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The scanning electron-acoustic imaging technique has been used in the characterization of the residual stress field distributions existing in the subsurface in aluminum disks and 20 vol % SiC ( w)/ZrSiO4 multiphase ceramics left by Vicker’s indentation. The experimental results reveal that the distribution areas are the plastic-elastic interchange zones. The electron-acoustic signal generation mechanism in the samples are discussed.

The dynamic response of the 57 vol./vol. % dense spherical silica particle-polyethylene glycol suspension at high pressure was investigated through short pulsed laser induced shock experiments. The measured back free surface velocities by a photonic Doppler velocimetry showed that the shock and the particle velocities decreased while the shock wave transmitted in the shear thickening fluid (STF), from which an equation of state for the STF was obtained. In addition, the peak stress decreased and the absorbed energy increased rapidly with increasing the thickness for a thin layer of the STF, which should be attributed to the impact-jammed behavior through compression of particle matrix, the deformation or crack of the hard-sphere particles, and the volume compression of the particles and the polyethylene glycol.

This work was supported by the Ministry of Science and Technology of China through 973-Project No. 2002CB613307 and the National Natural Science Foundation of China No. 50572113.

This work was supported by the Ministry of Science and Technology of China through 973-Project No. 2002CB613307, the National Natural Science Foundation of China No. 50572113, and Shanghai Commission of Science and Technology No. 05JC14079.

This work was supported by the Ministry of Science and Technology of China through 973-Project under Grant No. 2002CB613307.

This work was supported by the Ministry of Science and Technology of China through 973-Project under Grant No. 2002CB613307.