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Manufacturing method of reference block for layering defect detection of composite material laminate structure

A technology of composite material layer and comparison test block, which is applied in the preparation of test samples, etc., can solve the problems that the deepest hole cannot be guaranteed, and it is between layers.

Pending Publication Date: 2021-11-30
CHINA AIRPLANT STRENGTH RES INST
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Problems solved by technology

[0006] The purpose of this application is to provide a comparison test block manufacturing method for the detection of delamination defects in composite laminate structures, so as to solve the problem in the prior art that the deepest hole cannot be guaranteed to be between layers

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  • Manufacturing method of reference block for layering defect detection of composite material laminate structure
  • Manufacturing method of reference block for layering defect detection of composite material laminate structure
  • Manufacturing method of reference block for layering defect detection of composite material laminate structure

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Embodiment Construction

[0027] In order to make the purpose, technical solution and advantages of the application more clear, the technical solution in the embodiment of the application will be described in more detail below in conjunction with the drawings in the embodiment of the application.

[0028] A method for making a comparison test block for detection of delamination defects in a composite material laminate structure. Each flat-bottomed hole in the comparison test block must reach the paving surface between the layers specified in the design drawing, and the paving surface reached by the flat-bottomed holes of different depths The veneer is different, and the drill bit processes the flat-bottomed hole on the back (lower surface) of the comparison test block.

[0029] Such as figure 1 shown, including:

[0030] Step S100, a drawing of a comparison test block designed according to the object to be inspected;

[0031] Step S200, according to the layered size of the drawing cutting polytetra...

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Abstract

The invention relates to the technical field of nondestructive testing of composite material structures, in particular to a manufacturing method of a reference block for layering defect detection of a composite material laminate structure, which comprises the following steps of designing a drawing of the reference block according to a detected object, cutting the polytetrafluoroethylene film according to the layering size of the detected object, manufacturing a positioning plate according to the designed drawing, and forming open holes corresponding to the flat-bottom holes in the positioning plate, paving the prepreg according to the designed drawing, and fixing the polytetrafluoroethylene film on the paving surface through a positioning plate, curing the reference block, and drilling a hole to the position of the polytetrafluoroethylene film by a drill bit. The method has the technical effects that the deepest part of the rotating hole can be ensured to be positioned between layers, and then the accurate positioning of the layered artificial defect in the depth direction is realized.

Description

technical field [0001] The application belongs to the technical field of non-destructive testing of composite material structures, and in particular relates to a comparison test block manufacturing method for detecting delamination defects of composite material laminate structures. Background technique [0002] Laminate composite materials are two or more thin layers of fibers glued together to form a whole. The structure has low interlayer strength and weak compression resistance, and is prone to degumming or cracking between adjacent layers due to local separation or insufficient adhesion during the manufacturing and use stages to form planar delamination defects. Under the condition of mechanical or thermal load, delamination will extend in the structure. In severe cases, it may lead to material fracture, which is a precursor to catastrophic failure of the structure. Therefore, it must be 100% comprehensive non-destructive testing on a regular basis. [0003] Like the ge...

Claims

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Application Information

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IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 王丹詹绍正宁宁曲亚林杨鹏飞樊俊铃
Owner CHINA AIRPLANT STRENGTH RES INST
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