Manufacturing Industry
Dynamic fatigue tester for soft elastic foams.(KEEPING UP WITH: Auxiliaries)
Plastics Technology, February, 2006
A new test bench is designed for dynamic fatigue testing of flexible foams according to ISO 3385 and ASTM D 3574 standards or other specifications of automobile OEMs. Available from Zwick USA, Kennesaw, Ga., the system uses an electromechanical cylinder moving at a speed of up to 98.4 ft/min to generate the prescribed load, controlled by built-in force measurement.
The tests involve three phases. First, the specimen thickness and indentation hardness of the conditioned foam after a recovery time are measured. This is followed by fatigue testing for 8000 to 15,000 cycles, depending on the test specification. Finally, the change in foam height and indentation hardness are measured. This device can also be used to determine the indentation or crush hardness of...
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