The combined effect of size, inertia and porosity on the indentation response of ductile materials

Santos, T. dos; Srivastava, Ankit; Rodríguez-Martínez, José A.

Publication:
The combined effect of size, inertia and porosity on the indentation response of ductile materials

dc.affiliation.dpto	UC3M. Departamento de Mecánica de Medios Continuos y Teoría de Estructuras	es
dc.affiliation.grupoinv	UC3M. Grupo de Investigación: Nonlinear Solid Mechanics	es
dc.contributor.author	Santos, T. dos
dc.contributor.author	Srivastava, Ankit
dc.contributor.author	Rodríguez-Martínez, José A.
dc.contributor.funder	European Commission	en
dc.date.accessioned	2021-01-20T07:39:23Z
dc.date.available	2023-02-01T00:00:06Z
dc.date.issued	2021-02
dc.description.abstract	Herein, we present a self-similar cavity expansion model that follows from the work of Cohen and Durban (2013b) to analyze the dynamic indentation response of elasto-plastic porous materials while accounting for the plastic strain gradient induced size effect. The incorporation of the plastic strain gradient induced size effect in the dynamic cavity expansion model for elasto-plastic porous materials is the key novelty of our model. The material hardness predicted using the cavity expansion model for a wide range of indentation depths and speeds is compared against the available experimental results for OFHC copper, for strain rates varying from 10−4 s−1 to 108 s−1. We note that despite several simplifying assumptions, the predictions of our cavity expansion model show a reasonable agreement with the experimentally measured material hardness over a wide range of indentation depths and speeds. In addition, we have also carried out parametric analysis to elucidate the specific roles of indentation speed, size effect and initial porosity, on the material hardness and cavitation fields that develop during the indentation process. In particular, our parametric analysis shows that there exists a critical value of the indentation speed beyond which the contribution of inertial effect becomes extremely important and the material hardness increases rapidly. While the influence of the initial porosity on the material hardness is found to increase with increasing indentation speed and decrease with increasing size effect.	en
dc.description.sponsorship	TdS wishes to acknowledge the support of FAPERGS, Fundação de Amparo ã Pesquisa do Estado do Rio Grande do Sul, grant agreement 19/2551 − 0001054 − 0. JAR-M acknowledges the financial support obtained from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme. Project PURPOSE, grant agreement 758056.	en
dc.format.extent	30
dc.identifier.bibliographicCitation	dos Santos, T., Srivastava, A., Rodríguez-Martínez, J. A. (2021). The combined effect of size, inertia and porosity on the indentation response of ductile materials. Mechanics of Materials, 153, 103674	en
dc.identifier.doi	https://doi.org/10.1016/j.mechmat.2020.103674
dc.identifier.issn	0167-6636
dc.identifier.publicationtitle	Mechanics of Materials	en
dc.identifier.publicationvolume	153
dc.identifier.uri	https://hdl.handle.net/10016/31733
dc.identifier.uxxi	AR/0000026681
dc.language.iso	eng
dc.publisher	Elsevier	en
dc.relation.dataset	https://doi.org/10.21950/F9KFQT
dc.relation.projectID	info:eu-repo/grantAgreement/EC/H2020/758056
dc.rights	© 2020 Elsevier Ltd. All rights reserved	en
dc.rights	Atribución-NoComercial-SinDerivadas 3.0 España
dc.rights.accessRights	open access
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.eciencia	Ingeniería Mecánica	es
dc.subject.other	Dynamic indentation	en
dc.subject.other	Cavity expansion	en
dc.subject.other	Size effect	en
dc.subject.other	Ductile materials	en
dc.subject.other	Porous plasticity	en
dc.title	The combined effect of size, inertia and porosity on the indentation response of ductile materials	en
dc.type	research article	*
dc.type.hasVersion	AM	*
dspace.entity.type	Publication