caa a22 4500 463214404 CHVBK 20180405153152.0 cr unu---uuuuu 170326e20070301xx s 000 0 eng 10.1007/s00339-006-3799-2 doi (NATIONALLICENCE)springer-10.1007/s00339-006-3799-2 Microscopic spallation mechanisms induced by a pulse laser at the solid-state interface [Elektronische Daten] [H.-Y. Lai, P.-H. Huang, T.-H. Fang] This paper presents a study of the transient behavior of structural dynamics and the associated innovatory microscopic spallation mechanism at the solid-state interface, induced by an incident femtosecond pulse laser. By detailed structural dynamic analysis, using the technique of molecular dynamics simulation, the spallation mechanism at the solid-solid interface is observed. The occurrence of structural spallation is mainly characterized by extraordinary expansion dynamics and tensile stress that induces interior structural void defect coalescence, eventually leading to cracking. The microscopic phenomenon of moderate ductile fracturing at the solid-solid interface is identified. A high strain rate in the order of 109s-1 is observed. Both aforementioned phenomena are analogous to the experimental results of metal-film spallation excited by a pulse laser. Moreover, it is also shown that the critical value of the stain rate is one of the dominant factors that influences the occurrence and mechanism of structural spallation. The results of simulations reveal that the thin-film structure is safe if the strain rate is below certain critical values. The critical damage threshold is evaluated and technical suggestions to avoid interfacial fracture are also presented. Springer-Verlag, 2006 Lai H.-Y Department of Mechanical Engineering, National Cheng-Kung University, 701, Tainan, Taiwan aut Huang P.-H Department of Mechanical Engineering, National Cheng-Kung University, 701, Tainan, Taiwan aut Fang T.-H Institute of Mechanical and Electro-Mechanical Engineering, National Formosa University, 632, Yunlin, Taiwan aut Applied Physics A Springer-Verlag 86/4(2007-03-01), 497-503 0947-8396 86:4<497 2007 86 339 https://doi.org/10.1007/s00339-006-3799-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-006-3799-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lai H.-Y Department of Mechanical Engineering, National Cheng-Kung University, 701, Tainan, Taiwan aut NATIONALLICENCE 700 1- Huang P.-H Department of Mechanical Engineering, National Cheng-Kung University, 701, Tainan, Taiwan aut NATIONALLICENCE 700 1- Fang T.-H Institute of Mechanical and Electro-Mechanical Engineering, National Formosa University, 632, Yunlin, Taiwan aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 86/4(2007-03-01), 497-503 0947-8396 86:4<497 2007 86 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer