GB/T 1040.4 - 2006 Test conditions for the determination of tensile performance of isotropic and orthotropic fiber-reinforced composites in focused plastics. It specifies the applicable composite range, specifies the specifications and shape requirements of the sample prepative, and specifies the parameters of equipment such as Universal Testing Machine. Standardize the tensile test process, including key links such as loading rate and fixture selection, and also clarify the processing and reporting methods of results. The standard provides a unified specification for the relevant composite tensile performance testing, which helps enterprises control the mass of products and promotes the standardization development of the plastic reinforced composite industry.