Structural response of α-quartz under plate-impact shock compression

Electrical measurements on fused quartz under shock compression

The resistivities of specimens ofSi02 (fused quartz) singly and doubly shocked in the 10-45 and 27-90 GPa ranges, respectively, demonstrate a marked decrease from values of10-0.1 11-m at a single-shock pressure of -40 and a double-shock pressure of 7 4 G Pa. These states correspond to calculated shock temperatures of3300 and -3600 K, respectively. At shock pressures below 36 GPa the measured re...

Electrical and optical measurements on fused quartz under shock compression

The resistivities of specimens of Si02 (fused quartz) singly and doubly shocked in the i0 to 45 and 27 to 90 GPa range, respectively, demonstrate a marked decrease from values of ~10~'m to ~0.1~'m at single shock pressure of ~40 and double shock pressure of ~74 GPa. The shock-induced polarization profiles also show a sudden change of electrical properties of the material at those pressures. The...

A Numerical Study on Aluminum Plate Response under Low Velocity Impact

In the present paper, a numerical study is performed to investigate the response of different plates aluminum alloys subjected to low velocity impact condition. In this regard, the square AA5083-H116 aluminum plates with dimensions 300×300 and 3 mm and 5 mm thick under low velocity impact are modelled, and a mesh convergence study is carried out to decide the appropriate number of elements. In ...

Strength of Polycrystalline Ceramics under Shock Compression

Inelastic response of silicon to shock compression

The elastic and inelastic response of [001] oriented silicon to laser compression has been a topic of considerable discussion for well over a decade, yet there has been little progress in understanding the basic behaviour of this apparently simple material. We present experimental x-ray diffraction data showing complex elastic strain profiles in laser compressed samples on nanosecond timescales...