TY - JOUR
T1 - Nanoindentation simulation of PE/POSS under different shapes of indenters
AU - Hu, Enlai
AU - Sun, Yi
AU - Zeng, Fanlin
AU - Qu, Jianmin
PY - 2011/8
Y1 - 2011/8
N2 - In this paper, the nanoindentation simulation on the two models of neat polyethylene (PE) and the polyethylene incorporated with 25wt POSS (POSS-PE) is performed to reveal the reinforcing mechanism of the mechanical properties. The influence of the indenter shapes on nanoindentation is researched by using three different shapes of diamond indenters (cube-corner indenter, cylindrical indenter with spherical tip and cylindrical indenter with flat tip). The molecular mechanics method is adopted to eliminate the temperature effects. Under different indenters, the load-displacement responses, hardnesses (indentation hardness and Martens hardness) and Young's moduli of PE and POSS-PE are obtained. Compared with PE, all the mechanical properties are improved dramatically. Then, we analyze the source of loading drop phenomena and the enhancement mechanism of POSS. Furthermore, the result shows that the different shapes of indenters cause a large impact on indentation hardness, but a little impact on Martens hardness. And Young's modulus of the flat indenter is much larger than that of cube-corner indenter and spherical indenter.
AB - In this paper, the nanoindentation simulation on the two models of neat polyethylene (PE) and the polyethylene incorporated with 25wt POSS (POSS-PE) is performed to reveal the reinforcing mechanism of the mechanical properties. The influence of the indenter shapes on nanoindentation is researched by using three different shapes of diamond indenters (cube-corner indenter, cylindrical indenter with spherical tip and cylindrical indenter with flat tip). The molecular mechanics method is adopted to eliminate the temperature effects. Under different indenters, the load-displacement responses, hardnesses (indentation hardness and Martens hardness) and Young's moduli of PE and POSS-PE are obtained. Compared with PE, all the mechanical properties are improved dramatically. Then, we analyze the source of loading drop phenomena and the enhancement mechanism of POSS. Furthermore, the result shows that the different shapes of indenters cause a large impact on indentation hardness, but a little impact on Martens hardness. And Young's modulus of the flat indenter is much larger than that of cube-corner indenter and spherical indenter.
KW - Young's modulus
KW - hardness
KW - molecular simulation
KW - nanoindentation
KW - shape of indenter
UR - http://www.scopus.com/inward/record.url?scp=80052425633&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80052425633&partnerID=8YFLogxK
U2 - 10.1016/S0894-9166(11)60037-2
DO - 10.1016/S0894-9166(11)60037-2
M3 - Article
AN - SCOPUS:80052425633
SN - 0894-9166
VL - 24
SP - 365
EP - 372
JO - Acta Mechanica Solida Sinica
JF - Acta Mechanica Solida Sinica
IS - 4
ER -