Experimental and numerical analysis of dynamic plastic behavior of long metallic bars under axial impact

Computations and Simulations in Mechanical Science

مقاله 1، دوره 1، شماره 1، خرداد 2018، صفحه 1-11   

نوع مقاله: Original Article

نویسندگان

Majid Alitavoli^{* 1}؛ Hamed Sadeghi²؛ Seyed Mohsen Mosavi³؛ Reza Rajabiehfard²

¹University of Guilan

²Department of Mechanical Engineering, University of Guilan, Rasht, Iran

³Department of Mechanical Engineering, Ahrar Institute of Technology & Higher Education, Rasht, Iran

چکیده

In this paper, dynamic behavior of long metallic bars subjected to axial impact is investigated experimentally and numerically. Bars made of steel without and with attached mass are impacted against a rigid wall. Experimental tests are performed by gas gun and numerical results are obtained using FE simulation. Results of shortening, axial force and buckling shape of two mentioned bars are presented. Obtained results for bar without and with attached mass with the same impact energy are compared. It is found that at the same impact energy, shortening and axial force of empty bar and bar together with attached mass is identical, approximately. Also, the deformation mechanism of empty bar and bar together with attached mass is different in which the radial deflections of bar with attached mass is higher than bar without attached mass. Comparing experimental and numerical results shows a good agreement between them.

کلیدواژه‌ها

Long bars؛ Axial impact؛ Dynamic buckling؛ Gas gun؛ Deformation mechanism