This article is provided by Jinan Zhuyan Instrument and Equipment***.
Polarizing internal stress detector is an optical device dedicated to measuring the internal stress of materials, using the principle of polarization to reveal the internal stress pattern of materials. The instrument is widely used in materials science, physics, chemistry and mechanical engineering to help researchers and engineers gain insight into the properties and structure of materials. Below, we will discuss in detail the operating principle, scope of application and advantages of polarization internal stress detectors.
The principle of operation of a polarized internal stress tester is derived from the characteristics of polarized light. When light penetrates certain crystals, the direction of polarization changes, and this change is closely related to the internal stresses of the crystals. Therefore, by measuring the change in polarized light after passing through the crystal, we can infer the specific situation of the stress inside the crystal.
The polarization internal stress detector is mainly composed of a light source, a polarizer, a polarizer, a light intensity detector and computer software and hardware. When inspecting a material, the light produced by the light source is converted into polarized light by a polarizer, and the polarization direction changes as the light passes through the crystal to be measured. Immediately afterward, the light passes through the polarizer, whose job is to reverse the changed polarization direction. At this time, the light intensity detector will measure the light intensity, which will then be analyzed and processed by the computer control system to give the stress condition inside the crystal to be measured.
Scope of application: Materials science: polarizing internal stress detector is suitable for the microstructure and properties of various materials, including metals, non-metals, composite materials, etc. By detecting the internal stress patterns of materials, we can understand their mechanical properties, thermal properties and even aging properties.
Physics: Polarized internal stress detectors can be used to explore various physical phenomena, such as light propagation, crystal structure, phase transitions, etc. By detecting the changes in light after passing through the material, we can understand the physical properties of the material, such as the refractive index, optical constant, etc.
Chemistry: Polarizing internal stress detectors are suitable for studying the structural and property changes of materials during chemical reactions. For example, when studying corrosion in materials, the degree and mechanism of corrosion can be inferred by detecting fluctuations in the stress inside the material.
Mechanical engineering: Polarized internal stress tester can be used for non-destructive testing and reliability evaluation of mechanical parts. For example, in the automotive industry, the instrument is often used to detect the internal stress state of engine parts to ensure their safety and reliability.
Advantage: High precision: The polarizing internal stress detector has extremely high accuracy and can accurately detect the stress state inside the material. This is essential for studying and controlling material properties and quality.
Non-destructive: The polarizing internal stress detector is a non-destructive testing method that does not cause any damage or destruction to the material. Therefore, it has become one of the commonly used tools in the field of non-destructive testing of materials.