GB/T 41933-2022 "Plastics, Determination of tensile-tensile fatigue crazing expansion, Linear Resilience Fracture Mechanics (LEFM) method" is a Chinese national standard that specifies a test method for measuring the crazing expansion behavior of plastic materials under tensile-tensile fatigue loading using the Linear Resilience Fracture Mechanics (LEFM) method. This standard is suitable for evaluating the anti-crazing expansion performance of plastic materials under cyclic loading, providing an important basis for material design and engineering applications. The standard describes the test equipment, sample prepative, test procedure, data processing and result report in detail to ensure the accuracy and comparability of test results. Through this standard, the failure behavior of plastic materials under fatigue loading can be better understood and predicted, which helps to improve the service life and safety of materials.