Atomistic simulations are employed to investigate the dynamics of shock-induced bubble collapse in water. Two types bubbles (an empty and a filled with N2 gas) water considered this study. Apart from manifestation rise temperature pressure due implosion energy released upon collapse; distinct differences response could be observed for case that gas. It is mechanism associated dissociation as well time taken changed introduction gas within bubble. Numerous new chemical species also reacts...

The effect of temperature on the void nucleation and growth is studied using molecular dynamics (MD) code LAMMPS (Large-Scale Atomic/Molecular Massively Parallel Simulator). Single crystal copper triaxially expanded at 5 × 109 s−1 strain rate keeping constant. It shown that voids these atomistic scales follows a macroscopic (NAG) model. As increases there steady decrease in thresholds. melting point approached, double-dip pressure–time profile observed. Analysis this shows first minimum...

Quasi-static (0.0033 s−1) and dynamic (103 compression experiments were performed on single crystal copper along ⟨100⟩ ⟨110⟩ directions best-fit parameters for the Johnson-Cook (JC) material model, which is an important input to hydrodynamic simulations shock induced fracture, have been obtained. The deformation of direction showed high yield strength, more strain hardening, less rate sensitivity as compared direction. Although JC model at macro-scale easy apply describes a general response...

High velocity impact of copper plates using molecular dynamics has been performed to study the spallation single crystal at velocities 1100 and 1000 m s−1. The code LAMMPS (Large-Scale Atomic/Molecular Massively Parallel Simulator) with embedded atom method potential is used for this study. It found that an s−1, nucleation growth multiple voids take place which lead material. For s−1 in ⟨1 0 0⟩ direction, material does not undergo but gives a spall-like signal free surface target. We show...

A multi-scale model has been developed to generate and validate spallation (dynamic fracture) parameters for metallic single crystals. The uses Molecular Dynamic (MD) simulations at the atomic scales obtain a dynamic fracture called Nucleation Growth (NAG) model. obtained from MD are then used describe nucleation growth of voids in macroscopic hydrodynamic material impact spallation. spall strength thickness have earlier computed compared with experimental results crystal copper (Cu),...

We employ molecular dynamics simulations to investigate the role of temperature on evolution voids in single crystal iron. simulate isotropic tension iron at a constant strain rate with range 300–1200 K. find that number is highest 1200 K comparison 300 indicating high nucleation events temperatures. The growth K, rapid overall void volume fraction and occur earlier time damage material individual evolves many discrete jumps due coalescence voids. dislocation density

We employ molecular dynamics simulations to investigate the evolution of {101¯2} twinning in single-crystal Ti under shock loading. The compression applied perpendicular c-axis leads activation twins Ti. find twin variant for each case loading conditions follows Schmid criterion. However, time variants is not same even with equal factor. and dominance do depend on High nucleation events low overall volume fraction occur where two conjugate pairs activate while high only one pair activate....

To attain maximum benefits of the demographic dividend which India can enjoy due to its huge working-age pollution, it is crucial have a highly educated and skilled labour force. In this context, current analysis focuses on understanding potential impact education nation's economic well-being. The study attempts examine relationship between growth using time-series data from period 1980-81 2019-20. dependent variable Real GDP per capita, while independent variables include total force, gross...

Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation S. Rawat, V. M. Chavan, Warrier, Chaturvedi, Sharma, R. J. Patel; Activation of slip systems shape changes during deformation single crystal copper: A molecular dynamics study. AIP Conf. Proc. 5 February 2013; 1512 (1): 84–85. https://doi.org/10.1063/1.4790922 Download citation file: Ris (Zotero) Reference...

Neutron diffraction measurements of the rocking curves were carried out for single crystals copper subjected to dynamic compression at 103/s strain rate. The line broadening is expected be produced by dislocations, and an analysis this gives dislocation density. Dislocation density found increase with pressure.

An understanding of nucleation, growth and coalescence voids is required to predict the spall fracture. We employ molecular dynamics simulations investigate effect temperature on nucleation in single crystal copper under triaxial loading condition. find that void density decreases with an increase temperature. The rate diminishes as increases for range 300–1250 K. individual volume fraction evolves discrete jumps due events. overall at 1250 K appears earlier than 300 indicating failure...

We perform molecular dynamics simulations to investigate the void evolution in single-crystal iron deformed under uniaxial, biaxial and triaxial loading conditions. find that density is highest for case while it lowest uniaxial case. The average growth rate individual volume fraction evolves with many discrete jumps due coalescence events, few For cases, shape of most dominant prolate spherical spacing independent voids where lowest, highest. observations manuscript may be useful develop...

Classical molecular dynamics simulations have been performed to investigate the microstructural evolution of single crystal titanium under equal channel angular extrusion process (ECAE). The ECAE loading condition has simulated by constraining deformation along two directions and applying shear one direction. We find that for case where is applied <21¯1¯0> direction, material yields at higher value stress in comparison <011¯0> {101¯1} {101¯2} twins activate direction primarily accommodated...