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Sensitivity of PMMA nanoindentation measurements to strain rate
Author(s) -
Jin Tao,
Zhou Zhiwei,
Liu Zhenguo,
Xiao Gesheng,
Yuan Guozheng,
Shu Xuefeng
Publication year - 2015
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.41896
Subject(s) - nanoindentation , materials science , composite material , strain rate , elastic modulus , strain (injury) , indentation , creep , modulus , medicine
This study aims to investigate the effects of strain rate on polymethyl methacrylate (PMMA) nanoindentation measurements. Nanoindentation experiments were used to characterize the mechanical properties of PMMA. A wide range of strain rates were employed to examine strain rate sensitivity of PMMA. The test results indicate that the elastic modulus and hardness of PMMA are strain‐rate‐dependent. In addition, both the elastic modulus and hardness of PMMA exhibit increases with increasing strain rate. However, the elastic modulus became a stable value until strain‐rate of 0.2 s −1 . Creep behavior of PMMA under the condition of high strain rate is more obvious than that experience a low strain rate. Moreover, the effects of strain rate on the PMMA nanomechanical properties are detailed analyzed by discussing each stage of the indentation process. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41896.