Mechanical and vibrational characteristics of functionally graded Cu–Ni nanowire: A molecular dynamics study

Islam, Mahmudul; Thakur, Shajedul Hoque; Mojumder, Satyajit; Amin, Abdullah Al; Islam, Mahbubul

doi:10.1016/j.compositesb.2020.108212

Cited by 38 publications

(14 citation statements)

References 83 publications

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“…On the other hand, FGM nanospheres are modeled by using a slight modification of the source code of the nano-hub tool developed by Thakur el al [31]. This tool's validity has been demonstrated in previous research by Islam et al [32]. The nanospheres used for this study are shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Comparative study on Mechanical characteristics of Functionally graded and Coreshell nanospheres: An Atomistic approach

Malakar¹,

Anan²,

Islam³

et al. 2021

Preprint

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Functionally Graded Material (FGM) is a type of advanced material consisting of two (or more) distinct substances with a constantly changing composition profile. FGM technologies have moved from their traditional use to advanced micro and nanoscale electronics and energy conversion systems along with the advent of nanotechnology. MD simulations are used in this analysis to examine the effect of compressive load on Ag-Au FGM and Coreshell nanospheres. The plasticity process is often started by the nucleation of partial dislocations from the contact surfaces, and these dislocations spread towards the nanosphere's center. Also, we have found the formation of pyramidal-shaped partial dislocations on the pseudo-plastic regime. For a given wt% range of Ag in Au, Coreshell nanospheres have stronger mechanical strength than FGM nanospheres, and we have also observed two distinct patterns in ultimate stress variation for FGM and Coreshell nanospheres. The dislocation analysis suggests a correlation between this stress variation and the Shockley & Hirth partial dislocation density.

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Section: Methodsmentioning

confidence: 99%

Comparative study on Mechanical characteristics of Functionally graded and Coreshell nanospheres: An Atomistic approach

Malakar¹,

Anan²,

Islam³

et al. 2021

Preprint

Self Cite

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“…There are lots of examples in nature, including fish scales and shark teeth, where their unique structure can resist contact and impact forces (Chen et al, 2012). This concept can be used in metallic parts in order to enhance mechanical strength against contact deformation and damage (Suresh, 2001), cracking (Bao and Wang, 1995), and improvement of other mechanical properties (Islam et al, 2020). Sedighi et al (2017) produce a five-layered Ti/HA composite FGM for dental implant applications.…”

Section: The Functional Design Of Fgms In Biomedical Applicationsmentioning

confidence: 99%

Functional Gradient Metallic Biomaterials: Techniques, Current Scenery, and Future Prospects in the Biomedical Field

Shi

Zhou

et al. 2021

Front. Bioeng. Biotechnol.

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Functional gradient materials (FGMs), as a modern group of materials, can provide multiple functions and are able to well mimic the hierarchical and gradient structure of natural systems. Because biomedical implants usually substitute the bone tissues and bone is an organic, natural FGM material, it seems quite reasonable to use the FGM concept in these applications. These FGMs have numerous advantages, including the ability to tailor the desired mechanical and biological response by producing various gradations, such as composition, porosity, and size; mitigating some limitations, such as stress-shielding effects; improving osseointegration; and enhancing electrochemical behavior and wear resistance. Although these are beneficial aspects, there is still a notable lack of comprehensive guidelines and standards. This paper aims to comprehensively review the current scenery of FGM metallic materials in the biomedical field, specifically its dental and orthopedic applications. It also introduces various processing methods, especially additive manufacturing methods that have a substantial impact on FGM production, mentioning its prospects and how FGMs can change the direction of both industry and biomedicine. Any improvement in FGM knowledge and technology can lead to big steps toward its industrialization and most notably for much better implant designs with more biocompatibility and similarity to natural tissues that enhance the quality of life for human beings.

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“…Then the Al atoms are randomly replaced by Mg atoms based on their weight percentages, which is varied in the range of 0 -10%. In a future work, 38 this methodology has been extended further to develop a nanohub tool for building functionally graded materials. 40 In the present study, we consider three different crystallographic orientations as for loading in <0 0 1> direction (<1 0 0> <0 1 0> <0 0 1>) , <1 1 0> direction (<1 1 1> <1 1 2 > < 1 1 0>), and <1 1 1> direction (< 1 1 0> < 1 1 2> <1 1 1>) in our present simulations.…”

Section: Atomistic Simulation Proceduresmentioning

confidence: 99%

“…The modeling method of Al-Mg and Al-Cu alloys for MD study has been adopted from numerous previous works. 4,5,38,39 The effects of these parameters on the dislocation nucleation, propagation mechanism and material properties such as hardness and reduced modulus have been discussed (section 3.1). Then, tensile test simulations have been performed to obtain the mechanical properties such as elastic modulus, yield strength and Poisson's ratio of the alloy material (section 3.2).…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of mechanical properties of aluminum-copper alloys at nanoscale

et al. 2021

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Nanoindentation is a powerful tool capable of providing fundamental insights of material elastic and plastic response at the nanoscale. Alloys at nanoscale are particularly interesting as the local heterogeneity and deformation mechanism revealed by atomistic study offers a better way to understand hardening mechanism to build a stronger material. In this work, nanoindentation in Al-Mg alloys are studied using atomistic simulations to investigate the effects of loading direction, alloying percentages of Mg via dislocation-driven mechanisms. Also, finite element (FE) nanoindentation simulations are performed using MD tensile test results as input parameters for the FE simulations. Material properties, such as hardness and reduced modulus, are computed from both the FE and MD simulations and then compared. Considering the fundamental difference between these two numerical approaches, the FE results obtained from the present study conform fairly with those from MD simulations. This paves a way into finding material properties of alloys with reduced simulation time and cost by using FE instead of MD. The results have been presented as load-displacement analysis, dislocation density, dislocation loops nucleation and propagation, von-Mises stress distribution and surface imprints. The techniques adopted in this paper to incorporate atomistic data into FE simulations can be further extended for finding other mechanical and fracture properties for complex alloy materials.

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Mechanical and vibrational characteristics of functionally graded Cu–Ni nanowire: A molecular dynamics study

Cited by 38 publications

References 83 publications

Comparative study on Mechanical characteristics of Functionally graded and Coreshell nanospheres: An Atomistic approach

Comparative study on Mechanical characteristics of Functionally graded and Coreshell nanospheres: An Atomistic approach

Functional Gradient Metallic Biomaterials: Techniques, Current Scenery, and Future Prospects in the Biomedical Field

Numerical investigation of mechanical properties of aluminum-copper alloys at nanoscale

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