Fatigue testing device of honeycomb panel and testing method

Abstract

The invention relates to a fatigue testing device of a honeycomb panel and a testing method and belongs to the technical filed of performance testing of materials. The fatigue testing device of the honeycomb panel is characterized in that an air pressure operated nut locking trapezoid cross-section clamping fixture is mounted on a lower base of a fatigue testing machine through a vertical testing bracket; a test sample to be clamped is vertically clamped by the air pressure operated nut locking trapezoid cross-section clamping fixture; an eccentric wheel vibrator is arranged at the bottom end of the test sample to be clamped; the eccentric wheel vibrator is sequentially connected with an eccentric wheel and an external frequency converter; on/off operation of the external frequency converter is controlled by a motor; the lower part of the test sample to be clamped is respectively connected with a capacity strain gage and an electric eddy current precision displacement sensor. According to the testing method, fatigue life test results corresponding to different stress values are obtained, so that a life-stress curve line is created and the fatigue testing of the honeycomb panel is completed; a honeycomb panel clamp holder of the fatigue testing device has a trapezoid cross section, so that the honeycomb is prevented from being damaged; the test sample is vertically placed, so that the test sample is uniformly stressed; the testing method is convenient and feasible, and the accuracy of testing is ensured.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows for better protection against damage during tests on materials such as ceramics or other types of material without causing any harmful changes over time. It also includes various features like controlled oscillation amplitudes, improved sensitivity, automatic load/unload mechanisms with feedback loops, variable frequencies, precise position measurements, etc., all enabling more efficient use of energy resources compared to traditional methods.

Problems solved by technology

The technical problem addressed in this patented text relates to developing an effective way to measure the resistance against bending stresses when designing structures made from composites like those found in aircraft manufacturing. Current solutions involve either hydrostatic servo systems (HSS) or strain gauge machines which require special tools and equipment.

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