【摘要】 本文就集中冲击力作用下的聚碳酸酯简支梁模型,研究了梁内的应力波传播问题。文中推导了梁内一维应变平面波的波速公式,并与用多火花式动态光弹系统拍出的一组等色线图的结果进行了比较,二者基本吻合。又由逐渐趋于稳定的应力条纹图得出梁的最大冲击应力并做了相应的讨论。更多还原

【Abstract】 In this paper the stress wave propagation in a polycarbonate beam under impact loading is studied. The equation of plate wave speed in one demensional strain beam is derived, and a set of isochromatic patterns are obtained by dynamic photoelasticity. The comparision of predicted and measured wave speed is made and a close agreement is found. The maximum impact stress is determined by means of stress fringe patters tending to be stable and relevant discussion is made.更多还原