Bending strength is the strength of a specimen when it is placed on two pivot points of a plastic tensile testing machine by the simple beam method, and a concentrated load is applied in the middle of the two pivot points, which deforms the specimen until it is destroyed.
In the international standard classification, the bending strength test methods relate to medical devices, piping components and ducts, external sewage drainage systems, wood-based panels, construction materials, and mechanical tests. In the Chinese standard classification, the bending strength test methods relate to filters, delay lines, water supply and drainage equipment and devices, and concrete products.