The mechanical properties of ultrahigh molecular weight polypropylene films with various draw ratios have been studied by WAXD and dynamic mechanical measurements.
用x -射线衍射、动态力学测定等手段研究了不同拉伸倍数的超高分子量聚丙烯薄膜的力学性能的变化。
2
To analyzed the single-layer reticulated domes of difference ratios of height to span and discover that the increment of the ratios of height to span, dynamic stability critical load decreases.
对不同矢跨比的单层球面网壳结构进行了分析，发现随着矢跨比的增大，动力稳定临界荷载减小。
3
The effects of the consolidation ratios on the maximum dynamic shear modulus and the dynamic shear modulus versus the shear strain of sands are presented by using the resonant column method.