激光技术Issue(2)：230-235,6.DOI:10.7510/jgjs.issn.1001-3806.2014.02.018
基于应力-位移混合有限元法的激光超声数值模拟
Mixed stress-displacement finite element method for laser-generated ultrasound
摘要
Abstract
In order to study the generation and propagation of laser-generated ultrasound in isotropic semi-infinite aluminum material, a laser-generated ultrasound in an arbitrary elastic semi-infinite medium model was established by using mixed stress-displacement finite element method and perfectly matched layer ( PML ) .The transient wave snapshots and surface normal displacement waveforms in semi-infinite aluminum materials were obtained .The surface normal displacement waveforms were compared with the same geometrical finite element model . The results show that the mixed stress-displacement finite element method can effectively eliminate reflection waves from truncated boundary , and simulate the generation and propagation of ultrasound in semi-infinite solid material accurately .The simulation results provide an effective method for research of the laser-generated ultrasound waves in micro-nanostructure by picosecond or femtosecond laser irradiation .关键词
激光技术/激光超声/理想匹配层/混合有限元/数值模拟Key words
laser technique/laser-generated ultrasonic/perfectly matched layer/mixed finite element method/numerical simulation分类
数理科学引用本文复制引用
许伯强,刘洪凯,徐桂东,徐晨光,李俊敏..基于应力-位移混合有限元法的激光超声数值模拟[J].激光技术,2014,(2):230-235,6.基金项目
国家自然科学基金资助项目（11172114）；江苏省高校自然科学研究资助项目（10KJA140006）；江苏省六大人才高峰资助项目 （）
