GB/T 41061-2021 specifies the test methods for determining the creep properties of fiber-reinforced plastics, including tensile, compressive, and flexural creep properties, as well as the creep rupture stress under specified conditions. The standard defines the test principles, equipment, procedures, and result calculation requirements. The core equipment includes an electronic testing machine meeting Grade 1 accuracy, a deformation measurement device with a resolution of 0.001 mm, an automatic temperature control device with an error of ±2°C, and a dimensional measurement tool with an accuracy of 0.01 mm. By applying constant stress under specified temperature and humidity conditions and continuously recording the deformation data of the specimen, the creep modulus is calculated, and relevant curves are plotted. This provides a standardized basis for evaluating the long-term reliability of materials and product design.