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Formability Test: Hydraulic Bulge Test

The test provides:

  1. Rapid biaxial stress-strain curve of sheet material
  2. Biaxial tensile strain limits of sheet material


Bulge Test Equipment

Interlaken Technology - Servo Press 150

Rapid Biaxial Stress-Strain Measurement

In hydraulic bulge test, sheet metals are deformed frictionless under oil pressure. The newly developed bulge analyzer software permits the online measurement of curvature and strain during deformation rapidly.

Machine vision metrology is ideally suited for the task of non-contact/non-intrusive strain measurement in a hydraulic bulge test. A compact system for measuring biaxial stress-strain curves consists of a CCD camera, image capture card, PC, custom software, and LED light source.