矩形薄板在面内撞击下动力屈曲的实验研究

Experimental investigation on dynamic buckling of thin rectangular plates subjected to in-plane impact

利用Hopkinson压杆系统对矩形薄板在面内撞击下的动力屈曲进行了实验研究。结果表明矩形薄板存在屈曲后强度,在屈曲发生后面内载荷可以继续增加,通过记录屈曲发生的时间求得临界屈曲长度,并对实验模型进行了理论分析。对比分析结果表明,当压应力波向前传播一定距离后矩形薄板发生局部屈曲,得到的临界屈曲长度与理论计算结果吻合良好。

The dynamic buckling of thin rectangular plates subjected to in-plane impact was investigated experimentally.The result indicates that after buckling the plate can be in-plane loaded further and is of postbuckling strength.The critical buckling length of the thin rectangular plate was obtained by recording the buckling time.The experimental model was also analysed by using theoretical method.By comparing the results it is indicated that partial buckling occurs in the thin rectangular plate when the compression wave propagates a certain distance.The critical buckling length obtained in the experiment is in reasonable agreement with the analytical calculation result.