Kink band formation during micro-indentation of oriented polypropylene

J. C.W. Lo; Y. C. Lu; D. M. Shinozaki

doi:10.1016/j.msea.2005.05.112

Kink band formation during micro-indentation of oriented polypropylene

J. C.W. Lo, Y. C. Lu, D. M. Shinozaki

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Displacement controlled deep penetration micro-indentation testing has been applied to uniaxially oriented polypropylene. The load-displacement measurements recorded showed differences from those reported in earlier micro-indentation experiments on isotropic polymers. Examination of the microstructure ahead of the tip face showed that the deformation mechanisms were different from those observed in isotropic material, and varied with orientation of the tip axis relative to the molecular axis of the material. In the case of penetration parallel to the orientation direction, distinct kink bands were observed ahead of the tip face, localized along the axis of penetration. The deformation could be characterized with a modified version of a kink band formation model used for the axial compression of unidirectional fiber composites.

Original language	English
Pages (from-to)	76-86
Number of pages	11
Journal	Materials Science and Engineering: A
Volume	409
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2005.05.112
State	Published - Nov 15 2005

Bibliographical note

Funding Information:
The flat punch micro-indentation experiment was originally based on the early work of Professor J.C.M. Li. The present work has been supported by the Natural Sciences and Engineering Research Council of Canada.

Keywords

Kink band
Micro-indentation
Polypropylene

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2005.05.112

Cite this

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title = "Kink band formation during micro-indentation of oriented polypropylene",

abstract = "Displacement controlled deep penetration micro-indentation testing has been applied to uniaxially oriented polypropylene. The load-displacement measurements recorded showed differences from those reported in earlier micro-indentation experiments on isotropic polymers. Examination of the microstructure ahead of the tip face showed that the deformation mechanisms were different from those observed in isotropic material, and varied with orientation of the tip axis relative to the molecular axis of the material. In the case of penetration parallel to the orientation direction, distinct kink bands were observed ahead of the tip face, localized along the axis of penetration. The deformation could be characterized with a modified version of a kink band formation model used for the axial compression of unidirectional fiber composites.",

keywords = "Kink band, Micro-indentation, Polypropylene",

author = "Lo, {J. C.W.} and Lu, {Y. C.} and Shinozaki, {D. M.}",

note = "Funding Information: The flat punch micro-indentation experiment was originally based on the early work of Professor J.C.M. Li. The present work has been supported by the Natural Sciences and Engineering Research Council of Canada.",

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doi = "10.1016/j.msea.2005.05.112",

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AU - Lo, J. C.W.

AU - Lu, Y. C.

AU - Shinozaki, D. M.

N1 - Funding Information: The flat punch micro-indentation experiment was originally based on the early work of Professor J.C.M. Li. The present work has been supported by the Natural Sciences and Engineering Research Council of Canada.

PY - 2005/11/15

Y1 - 2005/11/15

N2 - Displacement controlled deep penetration micro-indentation testing has been applied to uniaxially oriented polypropylene. The load-displacement measurements recorded showed differences from those reported in earlier micro-indentation experiments on isotropic polymers. Examination of the microstructure ahead of the tip face showed that the deformation mechanisms were different from those observed in isotropic material, and varied with orientation of the tip axis relative to the molecular axis of the material. In the case of penetration parallel to the orientation direction, distinct kink bands were observed ahead of the tip face, localized along the axis of penetration. The deformation could be characterized with a modified version of a kink band formation model used for the axial compression of unidirectional fiber composites.

AB - Displacement controlled deep penetration micro-indentation testing has been applied to uniaxially oriented polypropylene. The load-displacement measurements recorded showed differences from those reported in earlier micro-indentation experiments on isotropic polymers. Examination of the microstructure ahead of the tip face showed that the deformation mechanisms were different from those observed in isotropic material, and varied with orientation of the tip axis relative to the molecular axis of the material. In the case of penetration parallel to the orientation direction, distinct kink bands were observed ahead of the tip face, localized along the axis of penetration. The deformation could be characterized with a modified version of a kink band formation model used for the axial compression of unidirectional fiber composites.

KW - Kink band

KW - Micro-indentation

KW - Polypropylene

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Kink band formation during micro-indentation of oriented polypropylene

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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