Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 527, Issue 3, Pages 619-624Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2009.08.033
Keywords
Polymer; Indentation size effect; Hardness; Molecular structure
Categories
Funding
- National Science Foundation CAREER [CMMI 0846692]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1102764] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0846692] Funding Source: National Science Foundation
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Size dependent deformation of polymers has been observed by various researchers in various experimental settings including micro beam bending, foams and indentation testing. Here in this article the indentation size effect in polymers is examined which manifests itself in increased hardness at decreasing indentation depths. Based on previously suggested rationale of size dependent deformation and depth dependent hardness model the depth dependent hardness of various polymers are analyzed. It is found that polymers containing aromatic rings in their molecular structure exhibit depth dependent hardness above the micron length scale. For polymers not containing aromatic rings polymers the indentation size effect starts at smaller indentation depths if they are present at all. (c) 2009 Elsevier B.V. All rights reserved.
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