Creep Machine — MOE Lab Tender Details

Creep Machine

A self-contained bench mounting machine which demonstrates the phenomenon of creep under different conditions and in different materials

Experiments
The normal breaking load of a specimen over a fixed time
Relationship between breaking load and time for lead specimens
Time extension curves to show the three phases of creep (primary, secondary and tertiary)
The effect of temperature on the creep rate of specimens
Creep recovery

Specifications
Works with a Versatile Data Acquisition System  
To comprise of a lever and weight machine with a long lever arm and a bearing as a pivot point
The lever to have a mechanical advantage of 8:1
A digital displacement indicator to measure the extension of the specimen
A clear cylindrical enclosure is to surround the specimen area to maintain a constant temperature
Typical test times for lead specimens to be from 4 minutes to >18 hours at 20oC, depending upon the stress applied
To be supplied with:
Laboratory standard thermometer and thermocouple to measure the temperature effects of creep
Weight hanger
1x 100 g weight
2x 200 g weights
3x 500 g weights
A cool pack to reduce specimen temperatura
Specimens:
10x BS1178 lead specimens
Strain hardening coefficient n = 10
Activation energy for creep Q = 120 kJ/mol
10x polypropylene specimens
Young’s modulus = 1250 N/mm2
Time Exponent k = 0.1 to 0.2
Nett Dimensions and Weight: 570 mm x 430 mm x 220 mm, 7.5 kg + 5 kg weights