The effects of stress concentrators on strength of materials at nanoscale: A molecular dynamics study

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

There is evidence that when at least one spatial dimension of a material component is in the nanometer range, the effects of nanosize stress concentrators (NSCs) such as impurities, inclusions, pores, and cracks are either eliminated or significantly reduced. The aim of the paper is to examine such evidence using atomistic simulation techniques for a crystalline metal and identify the critical dimensions below which the effects of NSCs are minimal or even nonexistent. The preliminary results reported herein show that for Cu single crystals subjected to constant external strain rate, such critical dimensions are larger than about 30 nm. Since atomistic details are crucial in understanding material behavior at such scales, the paper points to the need for multiscale simulations techniques, presently being developed, for identifying critical dimensions and for examining slow strain rates. Based on the results, the paper presents simulation-based explanations why NSCs may be insignificant at nanoscales.

Original languageEnglish (US)
Pages (from-to)352-358
Number of pages7
JournalMechanics Research Communications
Volume33
Issue number3
DOIs
StatePublished - May 2006

Fingerprint

concentrators
Strength of materials
Molecular dynamics
mechanical properties
molecular dynamics
Strain rate
strain rate
simulation
Metals
Single crystals
Impurities
Crystalline materials
Cracks
cracks
inclusions
porosity
impurities
single crystals
metals

Keywords

  • Nano dimensions
  • Nano materials
  • Strength
  • Stress concentrators

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials

Cite this

@article{8b2281d2132b4aae86a22ff54b002a1c,
title = "The effects of stress concentrators on strength of materials at nanoscale: A molecular dynamics study",
abstract = "There is evidence that when at least one spatial dimension of a material component is in the nanometer range, the effects of nanosize stress concentrators (NSCs) such as impurities, inclusions, pores, and cracks are either eliminated or significantly reduced. The aim of the paper is to examine such evidence using atomistic simulation techniques for a crystalline metal and identify the critical dimensions below which the effects of NSCs are minimal or even nonexistent. The preliminary results reported herein show that for Cu single crystals subjected to constant external strain rate, such critical dimensions are larger than about 30 nm. Since atomistic details are crucial in understanding material behavior at such scales, the paper points to the need for multiscale simulations techniques, presently being developed, for identifying critical dimensions and for examining slow strain rates. Based on the results, the paper presents simulation-based explanations why NSCs may be insignificant at nanoscales.",
keywords = "Nano dimensions, Nano materials, Strength, Stress concentrators",
author = "Frantziskonis, {George N} and Deymier, {Pierre A}",
year = "2006",
month = "5",
doi = "10.1016/j.mechrescom.2005.06.011",
language = "English (US)",
volume = "33",
pages = "352--358",
journal = "Mechanics Research Communications",
issn = "0093-6413",
publisher = "Elsevier Limited",
number = "3",

}

TY - JOUR

T1 - The effects of stress concentrators on strength of materials at nanoscale

T2 - A molecular dynamics study

AU - Frantziskonis, George N

AU - Deymier, Pierre A

PY - 2006/5

Y1 - 2006/5

N2 - There is evidence that when at least one spatial dimension of a material component is in the nanometer range, the effects of nanosize stress concentrators (NSCs) such as impurities, inclusions, pores, and cracks are either eliminated or significantly reduced. The aim of the paper is to examine such evidence using atomistic simulation techniques for a crystalline metal and identify the critical dimensions below which the effects of NSCs are minimal or even nonexistent. The preliminary results reported herein show that for Cu single crystals subjected to constant external strain rate, such critical dimensions are larger than about 30 nm. Since atomistic details are crucial in understanding material behavior at such scales, the paper points to the need for multiscale simulations techniques, presently being developed, for identifying critical dimensions and for examining slow strain rates. Based on the results, the paper presents simulation-based explanations why NSCs may be insignificant at nanoscales.

AB - There is evidence that when at least one spatial dimension of a material component is in the nanometer range, the effects of nanosize stress concentrators (NSCs) such as impurities, inclusions, pores, and cracks are either eliminated or significantly reduced. The aim of the paper is to examine such evidence using atomistic simulation techniques for a crystalline metal and identify the critical dimensions below which the effects of NSCs are minimal or even nonexistent. The preliminary results reported herein show that for Cu single crystals subjected to constant external strain rate, such critical dimensions are larger than about 30 nm. Since atomistic details are crucial in understanding material behavior at such scales, the paper points to the need for multiscale simulations techniques, presently being developed, for identifying critical dimensions and for examining slow strain rates. Based on the results, the paper presents simulation-based explanations why NSCs may be insignificant at nanoscales.

KW - Nano dimensions

KW - Nano materials

KW - Strength

KW - Stress concentrators

UR - http://www.scopus.com/inward/record.url?scp=31344447484&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=31344447484&partnerID=8YFLogxK

U2 - 10.1016/j.mechrescom.2005.06.011

DO - 10.1016/j.mechrescom.2005.06.011

M3 - Article

AN - SCOPUS:31344447484

VL - 33

SP - 352

EP - 358

JO - Mechanics Research Communications

JF - Mechanics Research Communications

SN - 0093-6413

IS - 3

ER -