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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.
Fiber pull-out is one of the failure mechanisms in fiber-reinforced composite materials. [1] Other forms of failure include delamination , intralaminar matrix cracking, longitudinal matrix splitting, fiber/matrix debonding, and fiber fracture. [ 1 ]
In the paint and coating industries, paint adhesion testing is often used to determine if the paint or coating will adhere properly to the substrates to which they are applied. Several tests measure the resistance of paints and coatings from substrates: cross-cut test, scrape adhesion, pull-off test , and others.
To perform this test flat indentation tips, usually made of diamond or tungsten, are used. These tips are mechanically lowered onto the location of the fiber on the composite using a CCD This test is not to be confused with fiber pull-out, which is a composite crack propagation phenomenon. The mechanics behind the test are as follows: 1 ...
Tensile testing, also known as tension testing, [1] is a fundamental materials science and engineering test in which a sample is subjected to a controlled tension until failure. Properties that are directly measured via a tensile test are ultimate tensile strength , breaking strength , maximum elongation and reduction in area. [ 2 ]
Testing of coupons can also be carried out inside environmental chambers where the temperature, humidity and environment that may affect the rate of crack growth can be controlled. Because of the size and unique shape of full size test articles, special test rigs are built to apply loads through a series of hydraulic or electric actuators.
As of version 6.0, the Squish GUI Tester fully integrates support for behavior-driven development (BDD) and testing extended by special functionality to apply this to GUI tests. Squish is compatible with the Gherkin (domain-specific language) used in tools such as Cucumber. [citation needed] Squish is shipped with the full source code. [4]
Load-pull is the colloquial term applied to the process of systematically varying the impedance presented to a device under test (DUT), most often a transistor, to assess its performance and the associated conditions to deliver that performance in a network. [1]