CN211206206U - An indenter assembly for testing the bonding strength between layers of multi-layer composite materials by pressing method - Google Patents

Abstract

The utility model discloses a pressure head component for testing the interlayer bonding strength of a multilayer composite material by a pressurization method, which comprises two semicircular section supporting blocks and two conical pressure heads, wherein the semicircular section supporting blocks are provided with grooves with semicircular sections at the axes of cylindrical surfaces; when the device is used, the two semicircular section supporting blocks are spliced into a cylinder shape and inserted into a round hole in a multilayer composite material spline with a round hole in the middle, and a universal material testing machine is used for measuring the force which is generated by the force of pressure applied to the two conical pressure heads and transmitted to the grooves in the two semicircular section supporting blocks and is perpendicular to the plane of the sheet layer of the multilayer composite material, so that the interlayer bonding strength of the multilayer composite material is measured. Additionally, the utility model discloses simple structure is small and exquisite, portable, reasonable in design and make simple, convenient to use, easily operation, is favorable to using widely.

Description

An indenter assembly for testing the bonding strength between layers of multi-layer composite materials by pressing method

technical field

The utility model belongs to the technical field of material performance testing, in particular to an indenter assembly for testing the bonding strength between layers of a multi-layer composite material by a pressing method.

Background technique

Multi-layer composite material is a kind of composite material made by laminating and adhering multiple sheets, and has a wide range of applications in furniture boards, ship hulls, aircraft shells, electric vehicle shells, etc. In general, the stronger the adhesion between the sheet layers constituting the multi-layer composite material, the better the mechanical properties of the multi-layer composite material.

The interlaminar bond strength of a multilayer composite can usually be measured by applying a shear or peel force to two adjacent sheets of the multilayer composite by a universal material testing machine. Universal material testing machine, also called material tensile testing machine, electronic tensile testing machine, is composed of chuck, measuring system, driving system, control system and other structures. Pressure is applied to the material to measure the compressive strength of the material. .

The force that stretches the sheets perpendicular to the sheet layer is difficult to apply to the multi-layer composite material, so the interlayer bonding strength of the multi-layer composite material is difficult to measure accurately.

SUMMARY OF THE INVENTION

The purpose of this utility model is to overcome the above-mentioned deficiencies in the prior art, and to provide an indenter assembly for testing the interlayer bonding strength of multi-layer composite materials by pressing method, which can effectively measure the interlayer bonding strength of multi-layer composite materials. Determination.

In order to achieve the above purpose, the technical scheme adopted by the present utility model is: an indenter assembly for testing the bonding strength between layers of multi-layer composite materials by pressing method, which is characterized in that: it includes a semicircular section support block and a conical indenter; There is a groove with a semicircular section at the axis of the cylindrical surface of the semicircular section support block; the number of the semicircular section support block is two, and two of the semicircular section support blocks can be combined into one Cylindrical; the number of the conical indenters is two, the two conical indenters are symmetrically arranged at both ends of the cylinder formed by the two semicircular cross-section support blocks, and the two The conical tips of the conical indenters are respectively aligned with the two ends of the grooves on the semicircular section support block.

The above-mentioned indenter assembly for testing the bonding strength between layers of multi-layer composite materials is characterized in that: the semicircular section support block and the conical indenter are all made of metal.

When the above-mentioned indenter assembly for testing the bonding strength between the layers of the multi-layer composite material is used, the two semicircular cross-section support blocks are assembled into a cylindrical shape and inserted into the multi-layer composite material with a circular hole in the middle. In the circular hole on the spline, the axis of the circular hole of the multi-layer composite material spline with the circular hole in the middle is parallel to the plane of the layer of the multi-layer composite material. placed in parallel with the sheet plane of the multi-layer composite material; the conical tips of the two conical indenters are aligned with the two ends of the groove on the semicircular cross-section support block; the two conical The shaped indenters are respectively pressed by the two pressing heads of the universal material testing machine, so that the conical faces of the two conical indenters exert pressure on both ends of the grooves on the two semicircular cross-section support blocks, thereby Drive the two semicircular cross-section support blocks to apply a spreading force perpendicular to the sheet plane of the multilayer composite material from the circular hole in the middle of the multi-layer composite spline with a circular hole. The interlayer bond strength of the multi-layer composite is measured by the applied pressure measured by the universal material testing machine.

Compared with the prior art, the utility model has the following advantages:

1. The utility model can apply the force perpendicular to the sheet layer to the multi-layer composite material by applying pressure, so as to accurately measure the interlayer bonding strength of the multi-layer composite material;

2. The semicircular section support block and the conical indenter of the present invention can be disassembled and then put into the packing box, so that the indenter assembly provided by the present invention is easy to carry;

3. The utility model is convenient to use, easy to test and operate, and is conducive to popularization and use;

4. The utility model has the advantages of simple structure, reasonable design and simple manufacture, which is favorable for popularization and use.

The present utility model will be described in further detail below through the accompanying drawings and embodiments.

Description of drawings

Figure 1 is a diagram of the installation and connection parts of the semicircular section support block and the conical pressure head of the utility model.

2 is a perspective view of a semicircular cross-section support block of the present invention.

FIG. 3 is a state diagram of the parts of the utility model after they are assembled and in use.

Figure 4 is a perspective view of a multi-layer composite spline with holes in the middle.

Description of reference numbers:

1—Semi-circular section support block; 2—Conical indenter; 3—Multilayer composite spline with a circular hole in the middle.

Detailed ways

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the utility model includes a semicircular section support block 1 and a conical indenter 2; The number of the semicircular section support blocks 1 is two, and the two semicircular section support blocks 1 can be combined into a cylindrical shape; the number of the conical indenters 2 is two The two conical indenters 2 are symmetrically arranged at both ends of the cylinder formed by the two semicircular cross-section support blocks 1, and the conical tips of the two conical indenters 2 are aligned respectively Both ends of the groove on the semi-circular section support block 1 .

In this embodiment, the semicircular section support block 1 and the conical indenter 2 are all made of metal.

The working principle of the utility model is as follows: when in use, the two semicircular cross-section support blocks 1 are assembled into a cylindrical shape, and inserted into the circular hole on the multi-layer composite material spline 3 with a circular hole in the middle. The axis of the circular hole of the multi-layer composite material spline 3 with circular holes is parallel to the plane of the multi-layer composite material, and the piecing surface of the two semicircular cross-section support blocks 1 is parallel to the layer plane of the multi-layer composite material. Placed in a parallel state; the conical tips of the two conical indenters 2 are aligned with the two ends of the groove on the semicircular cross-section support block 1 respectively; the two conical indenters 2 are respectively universal The two pressing heads of the material testing machine exert pressure, so that the conical faces of the two conical pressing heads 2 exert pressure on both ends of the grooves on the two semicircular cross-section support blocks 1, thereby driving the two semicircular sections. The circular section support block 1 applies a spreading force perpendicular to the sheet plane of the multilayer composite material to the two sides of the multi-layer composite material spline 3 with a circular hole in the middle. The material testing machine measures the applied pressure to measure the interlayer bond strength of the multi-layer composite material.

Claims (2)

1. The utility model provides a pressure head subassembly of bonding strength between pressurization test multilayer combined material layer which characterized in that: comprises a semicircular section supporting block (1) and a conical pressure head (2); the axis of the cylindrical surface of the semicircular section supporting block (1) is provided with a groove with a semicircular section; the number of the semicircular section supporting blocks (1) is two, and the two semicircular section supporting blocks (1) can be spliced into a cylinder; the quantity of conical pressure head (2) is two, two conical pressure head (2) symmetry sets up two the columniform both ends of semicircular cross section braced block (1) amalgamation, and two conical tip of conical pressure head (2) is adjusted well respectively the both ends of the recess on the semicircular cross section braced block (1).

2. The indenter assembly for testing the interlayer bonding strength of a multi-layer composite material by a pressing method according to claim 1, wherein: the semicircular section supporting block (1) and the conical pressure head (2) are made of metal materials.

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