Numerical simulation of laser-generated ultrasonic by finite element method in the transparent coating-substrate system
-
摘要: 在分析了网格大小和时间步长这两个重要参数和求解稳定性的基础上,采用有限元方法建立了透明薄膜/基底系统的热传导方程和热弹性方程的有限元模型。考虑了薄膜和基底的物理参数随温度的变化,得到了激光照射透明薄膜/基底系统温度场空间分布,由此计算出由热弹效应激发的超声对心波形。结果表明,透明薄膜厚度的增加,会影响到激光激发的对心超声波形;当薄膜厚度增大时,对心超声波形中的双极脉冲波形振幅变大,波形宽度加大。该方法为透明薄膜/基底系统的定量检测和无损评价提供了理论依据。Abstract: The finite element model of the thermal conductive equation and the thermo-elastic equation in the system consisting of a transparent coating and a opaque substrate is established based on the analysis of the stability of solution and two important parameters,meshing size and time step.Taking into account the temperature dependence of material properties,the transient temperature is obtained.The near-axis normal waveforms at the epicenter generated by thermo-elastic effect are obtained.The influence of the coating thickness on the waveform is analyzed.
-
Keywords:
- laser physics /
- ultrasound /
- finite element method /
- coating-substrate system
-
-
[1] SCHNEIDER D,STIEHL E,HAMMER R et al.Nondestructive testing of damage layers in semiconductor materials by surface acoustic waves[J].Proc SPIE,2002,4692:195～211.
[2] ZHANG Sh Y.Laser ultrasound and materials nondestructive evaluation[J].Applied Acoustics,1992,11 (4):1～6.
[3] XU B Q,SHEN Zh H,NIX W et al.Time/frequency analysis of lasergenerated ultrasonic wave in coating/substrate systems[J].Lair Technology,2004,28 (6):609～612 (in Chinese).
[4] CHEN X,XU R Q,SHEN Zh H et al.Reflected laser ultrasonic sensor for testing thickness and its application[J].Laser Technology,2003,27(6):557～559(in Chinese).
[5] McDONALD A F.On the precursor in laser-generated ultrasound waveforms in metals[J].A P L,1990,56 (3),230～232.
[6] ROSE L R F.Point-source representation for laser-generated ultrasound[J].J Acoust Soc Amer,1984,75(3):723～732.
[7] HU W X,QIAN M L.Numerical and experimental study on the ultrasonic displacement field generated by a laser line source[J].Acta Acustica,2000,25 (4):345～350 (in Chinese).
[8] CHENG J C,ZHANG S Y.Quantitative theory for laser-generated Lamb waves in orthotropic thin plates[J].A P L,1999,74 (14):2087～2091.
[9] ROSA G,PSYLLAKI P,OLTRA R et al.Simultaneous laser generation and laser ultrasonic detection of the mechanical breakdown of a coating-substrate interface[J].Ultrasonics,2001,39(5):355～365.
[10] ROSA G,OLTRA R,NADAL M.Evaluation of the coating-substrate adhesion by laser-ultrasonics:modeling and experiments[J].J A P,2002,91 (10):6744～6753.
[11] XU B Q,SHEN Zh H,LU J et al.Numerical simulation of laser-induced transient temperature field in film-substrate system byfinite element method[J].International Journal of Heat and Mass Transfer,2003,46 (25):4963～4968.
[12] XU B Q,SHEN Zh H,NIX W et al.Numerical simulation of laserinduced ultrasonic by finite element method[J].J A P,2004,95(4):2116～2123.
[13] WANG G Q.Practical numerical simulation technology in engineering and practice in ANSYS[M].Xi'an:Publishing Company of Northeast University of Technology,2001.151～164(in Chinese).
-
期刊类型引用(7)
1. 蔡颂，余凡，杨奇，胡沙沙. CO_2脉冲激光雕刻CFRP表面形貌特征研究. 激光技术. 2025(01): 144-150 . 
本站查看
2. 李欣，宋绮梦，张学强，王少乾，张开虎. 激光加工碳纤维增强复合材料及其在航空航天领域应用（特邀）. 中国激光. 2024(04): 9-30 . 百度学术
3. 陈忠安，包彬颖，张广义，潮阳，王玉峰，姚喆赫，焦俊科，张文武. 碳纤维增强聚合物复合材料水导激光切割损伤机理研究. 中国机械工程. 2024(04): 700-710 . 百度学术
4. 黄滔，顾杰，陈寒松，王霄. GFREP和PA66CF30激光透射连接工艺研究. 现代塑料加工应用. 2023(03): 1-4 . 百度学术
5. 简运祺，吴勇华，邵明程，谢明锋，邵火，徐俊飞. 激光参量对CFRP复合材料激光切割质量的影响. 应用激光. 2023(08): 85-93 . 百度学术
6. 杨倩倩，刘源，叶晓慧，强豪，邵星海，曹磊. 激光制备新型石墨烯/银基触头及其性能研究. 激光技术. 2023(06): 766-771 . 本站查看
7. 曹海松，马玉平，彭玉斌，关浩，黄昕伟，单玉强，姚燕生. 超短脉冲激光加工碳纤维复合材料研究进展. 激光与红外. 2023(12): 1810-1821 . 百度学术
其他类型引用(4)
计量
- 文章访问数: 4
- HTML全文浏览量: 0
- PDF下载量: 4
- 被引次数: 11
下载: