Buckling
Buckling strength of hydraulic cylinders
The buckling strength of hydraulic cylinders is checked in a simplified manner using the calculation method according to Euler. Here, an admissible buckling load Fk is determined, which must not be exceeded by the force extending F1 of the cylinder.
The admissible buckling load Fk is calculated in a simplified manner from the piston rod diameter ds and the buckling length Lk. The buckling length Lk must be taken from the engineering drawing in accordance with the installation cases shown.
In addition, the mounting of the cylinder and the piston rod must be taken into account. For this purpose, the so-called "Euler installation case" and the resulting installation factor x are assigned to the possible installation cases shown.
Calculation formulas
| Area moment of inertia |  |
| Admissible buckling load |  |
| Formula symbol | ||
| ds | Piston rod diameter | [mm] |
| Fk | Admissible buckling load | [N] |
| J | Area moment of inertia | [mm4] |
| E | Modulus of elasticity | 210000 [N/mm2] |
| x | Installation factor | from table: buckling cases |
| S | Safety factor | 3 ... 5 |
Further calculation formulas for the design of hydraulic cylinders:
Calculation formulas for the design of hydraulic cylinders
Calculation of permissible oil speeds
Buckling cases calculation - Mountings of piston rod and cylinder
Calculation of the sine movement of hydraulic cylinders and oscillation cylinders