Briefly describe the impact strength test method

The following is a detailed introduction to the test method of punching experiment intensity:
1. Test content and purpose
This test is a method for measuring the shear impact strength of adhesives on standard samples, and specimen preparation, test methods and test conditions are specified. It is also suitable for wood-wood, metal-metal, and can also be used to determine the shear impact strength of plastic-plastic and bonded samples between them.

2. Definition

Impact value: The energy absorbed when the sample is hit by a pendulum of the impact tester. The impact value is expressed in J/m2.

3. Principle of experiment

The impact value is determined by using a pendulum typeImpact testing machineCompleted on wooden-wood or metal-metal specimens.

4. Test device

1. The pendulum speed of the pendulum impact tester is 3.4m/s.

(1) The hammer surface of the pendulum should be flat and slightly wider than the impacted sample to achieve complete collision.

(2) Fixing device for the sample
The fixture is not suitable for all shear impact testing machines. The size and design of the fixture can vary according to the test time. The fixing device can be made of steel and is fixed to theTesting machineThe corners of the base should be drilled so that the sample is completely embedded on the support end surface of the fixing device. At the same time, the fixing device should also have screws to fix the sample. When using non-metallic adhesives, a metal piece should be padded in front of the screw. This fixing device should ensure that the sample is impacted when the pendulum reaches its speed.

(3) Fixtures and adjustments

The fixing device should be kept stable under the impact of the test machine pendulum and does not move. The height of the sample and the fixing device should ensure that the lower end of the pendulum should be as close to the adhesive edge as possible during impact, within 0.8mm. Usually the distance between the top of the test machine fixture and the bottom of the pendulum is 22mm. The appropriate height of the sample can be adjusted by the position of the sample in the fixture.
The above are the specific methods for the shear impact test of adhesives. Jinan Hengsi Shanda Instrument Co., Ltd. is an enterprise specializing in the production and sales of test machines and test equipment. Welcome to call for negotiation.