Impact of an Aluminum Bar

Description

An aluminum cylindrical bar traveling at a velocity of 478 m/s along its axial direction hits a rigid boundary. Calculate the length of the bar at time t = 31 microseconds after initial impact.

File Name

Browse to drive letter:\Users\Public\Public Documents\SOLIDWORKS\SOLIDWORKS version\samples\Simulation Examples\Verification\Aluminum_Bar.SLDPRT and open the file.

Study Type

Drop Test

Mesh Type

Solid mesh

Meshing Parameters

Use a Standard mesher with Global Size of 0.20 cm.

Material Properties

Elastic plastic with isotropic hardening:
  • Elastic modulus = 70 GPa
  • Poisson's ratio = 0.3
  • Yield stress = 420 MPa
  • Tangent Modulus = 0.1 GPa
  • Density = 2700 kg/m3
  • Hardening Factor = 0

Setup Parameters

  • Initial velocity of bar = 478 m/s
  • Acceleration due to gravity = 9.81 m/s2
The rigid target is oriented normal to the direction of gravity.

Results

The displacement UZ (cm) plot is shown at t = 31 microsec after the initial impact.



The maximum magnitude of UZ is about 0.93 cm at t = 31 microseconds. The length of the bar at this instant is (2.347-0.930=1.417 cm). Experimental results showed 1.319 cm.

Reference

Wilkins M.L. and Guinan M.W., "Impact of Cylinders on a Rigid Boundary", Journal of Applied Physics, Volume 44, No. 3, 1973.