity in axial direction b length of micro-cavity in circumferential direction
C10, C01, d Mooney–Rivlin coefficients Drod rod diameter
E equivalent Young’s modulus Eseal Young’s modulus of the seal
F cavitation factor Fsum sum of the pressure differences
h film thickness h0 initial film thickness
hp depth of the micro-cavity hr rod surface height
hT average truncated film thickness hw wear depth
Δh micro deformation of the sealing lip surface H hardness
I1, I2 deviatoric strain invariants J parameter relating to the elastic deformation gradient
k wear modulus K wear coefficient
L side length of texture Lx length of the simulation space in axial direction
Ly length of the simulation space in circumferential direction p static contact pressure
pa ambient pressure pc asperity contact pressure
pcav cavitation pressure pf fluid pressure
pn normal contact pressure ps sealed pressure
Δp pressure difference p¯c averge asperity contact pressure
rc radius of circular micro-cavity rs wear distance rate
rt wear time rate R asperity radius of the seal
S relative sliding distance u rod speed
V material wear volume W normal load
W˜ strain energy density x coordinate in x-axis direction
y coordinate in y-axis direction η asperity density of the seal
γ ratio of the axial length of micro-cavity to the circumferential length μ fluid viscosity
μ0 fluid viscosity under the ambient pressure σ seal surface roughness
σs equivalent standard deviation of surface roughness ϕx, ϕy pressure flow factors
ϕs.c.x shear flow factor Φ fluid pressure or density of the cavitation region
υseal Poisson’s ratio of the seal