Elastic tensor stiffness coefficients for SLS Nylon 12 under different degrees of densification as measured by ultrasonic technique

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dc.contributor.authorRamos Grez, Jorge
dc.contributor.authorAmado Becker, Antonio
dc.contributor.authorYanez, Maria Jose
dc.contributor.authorVargas, Yolanda
dc.contributor.authorGaete, Luis
dc.date.accessioned2024-01-10T13:12:40Z
dc.date.available2024-01-10T13:12:40Z
dc.date.issued2008
dc.description.abstractPurpose - The purpose of this paper is to present results of an investigation, where the elastic tensor based on the engineering constants of sinterized Nylon 12 is characterized and is modeled considering a transversely isotropic behavior as a function of apparent density (relative mass density).
dc.description.abstractDesign/methodology/approach - The ultrasound propagation velocity measurement through the material in specific directions by means of the pulse transmission method was used, relating the elastic tensor elements to the phase velocity magnitude through Christoffel's equation. In addition conventional uniaxial tensile tests were carried out to validate the used technique. Laser sintering of Nylon 12 powder (Duraform PA) has been performed at different laser energy densities, fabricating cube-shaped coupons as well as dogbone flat coupons, using an SLS 125 former DTM machine.
dc.description.abstractFindings - Correlations for each one of the Young moduli, Shear constants and Poisson's ratios, presenting an exponential behavior as a function of the sintering degree, were generated. In addition, as the apparent density reaches a maximum value of 977 kg/m(3) at an energy density of 0.032 J/mm(2), the material behaves in an almost isotropic form, presenting average values for the Young modulus, Shear modulus and Poisson's ratio corresponding to 2,310 MPa, 803 MPa and 0.408, respectively.
dc.description.abstractResearch limitations/implications - The research is limited only to one type of material within the elastic range. Validation of the Young modulus measured along one direction only is performed using a tensile test machine, due to the difficulties in evaluating Poisson's ratios and Shear moduli using conventional tests.
dc.description.abstractPractical implications - The results presented can be applied to virtual design and evaluating processes such as finite element analysis.
dc.description.abstractOriginality/value - The paper incorporates detailed information regarding the complete elastic characteristics of Nylon 12, including additional measurements of the Shear moduli and Poisson's ratios not studied previously.
dc.fechaingreso.objetodigital2024-05-23
dc.format.extent11 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1108/13552540810907929
dc.identifier.eissn1758-7670
dc.identifier.issn1355-2546
dc.identifier.urihttps://doi.org/10.1108/13552540810907929
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/78215
dc.identifier.wosidWOS:000261405000002
dc.information.autorucIngeniería;Amado-Becker A;S/I;120692
dc.information.autorucIngeniería;Ramos-Grez J;S/I;81538
dc.issue.numero5
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final270
dc.pagina.inicio260
dc.publisherEMERALD GROUP PUBLISHING LTD
dc.revistaRAPID PROTOTYPING JOURNAL
dc.rightsacceso restringido
dc.subjectUltrasonics
dc.subjectSintering
dc.subjectTensors
dc.subjectModulus of elasticity
dc.subjectPolyamides
dc.subjectSINTERED PARTS
dc.subjectMETAL PARTS
dc.subjectLASER
dc.subjectFABRICATION
dc.subjectCOMPOSITES
dc.subjectPARAMETERS
dc.subjectANISOTROPY
dc.subjectCONSTANTS
dc.subjectPOWDERS
dc.subject.ods09 Industry, Innovation and Infrastructure
dc.subject.odspa09 Industria, innovación e infraestructura
dc.titleElastic tensor stiffness coefficients for SLS Nylon 12 under different degrees of densification as measured by ultrasonic technique
dc.typeartículo
dc.volumen14
sipa.codpersvinculados120692
sipa.codpersvinculados81538
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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