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A pull-off test, also called stud pull test, is a type of test in which an adhesive connection is made between a stud and a carrier (or object to be tested) by using a glue, possibly an epoxy or polyester resin, that is stronger than the bond that needs to be tested.
The aluminum stud pull-off test showed an increase from 31 N to about 200 N after either ammonia or hydrogen plasma treatment. XPS analysis of the plasma treated failure interface indicated cohesive failure between the modified layer and the bulk PTFE, similar to the chemically etched samples. [8]
2 Pull-off test. 3 Cross-cut Test. Toggle Cross-cut Test subsection. 3.1 ASTM D 3359 Test Method A. 3.2 ASTM D 3359 Test Method B. 4 See also. 5 Notes. Toggle the ...
During such a test, a solder ball down to 50 μm in diameter is reform it to the shape something like a mushroom and then pulled off the surface. Modern bond testers can perform a wide variety of tests with high precision, because automation eliminates human influence on the measurement.
Another popular test method for a cable harness is a 'pull test', in which the harness is attached to a machine that pulls the harness at a constant rate. This test then measures the cable harness' strength and electrical conductivity when pulled against a minimum standard to ensure that cable harnesses are consistently effective and safe. [10]
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USB Tweezers performing cold bump pull (CPB) on a bond tester. Measuring bond strength by pull testing is often the best way to get the failure mode in which you are interested. Additionally, and unlike a shear test, as the bond separates, the fracture surfaces are pulled away from each other, cleanly enabling accurate failure mode analysis.
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