Device and method for testing adhesion performance of adhesive for sheet substrate

Abstract

The invention discloses a device for testing the adhesion performance of an adhesive for a sheet substrate. The device comprises the sheet substrate, a loading block and a tensile test assembly loading component, wherein the loading block and the sheet substrate are adhered and fixed so as to form a test assembly; the tensile test component loading component comprises a test machine loading connecting piece, a test assembly connecting piece and a connecting device; the connecting device, the test assembly connecting piece and the test machine loading connecting piece are sequentially connected; the test assembly is connected with the test assembly connecting piece by virtue of the connecting device; the test machine loading connecting piece is connected with a test machine so as to perform a tensile failure breakdown test. The invention further discloses a method for testing the adhesion performance of the adhesive for the sheet substrate and an experience correction method. The device and the method has the characteristics of being simple in structure, convenient to operation, capable of effectively testing and evaluating the adhesion performance of a certain adhesive with the sheet substrate, further capable of testing any test assembly based on tensile shearing combination, and the like.

Description

technical field [0001] The invention relates to the field of adhesive performance testing, in particular to an adhesive adhesive performance testing device and method for sheet substrates. Background technique [0002] Adhesive technology is a material connection technology commonly used in engineering. Compared with traditional welding, riveting, bolting and other connection methods, the bonding technology has the advantages of simple process, cost-effectiveness, reduced body weight, reduced energy consumption, slow vibration and noise reduction, relatively uniform stress distribution on the joints, and a wide range of applicable materials And it can realize connection of dissimilar materials, neat appearance and many other advantages. [0003] In recent years, with the rapid development of adhesives and people's higher and higher requirements for vehicle comfort, safety, and lightweight, the application of adhesive technology in automobile manufacturing has become increas...

AI Technical Summary

Problems solved by technology

It is easy to cause the load on the bonding area to be not pure shear, and a relatively complicated stress state appears, which cannot be used as a basis for evaluating the bonding performance of the adhesive under the state of pure shear stress

For this reason, the present invention designs a loading block made of aluminum alloy, which ensures that the specimen does not bend and deform during the test, and the load acting on the bonding surface does not change. At the same time, it is considered that some materials are processed into Large-sized block test pieces are not only difficult to operate, but also increase the cost of the test and easily cause waste. Therefore, these materials are processed into sheet-shaped substrates, and the sheet-shaped substrates are bonded on the aluminum alloy loading block to achieve the test adhesive. The purpose of adhesive performance with respect to sheet substrates

[0006] However, in the peel test, the adhesive layer is mainly subjected to tensile stress, which cannot fully reflect the bonding performance of the adhesive under the combined tension-shear stress state widely existing in the body structure.

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