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Apparatus and test method for testing structural adhesive interface bond shear strength

A technology of shear strength and interface bonding, which is applied in the direction of measuring devices, using stable shear force to test the strength of materials, and the preparation of test samples, which can solve the problems of cross specimen inclination, silicone structural adhesive shearing, etc. Problems such as poor performance and affecting the accuracy of test results, etc., to achieve the effects of avoiding torsion or eccentricity, easy to maintain stability, and easy to operate

Active Publication Date: 2016-11-09
北京玻钢院检测中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method is not suitable for evaluating the shear performance of silicone structural adhesives for doors, windows and curtain walls, because according to JGJ 102-2003 "Technical Specifications for Glass Curtain Wall Engineering", the bonding width of silicone structural adhesives should not be less than 7mm, The junction thickness should not be less than 6mm. For bonded samples with a certain adhesive layer thickness, the cross-shaped sample will generate a certain torsional load when pressurized due to the influence of the adhesive layer thickness, and the cross-shaped specimen will tilt, which will affect the test. accuracy of results

Method used

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  • Apparatus and test method for testing structural adhesive interface bond shear strength
  • Apparatus and test method for testing structural adhesive interface bond shear strength
  • Apparatus and test method for testing structural adhesive interface bond shear strength

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Example 1: Structural adhesive interface normal temperature bond shear strength test:

[0065] Sample: Double-sided cross-type test device S, in which,

[0066] Adhesive substrate test piece 1 is an aluminum alloy profile of 12mm×12mm×100mm,

[0067] Bonded specimen 2 is common float glass of 12mm×12mm×100mm,

[0068] The structural glue is: one-component silicone structural glue, the coating thickness is 6mm, and the coating area is 12mm×12mm.

[0069] The result of the test, the shear strength σ c =1.82MPa, the design requirement (Table 1) is not less than 1.5MPa, which meets the design requirement.

Embodiment 2

[0070] Example 2: Bond shear strength test after structural adhesive aging:

[0071] Sample: Double-sided cross-type test device S, in which,

[0072] Adhesive substrate test piece 1 is an aluminum alloy profile of 12mm×12mm×100mm,

[0073] Bonded specimen 2 is common float glass of 12mm×12mm×100mm,

[0074] The structural glue is: one-component silicone structural glue, the coating thickness is 6mm, and the coating area is 12mm×12mm.

[0075] Aging treatment of the double-sided cross-type test device S: take it out after soaking in a water bath at (45±1)°C for 21 days, and test it after placing it at room temperature for 1 day.

[0076] The result of the test, the shear strength σ c = 1.13MPa, the design requirement (Table 1) is that the shear strength after aging is not less than 1.4MPa, which does not meet the design requirement.

[0077] Comparative Test:

[0078] Specimen: single-sided cross-shaped specimen, in which,

[0079] The bonded substrate specimen is an alu...

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Abstract

The invention relates to a device and a testing method for testing the shear strength of structural adhesive interface bonding, comprising a bonded base material specimen and a bonded specimen bonded to each other in a cross shape with structural adhesive, the bonded specimen There are two test pieces, the two bonded test pieces are parallel to each other and located on both sides of the bonded substrate test piece, and the two bonded test pieces and the bonded substrate test piece are respectively The center of is located on the same straight line, and a compressive load is applied on the bonded substrate specimen to generate shear stress at the bonding interface of the two materials, and the interface bond shear strength is calculated by the shear stress at failure. The testing device and testing method are suitable for testing the interface bonding shear strength between different materials with a certain bonding layer thickness, and are especially suitable for evaluating the bonding strength of structural adhesives between building doors, windows, curtain walls, glass and metal substrates.

Description

technical field [0001] The invention belongs to the technical field of material mechanical performance testing, and relates to a device and a testing method for testing material interface bonding shear strength, in particular to a device for testing the bonding shear strength of structural adhesive interface for building doors, windows, curtain walls and insulating glass and test methods. Background technique [0002] Building structural adhesives (hereinafter referred to as structural adhesives) can withstand large loads, and have good aging resistance, fatigue resistance, corrosion resistance, etc., and have stable performance within the expected life, and are suitable for structural bonding of stressed components. In the field of building doors, windows and curtain walls, the commonly used structural adhesive is silicone structural adhesive, which is used for bonding insulating glass, bonding between glass and metal substrates, etc. Silicone structural adhesive has excel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/24G01N3/04G01N1/28
Inventor 刘正权包亦望陈璐张庆华杜大艳梁慧超吴蔚代铮于鸿雁仉娜魏晨光万德田邱岩刘小根
Owner 北京玻钢院检测中心有限公司
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