Hydraulic Crush Press: Force, Pressure & Piston Area (2D)

Test Vehicle

Body structure

Hydraulic System

System pressure 24 MPa

Piston bore diameter 120 mm

Pump flow rate 40 L/min

Live Readout

Hydraulic force

0 kN

Ram speed

0 mm/s

Deformation

0 mm

Crush energy

0.0 kJ

Force capacity (P×A)

0 kN

Phase

Idle

How it works

A real crush press is governed by two hydraulic identities and one structural one. The cylinder converts fluid pressure into force over the piston's circular face, and converts pump flow into ram speed over that same face:

A  = pi*(d/2)^2            piston area from bore diameter d
F_max = P * A               force capacity (pressure x area)
v_ram = Q / A               ram speed (flow / area)

The vehicle body is modelled as a quasi-static elastic-plastic structure, the same idealisation used in real crush-test load-deflection curves: it resists elastically (force rises linearly with travel) up to a yield force, then crushes at roughly constant plastic force while the ram advances, then stiffens sharply once the structure bottoms out against its own mounts.

Force-limited stall — if the structure's resistance at the current depth exceeds F_max, the ram cannot advance further at this pressure; the force readout holds and the phase chip won't reach "Bottomed" until you raise the pressure or shrink the bore (which raises F_max at the same pressure).
Speed/force trade-off — a larger bore raises force capacity at a given pressure but slows the ram for the same pump flow (v = Q/A); a smaller bore does the reverse. Watch the ram-speed readout as you drag the bore slider.
Crush energy — the shaded area under the force-vs-displacement curve, integrated as force x distance while the ram advances; a stiffer/heavier vehicle absorbs more energy before bottoming out.

Ram / applied force Force-displacement curve Crush energy (area)