Ultrasonic detection test block for composite material containing multiple surface materials and manufacturing method of ultrasonic detection test block

Abstract

The invention belongs to the technical field of nondestructive testing, and relates to an ultrasonic testing test block for a composite material containing multiple surface materials and a manufacturing method of the ultrasonic testing test block. A plurality of artificial defects are arranged on the ultrasonic detection test block, and the projection distance between the artificial defects is greater than a preset distance threshold value m; the ultrasonic detection test block is divided into five areas, namely a main body material test block area, a surface local reinforcing area without a copper mesh, a surface local reinforcing area with a copper mesh, a film pasting surface reinforcing area without a copper mesh and a film pasting surface reinforcing area with a copper mesh.

Description

Technical Field

[0001] This invention belongs to the field of nondestructive testing technology and relates to an ultrasonic testing block containing multi-surface material composites and its manufacturing method. Background Technology

[0002] Composite materials, with their unique advantages, have been widely used in aerospace and other fields. To meet the requirements of various environments, corresponding surface materials are generally added to the surface of parts, such as surface films (without copper mesh), surface films (with copper mesh), and Tedra films. This results in four different layups even when the base material is the same: no surface film, surface film (without copper mesh), surface film (with copper mesh), and Tedra film. When performing ultrasonic testing on composite material parts, an ultrasonic testing comparison block must be used.

[0003] The following requirements apply to the ultrasonic testing comparison blocks for composite materials: (1) The layup information of the ultrasonic testing comparison block for composite materials should be consistent with that of the composite material parts; (2) To ensure the validity of the comparative test blocks, they generally need to be re-evaluated once a year; (3) Comparative test blocks should be stored properly to avoid damage.

[0004] Given the above requirements, having too many control blocks will inevitably bring great difficulty to the management of control blocks, such as storage and retrieval, and will also increase the manufacturing and maintenance costs of control blocks. Summary of the Invention

[0005] The technical problem to be solved by this invention is: based on the requirement for representativeness of ultrasonic testing comparison test blocks when testing composite material parts, analyze the typical layup of ultrasonic testing comparison test blocks for composite material parts, find the best test block design scheme, so that the manufactured ultrasonic testing comparison test blocks can not only meet the requirements of part testing, but also minimize the number of comparison test blocks, thereby reducing the test block manufacturing cost, maintenance cost and management difficulty.

[0006] The technical solution of the present invention is In the first aspect, an ultrasonic testing block containing a composite material with multiple surfaces is provided. Multiple artificial defects are set on the ultrasonic testing block, and the projection distance between the artificial defects is greater than a preset distance threshold m. The ultrasonic testing block is divided into 5 regions, namely, the main material test block region, the surface local reinforcement region without copper mesh, the surface local reinforcement region with copper mesh, the film-coated surface reinforcement region without copper mesh, and the film-coated surface reinforcement region with copper mesh. The main material test block area occupies most of the space of the ultrasonic testing block; its width is less than 3m and greater than 2m; its length is the sum of the lengths of the other four areas; the other four areas are located above the main material test block area, namely, the surface local reinforcement area without copper mesh, the surface local reinforcement area with copper mesh, the film-coated surface reinforcement area without copper mesh, and the film-coated surface reinforcement area with copper mesh, which are square areas of the same size; the side length of the square area ensures that the projection distance from the artificial defect located on itself to the edge of the ultrasonic testing block is greater than m, and the projection distance of the artificial defect adjacent to the artificial defect is also greater than m.

[0007] Furthermore, the order of the other four sequences is as follows: Local reinforcement area on the surface without copper mesh, reinforcement area on the film-coated surface without copper mesh, reinforcement area on the film-coated surface with copper mesh, and local reinforcement area on the surface without copper mesh; or, Local reinforcement area on the surface without copper mesh, reinforcement area on the film-coated surface with copper mesh, reinforcement area on the film-coated surface without copper mesh, and local reinforcement area on the surface without copper mesh.

[0008] Furthermore, the dimensions of the square area are 60mm×60mm or 50mm×50mm.

[0009] Furthermore, the dimensions of the main material test block area are 100mm×240mm or 90mm×200mm.

[0010] Furthermore, during the preparation of the test block, the test block also includes a porosity sampling area, the width of which is the same as that of the test block, and the length is determined by the porosity sampling requirements.

[0011] Secondly, a method for manufacturing an ultrasonic testing block containing multi-surface material composites is provided, comprising: Based on the original test block of the part, a new test block is obtained by extending it 40mm outward along the width direction; The new test block is divided into two areas, the lower area being the main material test block area, with a width of 100mm, and the upper area having a width of 60mm. The upper region is divided into four regions along the length of the new test block, which are respectively designated as the surface local reinforcement area without copper mesh, the surface local reinforcement area with copper mesh, the film reinforcement area without copper mesh, and the film reinforcement area with copper mesh. Artificial defects are arranged on the bag surface and the film surface of the surface with copper mesh, the local reinforcement area without copper mesh, the film-coated surface reinforcement area without copper mesh, and the film-coated surface reinforcement area with copper mesh. Artificial defects are arranged between the second and third layers and in the middle layer on the surface of the main material test block area.

[0012] Furthermore, the upper area is divided into 4 zones: (1) Local reinforcement area on the surface without copper mesh: The film surface is reinforced with a surface film without copper mesh; (2) Reinforced area of ​​film-coated surface without copper mesh: reinforce the film-coated surface with a surface film without copper mesh, and reinforce the bag side with Tedra film; (3) Reinforced area of ​​the film-coated surface with copper mesh: The film-coated surface is reinforced with a surface film with copper mesh, and the bag side is reinforced with Tedra film; (4) Local reinforcement area of ​​the surface with copper mesh: The film surface is reinforced with a surface film with copper mesh.

[0013] Furthermore, artificial defects are arranged in four areas, including: (1) Local reinforcement area on the surface without copper mesh: artificial defects are placed between the second and third layers of the film; (2) Reinforced area of ​​film surface without copper mesh: Artificial defects are placed between the second and third layers of the bag surface; (3) Reinforced area of ​​the film-coated surface with copper mesh: No artificial defects are placed there; (4) Local reinforcement area on the surface with copper mesh: artificial defects are placed between the second and third layers of the film.

[0014] The beneficial effects of this application are as follows: This invention provides a method for manufacturing an ultrasonic test block containing multi-surface material composite material. The design and manufacturing method is clear. While meeting the testing requirements, it can effectively reduce the number of test blocks, replacing 5 test blocks with 1 test block, thereby reducing the management difficulty and maintenance cost of the comparison test blocks, reducing the manufacturing cost of the comparison test blocks, and saving 8 times the material usage. Attached Figure Description

[0015] Figure 1 Design drawing for the test block. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. 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 only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0017] In the description of this invention, it should be understood that the terms "center", "axial", "vertical", "upper", "lower", "upper end", "bottom end", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0018] This invention uses the main material of the part as a basis, extending the original test block 40mm outward in width, and then extending it downward in width by 20mm from the extended area. The extended area is used to arrange the surface film and the Tedra film (e.g., Figure 1 ).

[0019] The expanded outer region is divided into four areas, each measuring 60mm x 60mm: (1) Local reinforcement area on the surface without copper mesh: reinforce the film surface with a film without copper mesh; (2) Reinforced area of ​​the film-coated surface without copper mesh: The film-coated surface is reinforced with a film without copper mesh, and the bag-side surface is reinforced with a Tedra film; (3) Reinforced area of ​​the film-coated surface with copper mesh: The film-coated surface is reinforced with a film with copper mesh, and the bag-side surface is reinforced with a Tedra film; (4) Local reinforcement area of ​​the surface with copper mesh: The film surface is reinforced with a copper mesh surface film.

[0020] The expanded outer region includes four zones with artificial defects, located near the main material test block area: (1) Local reinforcement area on the surface without copper mesh: artificial defects are placed between the second and third layers of the film; (2) Reinforced area of ​​film surface without copper mesh: Artificial defects are placed between the second and third layers of the bag surface; (3) Reinforced area of ​​the film-coated surface with copper mesh: No artificial defects are placed there; (4) Local reinforcement area on the surface with copper mesh: artificial defects are placed between the second and third layers of the film.

[0021] Plan the laying position on the tooling in advance, lay the local reinforcement surface film in the corresponding position, lay and press layer by layer according to the laying sequence of the comparison test block, and when laying the corresponding number of layers, place artificial defects at the positions of artificial defects according to the design drawings until all layers of the comparison test block are completed. After the layup is completed, the control test block is placed in an autoclave for curing. After curing, any excess material at the edges is trimmed.

[0022] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0023] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An ultrasonic testing block containing multi-surface material composites, characterized in that, Multiple artificial defects are set on the ultrasonic testing block, and the projection distance between the artificial defects is greater than the preset distance threshold m. The ultrasonic testing block is divided into 5 areas, namely the main material test block area, the surface local reinforcement area without copper mesh, the surface local reinforcement area with copper mesh, the film reinforcement area without copper mesh, and the film reinforcement area with copper mesh. The main material test block area occupies most of the space of the ultrasonic testing test block; Its width is less than 3m and greater than 2m; its length is the sum of the lengths of the other 4 regions; the other 4 regions are located above the main material test block area, and the surface local reinforcement area without copper mesh, the surface local reinforcement area with copper mesh, the film-coated surface reinforcement area without copper mesh, and the film-coated surface reinforcement area with copper mesh are square areas of the same size; the side length of the square area ensures that the projection distance from the artificial defect located on itself to the edge of the ultrasonic test block is greater than m, and the projection distance of the artificial defect adjacent to the artificial defect is also greater than m.

2. The test block according to claim 1, characterized in that, The order of the other four sequences is as follows: Local reinforcement area on the surface without copper mesh, reinforcement area on the film-coated surface without copper mesh, reinforcement area on the film-coated surface with copper mesh, and local reinforcement area on the surface without copper mesh; or, Local reinforcement area on the surface without copper mesh, reinforcement area on the film-coated surface with copper mesh, reinforcement area on the film-coated surface without copper mesh, and local reinforcement area on the surface without copper mesh.

3. The test block according to claim 1, characterized in that, The square area has dimensions of 60mm×60mm or 50mm×50mm.

4. The test block according to claim 3, characterized in that, The dimensions of the main material test block area are 100mm×240mm or 90mm×200mm.

5. The test block according to claim 4, characterized in that, During the preparation of the test block, the test block also includes a porosity sampling area, which has the same width as the test block and a length that takes into account the porosity sampling requirements.

6. A method for manufacturing an ultrasonic testing block containing multi-surface material composites as described in claim 1, characterized in that, include: Based on the original test block of the part, a new test block is obtained by extending it 40mm outward along the width direction; The new test block is divided into two areas, the lower area being the main material test block area, with a width of 100mm, and the upper area having a width of 60mm. The upper region is divided into four regions along the length of the new test block, which are respectively designated as the surface local reinforcement area without copper mesh, the surface local reinforcement area with copper mesh, the film reinforcement area without copper mesh, and the film reinforcement area with copper mesh. Artificial defects are arranged on the bag surface and the film surface of the surface with copper mesh, the local reinforcement area without copper mesh, the film-coated surface reinforcement area without copper mesh, and the film-coated surface reinforcement area with copper mesh. Artificial defects are arranged between the second and third layers and in the middle layer on the surface of the main material test block area.

7. The method according to claim 6, characterized in that, The upper area is divided into 4 zones: (1) Local reinforcement area on the surface without copper mesh: The film surface is reinforced with a surface film without copper mesh; (2) Reinforced area of ​​film-coated surface without copper mesh: reinforce the film-coated surface with a surface film without copper mesh, and reinforce the bag side with Tedra film; (3) Reinforced area of ​​the film-coated surface with copper mesh: The film-coated surface is reinforced with a surface film with copper mesh, and the bag side is reinforced with Tedra film; (4) Local reinforcement area of ​​the surface with copper mesh: The film surface is reinforced with a surface film with copper mesh.

8. The method according to claim 7, characterized in that, Artificial defects are arranged in four areas, including: (1) Local reinforcement area on the surface without copper mesh: artificial defects are placed between the second and third layers of the film; (2) Reinforced area of ​​film surface without copper mesh: Artificial defects are placed between the second and third layers of the bag surface; (3) Reinforced area of ​​the film-coated surface with copper mesh: No artificial defects are placed there; (4) Local reinforcement area on the surface with copper mesh: artificial defects are placed between the second and third layers of the film.

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