Multifunction flexible composite material impact test apparatus

Abstract

The invention discloses a falling multifunctional measuring device for an impact test of soft composite materials, comprising an impact test unit. The device is also provided with a transient force and displacement testing unit which comprises a sensor supporting sleeve, a piezoelectric force sensor, a grating bar, a photoelectric sensor, a stabilized voltage supply, a charge amplifier and a signal amplifier. The testing unit can be arranged in the impact test unit in a detachable way; the piezoelectric force transducer is positioned in the sensor supporting sleeve, and the input end thereof is connected with the charge amplifier; the sensor supporting sleeve is arranged at the upper end of a hammer head; the grating bar and the sensor supporting sleeve are positioned at the same horizontal line; the grating bar can move synchronously with the hammer head and a base thereof is provided with the photoelectric sensor; the photoelectric sensor is positioned below the grating bar and the excitation voltage thereof is provided by the stabilized voltage supply; and the signal output end of the photoelectric sensor is connected with the signal amplifier. The device has simple structure, high integration level and low cost, and can provide testing data of composite materials in a small energy test.

Description

technical field [0001] The invention belongs to an impact test device, in particular to a multifunctional flexible composite material impact test device. Background technique [0002] The impact resistance of equipment, structures or materials that may be exposed to impact environments or may be abused is very important to many industries, so it is of great significance to study the changes in the properties of materials after impact. For now, the research on the impact response of materials can be divided into two categories: high-speed impact and low-velocity impact. Low-velocity impact test methods mainly include pendulum impact test, drop weight impact test and tensile impact test. The drop hammer tester can realistically simulate the impact of common debris and falling objects, and better measure the third-dimensional impact resistance of materials; moreover, the shape, size, boundary conditions, and impact velocity of the impact head can be flexibly according to the r...

AI Technical Summary

Problems solved by technology

The drop hammer tester can realistically simulate the impact of common debris and falling objects, and better measure the third-dimensional impact resistance of materials; moreover, the shape, size, boundary conditions, and impact velocity of the impact head can be flexibly according to the requirements of the experimental design. Changes, the currently widely used drop-weight tester is mainly for the strength test of non-metallic and metal products such as plastics, glass, ceramics, etc. So far, there is no test equipment for small-energy testing of flexible composite materials

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