1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Shock-induced consolidation and spallation of Cu nanopowders
Rent:
Rent this article for
USD
10.1063/1.3675174
/content/aip/journal/jap/111/1/10.1063/1.3675174
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/1/10.1063/1.3675174
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) The unit configuration of the nanoporous structure projected onto (100), consisting of three types of grains denoted as 1–3 (two grains for each type). A–C denote contact points between neighboring grains. (b) The x-t diagram in terms of density for an impact velocity ui  = 1 km s−1. O: unshocked; S: shocked; sp: spall planes.

Image of FIG. 2.
FIG. 2.

(Color online) Free velocity histories, u fs(t) (a); and stress profiles, σ 11(x) (b) for different impact velocities (denoted by the numbers, in km s−1). t = 46.4, 38.4, and 32 ps for ui  = 0.5, 1, and 2 km s−1, respectively.

Image of FIG. 3.
FIG. 3.

(Color online) The atomic configuration at t = 22 ps for ui  = 0.5 km s−1, visualized with Atomeye.17 Color coding is based on local atomic shear strain (a), coordination number or CN (b; atoms with CN = 12 are not shown) and centrosymmetry parameter (c). Shock direction: left → right.

Image of FIG. 4.
FIG. 4.

(Color online) Atomic configuration showing lattice rotation (dashed curves) and disordering (circles), at t = 14.8 ps for ui  = 0.4 km s−1. Shock direction: left → right.

Image of FIG. 5.
FIG. 5.

(Color online) Snapshots of atomic configurations at t = 14.8 ps for different ui , visualized with CN (atoms with CN = 12 are not shown). Shock direction: left → right.

Image of FIG. 6.
FIG. 6.

(Color online) 2D profiles, σ 11(x, z) and T(x, z), at t = 14.8 ps for ui  = 2 km s−1. Shock direction: left → right.

Image of FIG. 7.
FIG. 7.

(Color online) 2D profiles, |σ vM(x, z)| (a; in GPa) and T(x, z) (b; in K) at t = 22 ps for ui  = 0.5 km s−1, overlaid with the grain boundaries (white dots). Shock direction: left → right.

Image of FIG. 8.
FIG. 8.

(Color online) 2D velocity profile ux (x, z) at t = 14.8 ps for ui  = 2 km s−1. ux is corrected for the initial velocity. High velocity spots (e.g., the circled area) are located in the pores. Shock direction: left → right.

Image of FIG. 9.
FIG. 9.

(Color online) Target free surface roughening during and after shock breakout, for ui  = 2 km s−1. The number pairs (e.g., 19.2/3) denote time in ps/surface roughness in Å. The latter is simply defined as the peak-trough value. Shock direction: left → right.

Image of FIG. 10.
FIG. 10.

(Color online) Snapshots of deformation (a) and void nucleation (b) at t = 40 ps for ui  = 1 km s−1, projected along the y-direction. CSP and CN are used for visualization in (a) and (b), respectively. Only under-coordinated atoms with CN ≤ 8 are shown in (b). Shock direction: left → right.

Loading

Article metrics loading...

/content/aip/journal/jap/111/1/10.1063/1.3675174
2012-01-05
2014-04-24
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Shock-induced consolidation and spallation of Cu nanopowders
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/1/10.1063/1.3675174
10.1063/1.3675174
SEARCH_EXPAND_ITEM