Título:
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Depth-sensing indentation applied to polymers: A comparison between standard methods of analysis in relation to the nature of the materials
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Autor/a:
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Giró Paloma, Jessica; Roa Rovira, Joan Josep; Díez Pascual, Ana Maria; Rayón Encinas, Emilio; Flores Aguilar-Amat, Araceli; Martínez López, Monica; Chimenos Ribera, Josep Maria; Fernández Renna, Ana Inés
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Micromecànica i Fiabilitat dels Materials |
Abstract:
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Mechanical data (hardness and elastic modulus) from instrumented indentation testing are
often extracted assuming linear elasticity in the initial portion of the unloading. The
method is nowadays widely accepted as a convenient tool to interpret depth-sensing data,
however it is a matter of controversy when applied to polymer materials due to their time-
dependent behavior. More recently, Loubet and co-workers applied continuous stiffness
measurements (CSM), consisting of superimposing a small oscillation to the quasi-static
component of loading, to the study of the mechanical properties of polymers and proposed
a new model to account for the apparent increase in the contact area detected at the first
stages of contact. The present work offers a comparative study between the Loubet’s model
using CSM and the procedure yielding a single reading from the onset of unloading. A wide
range of thermoplastic polymer materials including glassy and semicrystalline polymers
have been investigated. The most important equations employed for each method are sum-
marized and the advantages and disadvantages of employing one procedure or the other
are discussed. The differences found between the results obtained from both approaches
are discussed in relation to the nature of the polymer material. A comparison between
mechanical data extracted from indentation measurements and from classical dynamic
mechanical analysis is offered. |
Abstract:
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Peer Reviewed |
Materia(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials -Nanoindentation
CSM
Hardness
Elastic modulus -Assaigs de materials -Polímers |
Derechos:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Tipo de documento:
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Artículo - Versión publicada Artículo |
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