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Descripción
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| Poly (L-lactide) is a widely studied biomaterial, currently approved for use in a range of medical devices. Its mechanical properties can be tailored giving the material different crystallinity degrees, and with this different applications. This material, as a polymer, is prone to creep under relative low stresses at ambient temperature. In fact, this is the principal cause of loosening of biodegradable polymeric fixations. Therefore, the need of a reliable mechanical test that considers time dependencies of the material arises in order to predict the viscoelastic behaviour of PLLA components properly. This work explores the potential of instrumented indentation as a suitable technique to measure the complex non-linear time-dependent mechanical properties of PLLA. The sensitivity of elastic modulus, hardness and material creep response to strain rate is investigated. The applicability of the Oliver-Pharr method is also discussed. Likewise, the strain rate influence depending on the crystallinity degree is considered. The results of this study provide important information about PLLA viscoelastic behaviour. | |
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Internacional
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Si |
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Nombre congreso
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Macro2014 |
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Tipo de participación
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960 |
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Lugar del congreso
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Chiang Mai, Thailand |
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Revisores
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Si |
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ISBN o ISSN
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0000-0000 |
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DOI
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Fecha inicio congreso
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06/07/2014 |
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Fecha fin congreso
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11/07/2014 |
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Desde la página
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318 |
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Hasta la página
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318 |
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Título de las actas
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Proceeding Macro2014 |