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Products | Theory of Machines and Properties of Materials | Stress and Strain Analysis | FL 120

FL 120

Round Diaphragm Apparatus

Technical Description

This handy table unit makes it possible to determine deflection and elongation in a clamped metal disc while subjecting it to varying pressure loads. The circular aluminium membrane is clamped at the edges. Measuring tapes for determining the elongation are attached to the disc at different radii. The signal is evaluated by the required accessory FL 151 (measuring amplifier). The adjustable position measurement gauge, which is mounted on a cross-member, can be used to measure the deflection at any radius. The pressure of max. 0.6bar is created in the maintenance-free hydraulic system with a hand pump and displayed on a manometer.

Learning Objectives / Experiments

· Measurement of disc elongation with a strain gauge
· Measurement of disc deflection with a dial gauge
· Determination of the radial tension
· Determination of the tangential tension
· Determination of the directions of principal stress

Features

· Deflection, radial and tangential tension profile
· Measurement of elongation with strain gauge

Available accessories

FL 151 -- Multi Channel Measuring Amplifier

Alternative products

FL 130 -- Thin Cylinder Apparatus
FL 140 -- Thick Cylinder Apparatus

Specification

[1] Tabletop experiment: deflection and tensile stress profile of a thin circular disc under constant pressure load
[2] Aluminium disc (AlMg3)
[3] Disc diameter Ø200mm, thickness 3mm
[4] Elongation measurement with 8 strain gauges
[5] Deflection gauge up to 20mm, 0.01mm
[6] l x w x h 700x350x350mm

Technical Data

Aluminium membrane (AlMg3)
Active membrane diameter: Ø200mm
Membrane thickness: 3mm
Position meas. gauge: up to 20mm, pitch 0.01mm
Measurement of elongation with 8 equally-spaced strain gauges

Dimensions and Weight

l x w x h : 700 x 350 x 350 mm
Weight : approx. 25 kg

Scope of Delivery

1 complete experimental apparatus, 1 experiment instructions

Order Details

021.12000 FL 120 Round Diaphragm Apparatus