liu xuan, zhou wei-min, zhao li-jie, et al. Molecular dynamics simulation of ultrashort laser induced back-surface spallation in metallic film[J]. High Power Laser and Particle Beams, 2006, 18.
Citation:
liu xuan, zhou wei-min, zhao li-jie, et al. Molecular dynamics simulation of ultrashort laser induced back-surface spallation in metallic film[J]. High Power Laser and Particle Beams, 2006, 18.
liu xuan, zhou wei-min, zhao li-jie, et al. Molecular dynamics simulation of ultrashort laser induced back-surface spallation in metallic film[J]. High Power Laser and Particle Beams, 2006, 18.
Citation:
liu xuan, zhou wei-min, zhao li-jie, et al. Molecular dynamics simulation of ultrashort laser induced back-surface spallation in metallic film[J]. High Power Laser and Particle Beams, 2006, 18.
National Key Laboratory of Nano/Micro Fabrication Technology,Institute of Micro/Nanometer Science and Technology,Shanghai Jiaotong University,Shanghai 200030,China;
Using molecular dynamics methods combined with two-step radiation heating model, a complete microscopic description of the dynamic progresses involved in laser induced back-surface spallation in metallic film in stress confinement regime is provided. Different from the front-surface ejection with strongly affected mechanical stability of the front-surface by laser heating, the back-surface spallation is a disintegration of cold material. The mechanism of spallation is analyzed as a result of the interaction of the unloading wave and reflected stress wave. The propagation of laser-induced stress wave is also further investigated, and the influences of film thickness on spall thickness as well as the time when spallation begins are predicted.
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