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Flexible substrate-coating interface tensile bonding strength testing system and method

A flexible substrate, bonding strength technology, applied in the direction of strength characteristics, using stable tension/pressure test material strength, measuring device, etc., can solve problems such as easy deformation, flexible substrate-coating system test blank, test difficulty

Pending Publication Date: 2021-12-28
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although there are many methods for testing the interfacial bonding strength of conventional rigid substrate-coating systems, the test for flexible substrate-coating systems is almost blank, and there are no national or industry standards to follow
Since the flexible substrate is relatively soft, the coating is mostly thin and bears a small load, and is relatively easy to deform. The method of testing the rigid substrate-coating system described above will make the test difficult and difficult to implement.

Method used

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  • Flexible substrate-coating interface tensile bonding strength testing system and method
  • Flexible substrate-coating interface tensile bonding strength testing system and method
  • Flexible substrate-coating interface tensile bonding strength testing system and method

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Embodiment 1

[0043] Embodiments of the present invention provide a flexible substrate-coating interface tensile bond strength testing system, such as Figure 1-8 As shown, the system includes a flexible substrate-coating sample 1, two pulling heads 2, two pulling nails 4, two pulling fixtures 5 and an electronic universal testing machine, wherein:

[0044] The pulling head 2, the pulling nail 4 and the pulling fixture 5 are preferably made of steel. The electronic universal testing machine has two installation ends for fixing the fixture and can realize the function of pulling at a uniform speed and recording the maximum load peak value.

[0045] The flexible substrate-coating sample 1 includes a flexible substrate layer 11 and a coating 12 combined together, the pulling head 2 includes a working part 21 and a connecting part 22, and the two pulling heads 2 are symmetrically arranged on the flexible substrate-coating sample. On both sides of sample 1, the working parts 21 of the two pullin...

Embodiment 2

[0069] Embodiments of the present invention provide a flexible substrate-coating interface tensile bond strength test method, including the flexible substrate-coating interface tensile bond strength test system described in Example 1, such as Figure 1-8 As shown, the method includes:

[0070] S1: Cut out the flexible substrate-coating sample 1, and measure the area S of the surface of the flexible substrate-coating sample 1 for bonding with the working part.

[0071] This step is used to cut the sample. In some implementations, the bonding surface of the cut sample is a square, and the side length a of the square is measured with a steel ruler or a vernier caliper, and the tensile interface area S is calculated.

[0072] S2: Use an electronic balance to weigh to obtain the mass m of a drawing head 2 0 and the mass m of a pulling nail 4 1 .

[0073] In the present invention, when multiple pulling heads 2 are used, the quality of their specifications and models should remain...

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Abstract

The invention discloses a flexible substrate-coating interface tensile bonding strength testing system and method, and belongs to the field of material performance testing. The system comprises a flexible substrate-coating sample, two drawing heads, two drawing nails, two drawing clamps and an electronic universal testing machine, the flexible substrate-coating sample comprises a flexible substrate layer and a coating which are combined together, and each drawing head comprises a working part and a connecting part. The two drawing heads are symmetrically arranged on the two sides of the flexible substrate-coating sample, and the working parts of the two drawing heads are respectively bonded with the flexible substrate layer and the coating through a binder; and the connecting part of each drawing head is connected with the mounting end of an electronic universal testing machine through a drawing nail and a drawing clamp. According to the invention, the tensile bonding strength of the flexible substrate-coating interface is tested, the test result is accurate, and the stability is good.

Description

technical field [0001] The invention relates to the technical field of material performance testing, in particular to a flexible substrate-coating interface tensile bonding strength testing system and method. Background technique [0002] The tensile bonding strength of the flexible substrate-coating interface is its basic mechanical property. In the practical application of aerospace and biomedicine, the interfacial tensile bonding strength needs to be considered to achieve the purpose of structural design. [0003] Interfacial bond strength is the ability of a substrate-coating system to resist separation at the interface. Common evaluation methods for rigid substrate-coating interface bonding strength include peeling method, scratch method, bending method, tensile method, etc. The peeling method is a quantitative evaluation method. By applying a vertical force on the material interface, the material is subjected to normal tensile stress and fractured. The peeling strengt...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N3/02G01N3/04G01N19/04
CPCG01N3/08G01N3/02G01N3/04G01N19/04G01N2203/0017
Inventor 刘家臣李坤明薛云嘉马晓晖马娇媚
Owner TIANJIN UNIV