Diamante pull-off test

Case study

Diamante pull-off test with UltraTest

Diamante pull-off test equipment

Solution

Motorised tensile test stand and gauge
clamping fixture and slotted gripping accessory

Benefits

Approved product quality testing to customer specification
Simple and reliable test procedure
Test To Failure (TTF) condition detected and captured automatically
Confidence in meeting safety standards

Requirement

The customer was a supplier to major UK clothing retailer Marks & Spencer, who stipulate that all fasteners and attachments must be tested to failure.

The strength of the joint/diamante was critical to ensure that it met the design tolerance and safety levels. A motorised unit with a test speed was defined at 200 mm/min as the system needed to be simple to use in a production environment and provide consistent results.

Solution

The cloth material was clamped in a 'Double Action Vice Grip' with 50 mm wide faces coated with non-slip rubber to enhance the gripping strength. The diamante attachment was loaded from the front into a slotted claw fixture, ready for testing.

For ease of loading the diamante into the fixture and also to help maintain a straight-pull, the 'Diamante Fixture' was connected to the force gauge via a flexible chain link. The peak tension load to remove/break the diamante was recorded at the fast data-acquisition speed of 1200 Hz.