Fatigue fracture detection device, fatigue fracture detection method and program

摘要

This invention provides a fatigue fracture detection device, fatigue fracture detection method, and program that are for vibration testing and make it possible to effectively detect a fatigue fracture when a small crack is formed. A fatigue fracture detection device (1) according to this invention comprises: a pressure setting means for setting the pressure of a gas in a space to a prescribed pressure in a state where a fatigue fracture has not been formed in an object (50) under test; a pressure measurement means for measuring the pressure of the gas in the space while the object (50) under test is vibrated; a pressure evaluation means for evaluating whether reduction in the pressure measured by the pressure measurement means has exceeded a prescribed value; a time recording means for, if the pressure evaluation means evaluates that reduction in the pressure has exceeded the prescribed value, recording the time when the reduction in the pressure exceeded the prescribed value; and a vibration stopping means for stopping the vibration of the object (50) under test if the pressure evaluation means evaluates that reduction in the pressure has exceeded the prescribed value.