Fr- spring radial load (N)
Radial stiffness of the F'r-spring (N/mm)
Fs- spring test load (N)
F- Spring deformation (mm)
Fj- deformation under working limit load Fj (mm)
Fr- spring static deformation (mm)
Fs- The amount of deformation of the spring under the test load Fs (mm); the amount of linear static deformation (mm)
Fo- tension spring corresponds to the assumed deformation amount (mm) of the tensile force Fo; the central deformation amount of the diaphragm (mm)
G-material shear modulus (MPa)
G- gravitational acceleration, g=9800mm/s2
H-spring working height (length) (mm)
Ho- spring free height (length (mm)
Hs- high (long) degree (mm) under spring test load
H- inner cone height of the disc spring (mm)
I- moment of inertia (mm4)
Ip- polar moment of inertia (mm4)
K-curvature coefficient; coefficient
Kt- temperature correction factor
Σ- normal stress (Mpa) when the spring is working
Σb- material tensile strength (Mpa)
Oj- material working ultimate stress (Mpa)
Σs- material tensile service point (Mpa)
Τ- Shear stress (Mpa) when the spring is working
k - coefficient
L- Spring material expansion length (mm)
I- Spring material effective working ring opening length (mm); leaf spring free chord length (mm)
M- bending moment (N: mm)