Aviation aluminum alloy component residual stress detecting and evaluating system and method

Abstract

Disclosed are an aviation aluminum alloy component residual stress detecting and evaluating system and method. The system comprises a signal generator, a power amplifier, a probe, a modulator circuit, a filtering amplifier, a data collecting card and a computer which are sequentially connected. The probe comprises a cross-shaped flexible excitation coil which is bonded with a plastic base with an angle dial, a first solid-state magnetic field sensor, a second solid-state magnetic field sensor, a third solid-state magnetic field sensor and a fourth solid-state magnetic field sensor are fixed in four cross-shaped arms of the cross-shaped flexible excitation coil respectively, a center locating point O of the cross-shaped flexible excitation coil is completely overlapped with the center of the plastic base with the angle dial, the direction of the connecting line of the first solid-state magnetic field sensor and the third solid-state magnetic field sensor is completely overlapped with the horizontal direction, and the direction of the connecting line of the second solid-state magnetic field sensor and the fourth solid-state magnetic field sensor is completely overlapped with the longitudinal direction. The invention further discloses the detecting and evaluation method corresponding to the system. Thus, quantitative and directional detecting can be conducted on the residual stress of aviation aluminum alloy components.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing, and in particular relates to a residual stress detection and evaluation system and method for aviation aluminum alloy components. Background technique [0002] At present, aviation aluminum alloy components are widely used in aircraft, aerospace / aircraft structures, and the material of the components is aviation aluminum alloy. The advantage of aviation aluminum alloy is that it has high specific strength and specific stiffness, which can reduce the structural weight of the aircraft, improve flight performance and increase economic benefits. In addition, aviation aluminum alloy also has good machinability, which is beneficial to the manufacture of aviation parts. Aeronautical aluminum alloys are widely used in skins, beams, ribs, stringers, bulkheads, wheels and landing gear in aircraft structures. [0003] Aeronautical aluminum alloy components are prone to residual stress duri...

AI Technical Summary

Problems solved by technology

[0003] Aeronautical aluminum alloy components are prone to residual stress during processing and use. The existence of residual stress reduces the service life of aviation aluminum alloy components and affects aircraft safety.

At present, in addition to the destructive measurement of the residual stress of aviation aluminum alloy components, in terms of non-destructive testing, residual stress measurement methods based on single-frequency / multi-frequency eddy current testing and pulsed eddy current testing are mostly used. Disadvantages of Determination of Residual Stress Direction of Alloy Components

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