【摘要】 本文报导了含缺陷的固支梁受圆柱形飞射物撞击的实验过程和实验结果,分析和讨论了输入能量、切口深度、质量比等参数对非完善梁塑性动力响应特性的影响。更多还原

【Abstract】 The results of the clamped imperfect (or notched) beams subjected to impact at the mid-span tests are reported. The maximum angle at notched section and the deflection of the beams are measured to assess the plastic behavior of the dynamic loaded imperfect beams. As the tests show that the imperfections have the effect of concentrating the strain locally, the rigid-plastic analysis in which the plastic strain is idealized to the plastic hinges seems to be a reasonable approximation. The angles at notch sites are large for the deep notches near the clamped end of the beams. However, the relation between the angle of the notch and the input energy is found to be complicated because of the membrane force developed by the finite displacement of the geometry change of the beams. For the light strikers, the deflection of the beams is insensitive to the notch depath and its position.更多还原