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Fiber metal laminate fatigue delamination extension test gap processing method

A technology of fiber metal laminates and extended testing, which is applied to metal processing equipment, manufacturing tools, grinding machines, etc., can solve the problems of prepreg fracture, no description, prepreg damage, etc., and achieve the effect of simple installation

Active Publication Date: 2015-05-27
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Abstract
  • Description
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Problems solved by technology

[0003] The pre-crack notch of the metal material test piece is generally processed by wire cutting, while for the fatigue layer expansion test piece of fiber metal laminate, the distance between the tip of the notch and the prepreg is less than 0.5mm, and the heat generated by wire cutting is easy to make the prepreg Damage occurs, and the prepreg is prone to fracture under fatigue loading, which cannot guarantee the smooth progress of the fatigue delamination test
In order to solve the problem of notch processing of the center crack sample of fiber-metal hybrid laminates, China Aviation Industry Corporation Beijing Aeronautical Materials Research Institute has carried out research in this area, explored and developed related processing methods, and through the investigation and retrieval of domestic patent documents, no see the description of the

Method used

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  • Fiber metal laminate fatigue delamination extension test gap processing method
  • Fiber metal laminate fatigue delamination extension test gap processing method
  • Fiber metal laminate fatigue delamination extension test gap processing method

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0018] See attached Figure 1~4 As shown, in the processing method of the notch of the fatigue delamination expansion test of the fiber metal laminate, the fiber metal laminate is formed by the prepreg layer 2 impregnated with the adhesive and the metal aluminum plate 1 after overlapping and paving The laminated board 6 formed by the curing process, the fatigue delamination expansion test notch is a strip-shaped notch 3 processed on the metal aluminum plate 1 of the laminated board 6, the cross-section of the strip-shaped notch 3 is V-shaped, V-shaped The radius of curvature of the tip should be less than or equal to 0.1±0.03mm, and the distance D between the V-shaped tip and the prepreg layer 2 is less than or equal to 0.5mm. The steps of the method are:

[0019] Step 1: Clamp the laminated plate 6 on the shoulder surface of the mold 7 with ...

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Abstract

The invention discloses a fiber metal laminate fatigue delamination extension test gap processing method, and the purpose of the method is to solve the processing problem of the fiber metal laminate fatigue delamination extension test initial gap; on one hand, the metal crack initiation generated by a high success rate under the fatigue load is ensured, and then the disconnecting is performed, and then delamination cracks are effectively generated; on the other hand, fiber prepregs are not damaged and the interlaminar delamination is not caused, so that the breakage of the fiber prepregs does not occur in the process of the fatigue loading for a long time, and the smooth processing of the delamination extension can be ensured.

Description

technical field [0001] The invention relates to a method for processing a notch for a fatigue layered expansion test of a fiber metal laminate, and belongs to the technical field of material mechanical performance test piece processing. Background technique [0002] Fiber metal laminate is a new type of laminate material obtained by overlapping prepregs and metal plates formed by impregnating strong fibers with specific adhesives, and then forming them through a certain curing process. It has been initially applied to large aircraft. body and wing structures. This new type of material is mainly used in aircraft damage tolerance structures. In the analysis and prediction of its damage tolerance performance, the fatigue delamination expansion performance test plays an important role. In order to apply fiber metal laminates to large aircraft structures, it is urgent to process a large number of test pieces for fatigue delamination expansion tests. In the test required test pi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B19/00
CPCB24B19/00
Inventor 李淑芬黄啸王峪环黄颐
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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