Digital fatigue impact test instrument and test method

Abstract

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.

Description

technical field [0001] The invention belongs to the field of vibration and impact, and in particular relates to a digital fatigue impact test instrument and a test method. Background technique [0002] In real life, we often encounter some impact phenomena, such as birds and aircraft in the sky, high-speed vehicles and obstacles on the ground, ships and hidden reefs on the water, and so on. Most of the equipment or components will behave differently after being impacted, some cause major safety accidents and cause heavy losses; The reason for such a result is not only related to the specific environment of impact and collision, but also related to the design structure of equipment or parts. How to design the structure of parts to minimize the loss of equipment or parts after impact? Before establishing relevant design theory and design methods, engineers and technicians must do a large number of experiments to explore the damage mechanism of impact damage and study the chan...

AI Technical Summary

Problems solved by technology

The pneumatic ejection impact testing machine mainly relies on the mechanical energy provided by the pneumatic mechanism to convert into kinetic energy to achieve impact. The common feature of these instruments is that they can only roughly obtain the experimental data of a single impact process. If you want to truly and accurately understand the impact process, To establish relevant impact-resistant design theories and design methods, and to study the damage mechanism of structures, it is necessary to have an experimental instrument that can more accurately describe the fatigue impact process.

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