Composite aircraft fuselage section pressurizing test method

Abstract

The invention relates to a composite aircraft fuselage section pressurizing test method comprising the following steps: preparing a test piece, wherein the test piece includes a composite aircraft fuselage section and metal test fixtures, the composite aircraft fuselage section further includes a composite skin, a composite frame and a metal connector, and the metal test fixtures are held at the two ends of the composite aircraft fuselage section; arranging a strain acquisition device and a displacement acquisition device on the test piece to acquire the strain and displacement of the composite aircraft fuselage section; and after filling the inside of and sealing the composite aircraft fuselage section, conducting pressure test. The composite aircraft fuselage section pressurizing test method of the invention is accurate in measurement, and can provide reference for fuselage section pressurizing test of domestic large civil aircrafts and new regional aircrafts so as to improve the technological level and maturity of composite materials used in domestic civil aircraft structures.

Description

technical field [0001] The invention belongs to the technical field of aircraft design, and in particular relates to a composite material aircraft fuselage section pressure charging test method. Background technique [0002] As we all know, in aircraft design, composite materials are more and more widely used in aircraft structures due to their excellent properties such as high specific stiffness / specific strength, corrosion resistance, and fatigue resistance. Composite materials can effectively reduce the weight of the aircraft structure and increase the commercial load of the aircraft; or increase the amount of fuel and increase the range of the aircraft. On the other hand, the application of composite materials can reduce the number of aircraft structural inspections, increase inspection intervals, and reduce aircraft maintenance costs, thereby fundamentally improving the economic benefits of civil aircraft throughout their service life. [0003] For foreign advanced civ...

AI Technical Summary

Problems solved by technology

[0004] More than 90% of the aircraft structures currently in service in China are aluminum alloys, and the amount of composite materials is very small, and they are all used in the secondary load-bearing s

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