# OS-V: 1200 Bar Impact

Taylor TestAn elastic-plastic cylindrical bar impacts a rigid planar target with a high velocity (120-266 m/s). Verify the deformation results with the real test results.

Cylindrical bar: length L = 16mm, radius R = 4mm

## Model Files

## Benchmark Model

The finite element model, as shown in Figure 1 is meshed with first order CHEXA elements (32 elements along its length and 8 elements along its radius). The bar to target contact is frictionless. The appropriate boundary conditions are applied on the symmetry planes of the quarter model. The cylindrical bar is imparted 3 different velocities of 120.170 and 266 m/s.

## Material

**Bar (Elastic-Plastic Stainless Steel) Material Properties**- Young's modulus
- 2.10E+05 N/mm
^{2} - Poisson's ratio
- 0.3
- Density
- 7.85E-09 ton/mm
^{3}

**Johnson & Cook Plasticity Parameters**- A
- 350
- B
- 1000
- n
- 0.65
- C
- 0.07
- m
- 1

## Results

Impact Velocity | Length/Radius | Reference Value | OptiStruct Results | |
---|---|---|---|---|

Absolute Value | Error % | |||

120 m/s | Length | 15.3 | 15.1 | -1.30 |

Forward Radius | - | 4.433 | - | |

Mid-Length Radius | - | 4.050 | - | |

176 m/s | Length | 14.6 | 14.320 | -1.90 |

Forward Radius | 4.8 | 4.753 | -1.04 | |

Mid-Length Radius | 4.1 | 4.128 | +0.68 | |

266 m/s | Length | 13.3 | 12.980 | -2.40 |

Forward Radius | 5.5 | 5.362 | -2.50 | |

Mid-Length Radius | 4.2 | 4.335 | +3.21 |

## Reference

Calleja P., Terras C., Dormeval R., Ansarf J.-P. (CEA): “Taylor's test on aluminum, copper and stainless steel”, Physics Journal, colloquium C5, supplement to no. 8, Vol. 46, August 1985, pp. C5-91 to C5-99