弯曲组合叠梁的应变分析与实验研究

Strain Analysis & Experimental Research of the Bending Composite Beams

以两梁叠加为例,进行了弯曲组合叠梁的应变理论分析和实验研究,通过理论值与实验测量值的比较,验证了弯曲组合叠梁的应变公式的正确性及其应变大小符合平截面假定的规律;通过在叠梁的上、下梁间加入树脂薄膜来减小上、下梁间的摩擦力,并通过对不加树脂薄膜的钢-钢叠梁、铝-钢叠梁和加入树脂薄膜的钢-钢叠梁、铝-钢叠梁进行应变测量和对应变数据进行对比分析,讨论了叠梁间摩擦力的影响.

It is proved that the formulas for solving the strain are correct and the strain is consistent with the law of plane cross-section assumption, through the comparison between the theoretical value and the meas- ured value. In order to reduce the influence of friction, resin membranes are placed in Steel-Steel composite beams and Al-Steel composite beams. Strain measurements are performed on without resin composite beam and adding resin composite beam. Through the comparative analysis on the strain data, the influence of friction be- tween the composite beams is discussed.