Elastic Resistance
Mechanical resistance parameters quantify the force required to deflect a flexible metallic barrier across its working displacement range. Measured in newtons per millimetre, corrugated membrane stiffness defines the linear elastic spring rate of concentric ridge profiles formed into thin sensing diaphragms. Concentric corrugations lower the effective spring constant compared to flat discs, extending linear stroke under hydraulic loading.
The parameter governs pressure-to-deflection conversion efficiency inside sealed differential pressure capsules. Baseline elastic properties remain constant within the small-deflection regime of the base alloy.
Profile Geometry
Formed corrugation depth and pitch determine the axial compliance of the isolating seal. Deep circumferential waves distribute bending stresses uniformly across the active diameter, reducing peak localized strains. During manufacturing, hydroforming or mechanical stamping sets the convolution profile within tight dimensional tolerances.
Shallow corrugations increase overall stiffness, shifting the sensor resonant frequency higher while reducing displacement sensitivity. Variations in sheet thickness directly scale the resulting spring rate according to cubic power laws.
Hysteresis Shift
Work hardening under repeated pressure cycling causes non-linear baseline changes in the sensing cell. When corrugated membrane stiffness varies due to cold-work strain hardening, zero-point stability degrades over operational lifecycles. Metallurgical heat treatment restores uniform grain structures, stabilizing the compliance profile against pressure spikes.
Operating Boundary
Beyond the proportional limit of the sheet material, localized plastic deformation permanently alters the spring rate. Excessive line pressure forces convolutions past their yield threshold, causing permanent offset shifts in connected transducers. Mechanical stops limit maximum travel to protect the convoluted profile from destructive overpressure events.
