A bench top mounted unit for studying the stress and strain in a thin walled cylinder under internal pressures. A pressure relief valve on the hand pump is factory set and tested. The main component of this bench top unit is a thin-walled aluminum cylinder. It is sealed on one side with a piston which can be repositioned with a hand wheel. This makes it possible to create either the dual-axis stress state of a sealed container or the single-axis stress state of a tube.
The cylinder is filled with oil and is sealed. The internal pressure is generated with a hand activated hydraulic pump and displayed on an easy-to-read pressure gauge. Five strain gauges are attached around the perimeter at angles of 0o, 30o, 45o, 60o and 90o to the cylinder axis to measure deformation. The unit is used in conjunction with the measuring amplifier.