硬质聚氨酯泡沫塑料复合梁的极限承力分析

运用梁的弯曲理论推导出几种硬质聚氨酯泡沫塑料复合梁的极限承力关系式，它们与密实态的硬质聚氨酯和纤维等的力学性质及相应的几何尺寸相关。在复合梁的受拉部位添加纤维等抗拉材料是提高复合梁极限承力的有效方法。采用不同的工艺可以形成不同截面结构的梁，从而具有不同的极限承力性能，实现梁性能的可设计化。

The Critical Load of Rigid Polyurethane Foam Composite Beam

This paper gives out some relations about the critical loads of rigid polyurethane foam compositebeams. They are related with the mechanical and sizes of composites. With different methods, the beams with neededmechanical properties are obtained.