RPUR静载和动载压缩性能研究

STUDY ON PROPERTY OF RIGID POLYURETHANE FOAM PLASTIC UNDER STATIC AND DYNAMIC COMPRESSIVE LOAD

对4种不同密度的硬质聚氨酯泡沫塑料(RPUR)的静载和动载压缩性能进行了实验研究。结果表明,RPUR材料的静载和动载压缩应力-应变曲线具有几乎相同的特性,其压缩性能与材料密度相关;因RPUR材料的压缩屈服应力较低,且其加载卸载压缩应力-应变曲线迟滞明显,因此不适于单独作为工程结构和路基等材料使用。

Experiments of static and dynamic compressive load are made for four kinds of rigid polyurethane foamed plastics （RPUR） of different density. The results showed that the stress-strain curves of RPUR at static load and dynamic load are similar, and the compressive property is related to the density. The yield strength of RPUR is low and its load-unload curve is apparently lagging feedback, so RPUR can＇t be applied in the structure and roadbed independently.