Product category:
Materials testing equipment
News Release from: Zwick Testing Machines | Subject: Foam fatigue test bench
Edited by the Engineeringtalk Editorial
Team on 30 March 2005
Bench provides range of foam testing
functions
Zwick has developed a test bench for the performance of dynamic fatigue tests on soft elastic foams.
Zwick has developed a test bench for the performance of dynamic fatigue tests on soft elastic foams The tests are carried out as per the relevant standards - for example, ISO 3385 and ASTM D 3574 - or in compliance with the specifications set by automobile manufacturers
This article was originally published on Engineeringtalk on 17 Jan 2003 at 8.00am (UK)
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Such tests encompass three parts in all.
First, the specimen thickness and the indentation hardness of the conditioned foam after a recovery time are determined.
Then the actual fatigue testing is performed: depending on the specification at hand, anywhere between 8,000 and 150,000 cycles may be run.
Finally, both the height and hardness losses are measured in a new test.
The test results yield information on the mechanical wear of the foam as might occur if used in car seats, for example, said Zwick.
The heart of the test bench is an electro-mechanical cylinder which, moving at a speed of up to 30-metres per minute, generates the necessary load.
A built-in force measurement feature, together with the Testcontrol control electronics, ensures that the prescribed force thresholds are strictly observed during testing.
Zwick claimed that the test bench can do more than perform the fatigue cycles.
Equipped with suitable compression platens or indentation stamps, the device is also said to be able to determine the indentation or crush hardness of specimens, thus offering the full range of functions of a testing machine. Request a free brochure from Zwick Testing Machines ...
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