In the Charpy impact test, how is the specimen held?

In the Charpy impact test, the specimen is held at both ends and struck in the middle. This setup is essential to accurately measure the material's toughness and energy absorption capabilities when subjected to an impact load. By securing the specimen at both ends, the middle section can freely deflect upon impact, allowing for a clear assessment of the material's response to stress.

This configuration also ensures that the energy absorbed during the fracture can be directly related to the properties of the material being tested. If the specimen were held differently or without support, the results could be influenced by varying degrees of constraint, thereby affecting the accuracy and reproducibility of the test results. Holding the specimen in this manner provides a consistent standard for evaluating materials used in engineering applications.