DETERMINING IMPACT VELOCITY IN AN IMPACT TESTER USING A MATHEMATICAL MODEL

Testing on impact test hammer is one of the methods to evaluate the impact of impulses, accelerations, and stress waves on the details and parts of the test object in order to evaluate the operation or durability of the test object for research and testing. Those impacts depend on many factors such as the weight of the hammer, the weight of the test object, the hardness of the anvil, the angle of lifting the hammer, etc. The parameters of the hammer are only applicable to the default cases, other cases when necessary to determine velocity must be measured. The calculation method is suggested by this article to determine impact velocity so that it can be applied on all cases instead of having to measure many times. The calculation results are verified by experimentally measuring the hammer velocity on high-speed camera with an error not exceeding 3.42%.