{
 "title": "Taylor bar impact (copper)",
 "kind": "experiment",
 "source": "Wilkins and Guinan, 'Impact of cylinders on a rigid boundary', Journal of Applied Physics 44 (1973) 1200–1206 (final length and mushroom diameter vs impact speed)",
 "status": "pending",
 "requires": "the measured final shapes, to be transcribed from the paper (explicit Johnson–Cook plasticity is in)",
 "quantities": [
  {
   "id": "final_length",
   "quantity": "final over initial length",
   "value": null
  }
 ]
}