splˈɪthˈɑːpkɪnsən pɹˈɛʃɚ bˈɑːɹ, ɐn ˌæpɚɹˈæɾəs fɔːɹ tˈɛstɪŋ ðə daɪnˈæmɪk stɹˈɛsstɹˈeɪn ɹᵻspˈɑːns ʌv mətˈɪɹiəlz, nˈeɪmd ˈæftɚ bˈɜːtɹæm hˈɑːpkɪnsən
Split-Hopkinson pressure bar, an apparatus for testing the dynamic stress-strain response of materials, named after Bertram Hopkinson