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Finite element modeling of nanoindentation response of elastic fiber-matrix composites

Published online by Cambridge University Press:  26 July 2018

Pengfei Duan Open the ORCID record for Pengfei Duan [Opens in a new window] ,
Yuqing Xia ,
Steve Bull  and
Jinju Chen
Pengfei Duan
Affiliation:
School of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K.
Yuqing Xia
Affiliation:
School of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K.
Steve Bull
Affiliation:
School of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K.
Jinju Chen*
Affiliation:
School of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K.
*
a)Address all correspondence to this author. e-mail: Jinju.chen@ncl.ac.uk
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Abstract

A thorough investigation of nanoindentation response of fiber/matrix composites by using a Berkovich indenter and its equivalent conical counterpart was carried out. Three-dimensional finite element models were developed to study how fiber orientations and the axial distance between the fiber and nanoindenter affect the nanoindentation response of fiber/matrix composites. This demonstrates that the indenter geometry and its orientation have little effect on the nanoindentation response when the fiber is horizontally aligned to the surface. However, when the fiber is vertically embedded in the matrix, the apparent modulus measured by using the Berkovich indenter (depending on the indenter orientation) can be significantly different from its conical counterpart. The results demonstrate that when the ratio of fiber-to-indenter distance over fiber diameter is relatively small, nanoindentation response strongly depends on fiber orientation and distance between fiber and indenter as well as indenter geometry.

Keywords

compositefibernanoindentation
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 17 , 14 September 2018 , pp. 2494 - 2503
Copyright
Copyright © Materials Research Society 2018 

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