GB/T 30020-2023 "Glass Defect Detection Method - Photoelastic Scanning Method" is a national standard in China that provides guidelines for the detection of defects in glass using the photoelastic scanning technique.
Glass defects can compromise the quality and durability of glass products, and it is essential to detect and evaluate these defects accurately. The photoelastic scanning method is a non-destructive testing method that utilizes the principles of photoelasticity to identify and analyze defects in glass.
This standard specifies the equipment, procedures, and evaluation criteria for conducting photoelastic scanning tests on glass samples. It covers various types of defects, including stress, strain, and thermal defects. The testing process involves applying stress to the glass sample and observing the resulting interference patterns using a polariscope. These patterns can help identify and characterize the defects present in the glass.
The standard provides detailed instructions on sample preparation, test conditions, data analysis, and reporting requirements. It also includes guidelines for calibration and verification of the photoelastic scanning equipment to ensure accurate and reliable results.
Adhering to GB/T 30020-2023 helps manufacturers, researchers, and quality control personnel in the glass industry to identify and mitigate defects effectively. By employing the photoelastic scanning method, this standard contributes to improving the overall quality and safety of glass products.