Inverse analysis for interface fracture toughness of Ti coating film by laser spallation method. (June 2018)

• Record Type: Journal Article
• Authors: Arai, Masahiro; Sato, Yoshitaka; Sugiura, Daisuke; Nishimura, Masaomi; Ito, Hiroaki; Cho, Hideo
• Is Part Of: Advances in engineering software. Volume 120(2018)
• Page Start: 62
• Page End: 67
• Publication Date: 2018-06
• Subjects: Laser ultrasonic waves -- Inverse analysis -- Boundary element method -- Coating film -- Interface fracture toughness; Computer-aided engineering -- Periodicals; Engineering -- Computer programs -- Periodicals; Engineering -- Software -- Periodicals; Periodicals; 620.0028553
• DOI: 10.1016/j.advengsoft.2016.04.003
• Languages: English
• ISSNs: 0965-9978

Abstract

Highlights: 3D-elastic wave can be simulated using axi-symmetric boundary element analyses. Transfer functions were applied to compute dynamic stress intensity factor. Optimization was applied in the inverse analysis to stabilize the solution. Abstract: In the present paper, the interface fracture toughness between a Ti coating film and Al-alloy substrate is evaluated using a laser spallation method and a boundary element method. The fracture toughness can be estimated using inverse analyses by the boundary element method using a transfer function computed from the history of the displacement of the specimen. In the present study, an alternative boundary element program is developed for unsteady state vibration of an axi-symmetric solid body. The mode I interface fracture toughness between the Ti coating film and Al-alloy substrate is confirmed to be about 0.66 MPam 1/2 from the present investigation.