Slow-Motion Pictures of Impact Tests by Means of Photoelasticity

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Abstract
The experiments described in this paper were carried out in investigating the distribution of stresses and their variation with time in a test bar subject to bending stresses resulting from an impact. While a series of tests has been made, only two of them will be dealt with in detail. In the first test the impact is of moderate intensity, so that the response is entirely elastic. The test results will be compared with a theoretical treatise by St. Venant and Flamant published in 1889. In the second test the impact is strong enough to break the test bar.

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