Fixing device for carbon fiber composite beam in low-speed impact experiment

Abstract

The invention provides a fixing device for a carbon fiber composite beam in a low-speed impact experiment. The fixing device comprises a clamp base, a substrate, a sliding sleeve, a worm knob and a beam sample, wherein an inner groove is formed in the clamp base, the substrate is arranged in the inner groove of the clamp base, and the sliding sleeve comprises a sliding sleeve top plate, a sliding sleeve bottom plate, a first supporting column, a second supporting column, a third supporting column and a fourth supporting column. The sliding sleeve bottom plate is arranged in the substrate and fixedly connected with the first supporting column, the second supporting column, the third supporting column and the fourth supporting column. The other ends of the first supporting column, the second supporting column, the third supporting column and the fourth supporting column penetrate through the top of the substrate and are connected with the sliding sleeve top plate. The beam sample is arranged between the substrate and the sliding sleeve top plate; the device is simple in structure and easy to use, and can be used for fixing a special device of the carbon fiber beam so as to reduce errors of the carbon fiber beam caused by discomfort of the clamp.

Description

technical field [0001] The invention relates to the field of fixtures, in particular to a fixing device for a carbon fiber composite material beam in a low-speed impact test. Background technique [0002] Compared with traditional metal materials, carbon fiber composite materials have high specific strength, high specific stiffness, strong designability, and good fatigue resistance. They are widely used in aerospace, construction, transportation and other fields. Carbon fiber composites are often damaged by the impact of various foreign objects. In low-energy impacts, such as falling maintenance tools, hail, gravel, screws, tire fragments, and bird strikes on the runway during takeoff or landing, the depth of surface pits formed by such impacts is usually less than 0.5mm, which is difficult to see visually. It was found that, however, intralayer damage and delamination damage such as fiber compression, fiber fracture, matrix compression, and matrix cracking have occurred in...

AI Technical Summary

Problems solved by technology

In low-energy impacts, such as falling maintenance tools, hail, gravel, screws, tire fragments, and bird strikes on the runway during takeoff or landing, the depth of surface pits formed by such impacts is usually less than 0.5mm, which is difficult to see visually It was found that, however, intralayer damage and delamination damage such as fiber compression, fiber fracture, matrix compression, and matrix cracking have occurred inside the carbon fiber composite material, and the mechanical properties have declined significantly.

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