Probing Local Mechanical Properties in Polymer-Ceramic Hybrid Acetabular Sockets Using Spherical Indentation Stress-Strain Protocols

Kim, HN and Mandal, S and Basu, B and Kalidindi, SR (2019) Probing Local Mechanical Properties in Polymer-Ceramic Hybrid Acetabular Sockets Using Spherical Indentation Stress-Strain Protocols. In: Integrating Materials and Manufacturing Innovation, 8 (3). pp. 257-272.

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Abstract

Mechanical properties exhibited by the materials used in biomedical device components for articulating joints play an important role in determining the implant performance. In the fabrication of complex-shaped parts, the thermomechanical history experienced in different locations of the final part can be substantially dissimilar, which may lead to large differences in the local microstructures and properties. In many instances, it is not feasible to evaluate experimentally the local mechanical properties in the as-manufactured bioimplant prototypes using standardized tests, and use this information in refining the manufacturing cycle to develop implants with improved performance. In order to bridge this critical gap between materials development and manufacturing, we explore here the use of recently developed spherical indentation stress-strain analysis protocols for the mechanical characterization of local properties in the as-manufactured biomedical device prototype. More specifically, this paper presents two main advances: (i) extension of spherical indentation stress-strain analysis protocols needed to extract reliable estimates of elastic modulus and indentation yield strength from polymer matrix composite (PMC) samples and (ii) demonstration of the differences in the properties between samples produced specifically for the standard tension tests and the as-fabricated PMC acetabular socket prototype intended for total hip joint replacement applications. The results of the present study revealed large differences in the mean and variance of the measured moduli and indentation yield strengths in the acetabular socket and the tensile specimen. Based on the extensive micro-computed tomography (micro-CT) analysis, an attempt has been made to rationalize the local property differences on the basis of microstructural attributes. © 2019, The Minerals, Metals & Materials Society.

Item Type:	Journal Article
Publication:	Integrating Materials and Manufacturing Innovation
Publisher:	Springer Science and Business Media Deutschland GmbH
Additional Information:	The copyright for this article belongs to Springer Science and Business Media Deutschland GmbH
Keywords:	Computerized tomography; Joint prostheses; Manufacture; Polymeric implants; Spheres; Strain; Tensile strength; Tensile testing; Viscoelasticity; Yield stress, A. polymer matrix composite (PMC); Bioimplants; Mechanical characterizations; Micro computed tomography (micro-CT); Micro CT; Microstructures and properties; Polymer ceramic composite; Spherical indentations, Polymer matrix composites
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	06 Jan 2023 09:47
Last Modified:	06 Jan 2023 09:47
URI:	https://eprints.iisc.ac.in/id/eprint/78837

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