Tension testing machine is used in metal wire

Tension testerTests should be made regarding metal wires;
1. The elastic coefficient is the elastic Young's modulus
Definition: The ratio of the normal stress component in the same phase to the normal strain. In order to determine the coefficient of rigidity of the material, the higher the value, the stronger the material.
2. Proportional limit: The load can be maintained in a proportional relationship with elongation within a certain range, and its stress is the proportional limit.
3. Elasticity limit: The stress that the material can withstand without deformation.
4. Elastic deformation: After removing the load, the deformation of the material completely disappears.
5. Deformation: After removing the load, the material remains deformed.
6. Yield point: When the material is stretched, the deformation increases rapidly and the stress remains unchanged. This point is the yield point. The yield point is divided into upper and lower yield points, and generally the above yield point is used as the yield point. Yield: The load exceeds the proportion limit and is no longer proportional to the elongation. The load will suddenly drop, and then rise and fall over a period of time, and the elongation will undergo a large change. This phenomenon is called yield.
7. Yield strength: When stretching, the load weight at which the elongation reaches a certain specified value is divided by the original cross-sectional area of ​​the parallel part, and the quotient obtained.
8. Spring K value: the ratio of the force component in phase with deformation and deformation.
9. Effective elasticity and hysteresis loss: When the sample is stretched to a certain elongation or stretched to a specified load at a certain speed on a multi-function tensile test machine, the percentage of the ratio of the work recovered when the sample is contracted and the work consumed when the sample is stretched is measured, which is effective elasticity; the percentage of the ratio of the energy lost during elongation and shrinkage to the work consumed when the sample is stretched, which is the hysteresis loss.
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