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

Pal Jen Wei, Wei Xin Shen, Jen Fin Lin

Research output: Contribution to journalReview articlepeer-review

10 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)3911-3918
Number of pages8
JournalJournal of Non-Crystalline Solids
Volume354
Issue number33
DOIs
Publication statusPublished - 2008 Sep 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Analysis and modeling for time-dependent behavior of polymers exhibited in nanoindentation tests'. Together they form a unique fingerprint.

Cite this