Common nouns in the operation of the testing machine (1)

In the course of the experiment, some nouns are often encountered, and I will sort out some of them here.

1. Bending: The compressive or tensile force applied to both ends of the sample to bend the sample.

2. Impact energy: In the impact test of impact tools, the energy required for the sample to rupture under the impact load. Its alternative terms are impact value, impact strength, impact resistance and energy absorption.

3. Impact strength: In the impact test, the energy required for the specimen to rupture under a relatively high-speed impact load in a short time is a reflection of the toughness of the material. Also called impact energy, impact value, impact resistance and energy absorption.

4. Impact test: A method for determining the characteristics of a specimen when it is impacted by an external force in a bending, tensile or torsion test, usually by measuring the specimen subjected to such as simply supported beam impact test, cantilever beam impact test and tensile impact The energy absorbed by the pendulum in the test. The impact test also causes the sample to be subjected to multiple impacts with increasing strength, such as the drop weight impact test and the repeated impact test. Impact resilience and rebound hardness are measured in a non-destructive impact test.

5. Twist test: a test method to determine the flexibility of the metal wire.

6. Modulus: the ratio of stress to strain of the material under stress. Corresponding to different stress states, there are different titles. Can replace elastic modulus. Within the limit of elasticity, the deformation of an object subjected to external force is proportional to the external force received. Deformation varies with the direction in which the force acts, and the force that causes the object to extend is called "tensile force" or "tension".

7. Elongation: It is an index to describe the plastic properties of materials.

8. Peel test: The process of separating the rubber coating or rubber layer from the substrate (such as metal or cloth) or another rubber layer under the action of external force. It is different from ripping: peeling starts from the edge of the interface, and ripping is the simultaneous stress of the entire bonding surface. According to the difference between the tensile force and the angle between the bonding surfaces during peeling, it can also be divided into 180 ° peeling and 90 ° peeling.

9. Shear force test: Shearing is a relative error of the cross section of the material along the direction of the external force under the action of a pair of lateral external forces that are close to each other, the same size, and point in opposite directions (that is, the force parallel to the action surface) Dynamic deformation phenomenon. The force that can cause a material to shear deformation is called shear force or shear force. The section where shear deformation occurs is called the shear plane.

10. Fatigue test: under the cyclic loading of materials or parts and components, local permanent damage is generated at a certain point or certain points, and a crack is formed after a certain number of cycles, or the crack is further extended until it completely breaks.

11. Insertion and withdrawal force test: The tension between the terminal and the wire is called the tensile strength, which refers to the riveting strength between the two, and the size is related to the conductor cross-sectional area of ​​the wire. The insertion force refers to the insertion force and the extraction force between the terminal and the (mating) terminal or insert.

12. Static bending strength test: The static bending strength is to determine the ratio of the bending moment and the flexural section modulus of the specimen under the maximum load.

Flight Case

Aluminum Flight Case,Aluminum Trolley Flight Case,Flight Case Plastic,Flight Case Parts

Changzhou Junye Aluminum Case Co., Ltd , https://www.junye-box.com