The invention discloses a digital fatigue
impact test instrument and a test method, comprising a guide rail, a guide rail support frame, a specimen fixture, an
impact hammer head, a light shield, an acceleration sensor, a
force sensor, a
photoelectric sensor, a cylinder control valve, a cylinder, and an
electromagnet , travel switch and computer. When the
impact hammer head descends from a height along the linear guide rail to impact the test specimen, the
data acquisition card records the experimental data of the impact process, and under the action of the cylinder and the
electromagnet, the
impact hammer head can rise to the set position to prepare for the next impact. The instrument can not only control the number of impacts and collect sensor data during the impact process, but also obtain the impact
contact force,
impact energy,
impact time, acceleration, displacement, and velocity in each impact process. The relationship between the changes in the physical quantities involved , to realize the
automation, continuous and full digitalization of the fatigue impact process, which is of great significance to the accurate
simulation, design and
failure mechanism exploration of the material
impact resistance process.