Dynamic Characterization of Frequency Response of Shock Mitigation of a Polymethylene Diisocyanate (PMDI) Based Rigid Polyurethane Foam
作者: Bo SongKevin Nelson
刊名: Latin American Journal of Solids and Structures, 2019, Vol.12 (9), pp.1790-1806
来源数据库: Directory of Open Access Journals
DOI: 10.1590/1679-78251585
关键词: Kolsky barFoam materialShock mitigationFrequency responseEnergy dissipationAcceleration
原始语种摘要: Abstract Kolsky compression bar experiments were conducted to characterize the shock mitigation response of a polymethylene diisocyanate (PMDI) based rigid polyurethane foam, abbreviated as PMDI foam in this study. The Kolsky bar experimental data was analyzed in the frequency domain with respect to impact energy dissipation and acceleration attenuation to perform a shock mitigation assessment on the foam material. The PMDI foam material exhibits excellent performance in both energy dissipation and acceleration attenuation, particularly for the impact frequency content over 1.5 kHz. This frequency (1.5 kHz) was observed to be independent of specimen thickness and impact speed, which may represent the characteristic shock mitigation frequency of the PMDI foam material under investigation....
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  • 标本 冲击碰撞
  • diisocyanate 二异氰酸盐
  • material 充填料
  • mitigation 水的软化
  • attenuation 衰减
  • polymethylene 聚甲烯
  • dissipation 耗散
  • polyurethane 聚氨酯
  • impact 冲击碰撞
  • specimen 冲击碰撞
  • acceleration 促进酌