K.T. Ramesh

Johns Hopkins University

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Todd C. Hufnagel

Johns Hopkins University

Kevin J. Hemker

Johns Hopkins University

James W. McCauley

DEVCOM Army Research Laboratory

Justin Wilkerson

Texas A&M University

Jamie Kimberley

New Mexico Institute of Mining and Technology

Q. Wei

University of North Carolina at Charlotte

Matthew Shaeffer

Johns Hopkins University

Laszlo J. Kecskes

Johns Hopkins University

Yulong Li

China Academy of Engineering Physics

James D. Hogan

University of Alberta

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Johns Hopkins University

232

Luxfer Group (United Kingdom)

108

Norsk Hydro (Germany)

107

Johns Hopkins University Applied Physics Laboratory

DEVCOM Army Research Laboratory

Centre National de la Recherche Scientifique

Osservatorio Astronomico di Padova

Lawrence Livermore National Laboratory

Planetary Science Institute

Los Alamos National Laboratory

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Dynamic testing at high strain rates of an ultrafine-grained magnesium alloy processed by ECAP

Materials Science and Engineering A (2009)

Bin Li Shailendra P. Joshi Kellen Cristina Mendes Azevedo E. Ma K.T. Ramesh

Work hardening

Flow stress

Split Hopkinson Pressure Bar

Strain hardening exponent

10.1016/j.msea.2009.03.032

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Citations (102)

Modeling Nanomaterials

Nanomaterials (2009)

K.T. Ramesh

The length scales that are of interest to the mechanics of materials were discussed in Chapter 1. The focus there was on the devices and structures that typified the various length scales, and the intent was to define the range appropriate for nanomaterials. In subsequent chapters, typical mechanics approaches to characterizing and describing nanomaterials were considered. As in any field of science, however, we cannot truly understand nanomaterials unless we can develop mathematical models for them. This chapter focuses on the modeling approaches that are appropriate for nanomaterials.

Nanomaterials

10.1007/978-0-387-09783-1_8

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An enriched continuum model for the design of a hierarchical composite

Scripta Materialia (2007)

Shailendra P. Joshi K.T. Ramesh

Ductility (Earth science)

10.1016/j.scriptamat.2007.06.061

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Citations (39)

Mechanical Properties: Density and Elasticity

Nanomaterials (2009)

K.T. Ramesh

Should nanomaterials have properties that are any different from conventional materials? Since we have defined nanomaterials as materials where some controllable relevant dimension is of the order of 100 nm or less, there should not be a difference in properties unless the property of interest is affected by some size scale. A big part of understanding the properties of nanomaterials will therefore be developing an understanding of the length scales associated with these properties. We will approach this discussion in two parts. First, in this chapter, we will describe the simple mechanical properties of nanomaterials: the density and the linear elastic behavior. Second, in the next chapter, we will discuss the plastic behavior of nanomaterials, where the couplings of deformation mechanisms with size scale are much more complex. The objective of the current chapter is to introduce the concepts behind the coupling of the grain size and other size scales with the mechanical properties through the simple scalar property of density and through the simple linear property of elasticity.

Nanomaterials

Elasticity

10.1007/978-0-387-09783-1_4

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Citations (2)

Spall strength of polycarbonate measured using laser-driven micro-flyer impact experiments

Jacob M. Diamond K.T. Ramesh

Spall

Polycarbonate

10.26226/m.62a9d1ee9deaf4fdb6b3fdcf

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Data-driven uncertainty quantification in computational human head models

Computer Methods in Applied Mechanics and Engineering (2022)

Kshitiz Upadhyay Dimitris G. Giovanis Ahmed Alshareef Andrew K. Knutsen Curtis L. Johnson

Uncertainty Quantification

Surrogate model

Computational model

Kernel (algebra)

10.1016/j.cma.2022.115108

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Citations (12)

Rate effects in the failure strength of extraterrestrial materials

Conference proceedings of the Society for Experimental Mechanics (2011)

Jamie Kimberley K.T. Ramesh O. S. Barnouin

Bar (unit)

Ordinary chondrite

Quasistatic process

10.1007/978-1-4419-9792-0_52

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Nanomaterials

Nanomaterials (2009)

K.T. Ramesh

Nanotechnology demands the ability to control features at the nanoscale (10−9 m), and a variety of techniques have been developed recently that give humanity this ability. From a fundamental science perspective, issues of physics and chemistry must be addressed at these scales. Surface and boundary effects can dominate the response. Many of the classical distinctions between mechanics, materials and physics disappear in this range of length scales, and a new kind of thinking emerges that is commonly called nanoscience (sometimes humorously interpreted as "very little science"). The recent rapid development of nanoscience is the result of a new-found ability to observe and control structure at small length and time scales, coupled with the development of computational capabilities that are most effective at small scales.

Nanomaterials

10.1007/978-0-387-09783-1_1

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Citations (7)

Orientation dependence of the nucleation and growth of partial dislocations and possible twinning mechanisms in aluminum

Journal of the Mechanics and Physics of Solids (2011)

Nitin Daphalapurkar K.T. Ramesh

Nanocrystalline material

Deformation mechanism

10.1016/j.jmps.2011.10.009

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Citations (25)