Analysis and modeling for time-dependent behavior of polymers exhibited in nanoindentation tests

Pal Jen Wei, Wei Xin Shen, Jen Fin Lin

研究成果: Review article同行評審

11 引文 斯高帕斯(Scopus)

摘要

Through the arrangement of the applied load, experimental nanoindentation results of polymethylmethacrylate (PMMA) and polyurethane (PU) employed to establish a mechanical model. The proposed model consists of irreversible delayed plastic (viscoplastic) deformation, irreversible viscous deformation, and reversible delayed elastic (viscoelastic) deformations. The phase lag exhibited between the responding depth and the oscillating load is found to be linear proportional to frequency in the range of 1-50 Hz. The residual cavity profile of the PMMA scanned by an atomic force microscope gives a validity of accommodation assumption applied in the present model. The effects of overshooting, which occurred in the dwelling process, are also discussed.

原文English
頁(從 - 到)3911-3918
頁數8
期刊Journal of Non-Crystalline Solids
354
發行號33
DOIs
出版狀態Published - 2008 九月 1

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 陶瓷和複合材料
  • 凝聚態物理學
  • 材料化學

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