INTEMA 05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
artículos
Título:
Determination of the Drucker-Prager parameters of polymers exhibiting pressure- sensitive plastic behaviour by depth sensing indentation.
Autor/es:
R SELTZER; FRONTINI, PATRICIA; ADRIÁN CISILINO; YIU-WING MAI
Revista:
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2011 vol. 53 p. 471 - 478
ISSN:
0020-7403
Resumen:
This paperpresentsamethodtodeterminetheDrucker?Pragerparametersofpressure-dependantelastic-perfectlyplasticpolymericmaterialsbymeansofthedepth-sensingindentationtechnique.Thisis achievedviaaninverseanalysisoftheload?displacementdataresultingfromtwotestsperformedwith Berkovichandsphericaltips.Thewell-posednessandtheeffectiverangeofapplicationoftheproposedmethodarecarefullyassessedfirst.Thenthemethodistestedfortwoelasto-plasticmaterialswith mildinitialstrain-hardening(HDPEandPMMA),andtheresultsarecomparedtothosemeasuredusing conventionaltensileandcompressiontests.Itisfoundthatthepressure-sensitivityindicescanbeaccuratelypredicted,whiletheyieldstresspredictionsintensionandcompressionfallwithinthenon-linear portionoftheuniaxialstress?straincurves,i.e.,insidetheregionwhereplasticdeformationbegins.
