Deep C Frame Tension and Compression Tester



This is a simple foam Indentation Force Deflection (IFD) tester capable of testing samples up to 80” square and up to 8” thick. It uses a modified 8” stroke variable speed dc drive lead-screw assembly with an adjustable speed range to meet the requirements of ASTM D3574. (That spec allows the test to be done within a range of 0.83 to 3.3 mm/sec). A precision load sensor and digital display provide the IFD load values. Maximum load capability is 250 lbs. The custom fabricated structure (with the required lower venting grid) is powder coated steel and aluminum. Foam contact is made with a provided 8” diameter “indentor foot” on a pivoting couplinm. Foam contact is made with a provided 8” diameter “indentor foot” on a pivoting coupling. A three-position switch is provided, along with a speed controller, to allow the load to be slowly brought down onto the foam. The lead-screw will dynamically brake when releasing the switch at the correct position, (which is confirmed by reading a digital position sensor). Decays in the foam load against the indentation form can then be monitored using a simple stopwatch.g. A three-position switch is provided, along with a speed controller, to allow the load to be slowly brought down onto the foam. The lead-screw will dynamically brake when releasing the switch at the correct position, (which is confirmed by reading a digital position sensor).

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Specifications

 

 

ASTM D3574 

 

GMW 14359