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Asymmetric fuselage bulkhead four-point bending testing method and device

A four-point bending and test method technology, which is applied to ground devices, aircraft parts, transportation and packaging, etc., can solve the problem of inaccurate failure modes of the test data set of test pieces, and achieve the effect of high loading accuracy and simple implementation

Active Publication Date: 2016-12-21
CHINA AIRPLANT STRENGTH RES INST
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Problems solved by technology

The eccentric moment will be transmitted to the testing machine through the fixture, causing the chuck of the testing machine to bend, and with the increase of the ballast, the moment will also become larger and diverge, which may cause the failure mode of the test piece test data set to be different. precise

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  • Asymmetric fuselage bulkhead four-point bending testing method and device
  • Asymmetric fuselage bulkhead four-point bending testing method and device

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Embodiment Construction

[0017] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below ...

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Abstract

The invention discloses an asymmetric fuselage bulkhead four-point bending testing method and device. The asymmetric fuselage bulkhead four-point bending testing method includes the following steps that 1, a test block is additionally arranged on a to-be-tested asymmetric fuselage bulkhead; 2, one loading head assembly is additionally arranged on each of two opposite loading platforms of a test loading device, the loading head assemblies can adapt to bending deformation of the fuselage bulkhead, and it is always kept that loading force is vertical to the straight section of the bulkhead (the same below); 3, the to-be-tested asymmetric fuselage bulkhead is arranged between the two loading head assemblies, and a four-point bending test is carried out. According to the asymmetric fuselage bulkhead four-point bending testing method, the loading pressure center of the asymmetric fuselage bulkhead in a loading test is bent through the cross section of the asymmetric fuselage bulkhead, bending deformation of the asymmetric fuselage bulkhead is adjusted in the mode that the loading head assemblies deform in the force carrying process in the loading process, and the purpose of measuring the asymmetric eccentric structure is achieved.

Description

technical field [0001] The invention relates to the technical field of aircraft structure static / fatigue tests, in particular to a four-point bending test method for an asymmetric fuselage frame and a four-point bending test device for an asymmetric fuselage frame. Background technique [0002] In the static / fatigue test of the aircraft structure, the test piece subjected to four-point bending is usually a symmetrical structure. Since the cross-sectional shape of the fuselage frame loaded is an asymmetrical eccentric structure, an eccentric moment will be generated when the ballast is directly applied on the testing machine , causing the attitude of the test piece to tilt. The eccentric moment will be transmitted to the testing machine through the fixture, causing the chuck of the testing machine to bend, and with the increase of the ballast, the moment will also become larger and diverge, which may cause the failure mode of the test piece test data set to be different. pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64F5/00
Inventor 张洋洋邓凡臣柴亚南李新祥
Owner CHINA AIRPLANT STRENGTH RES INST
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