PDF (2.494 MB).pdf

epjconf_dymat2021_06009.pdf
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🔗 Source: epj-conferences.org
📊 Size: 2.49 MB
👤 Author: Jakkula Puneeth, Ganzenmüller Georg, Beisel Samuel, Hiermaier Stefan
⬇️ Downloads: 184

Summary

This work implements a direct impact Hopkinson bar setup to investigate dynamic force equilibrium in low-impedance materials, using polycarbonate as the bar material, which allows for a long pulse duration. The setup is applied to polyurethane foams with different densities, and dynamic compression tests are performed at various strain rates. The results show a saturation in yield strength increase at high strain rates, or even negative strain rate sensitivity for low-density foams, which is explained by a phenomenon similar to shock in solid materials, where homogeneous compression is replaced by a localized collapse front. Digital image correlation is used to analyze elastic and plastic compaction waves.

Description

This work implements a direct impact Hopkinson bar setup to investigate dynamic force equilibrium in low-impedance materials, using polycarbonate as the bar...

Technical Information

  • File Format: PDF
  • File Size: 2.49 MB
  • Pages: 7
  • Language: EN
  • Author: Jakkula Puneeth, Ganzenmüller Georg, Beisel Samuel, Hiermaier Stefan
  • Total Downloads: 184
  • Last Updated: 19 hours ago

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