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Standard Charpy calibration specimens designed for verification of pendulum impact machines have been tested on a vertical drop tower impact machine. Two different test techniques (optical velocity measurement and integrated digital load-time response) for measuring the fracture energy of these specimens have produced equivalent sets of data which match the range of expected pendulum machine results. The more flexible vertical drop tower machine can therefore be used to measure Charpy impact energies with the same reliability as the conventional pendulum machines.
President, Fracture Control Corp., Goleta, Calif.
PresidentMember of ASTM, GHI Systems, Rancho Palos Verdes, Calif
Stock #: JTE11558J