Finite element simulation of laser spallation technique

Ming Zhou; Jianping Kan; Lan Cai; Yongkang Zhang; J. Z. Zhou; Zhonghua Shen; X. R. Zhang; Shu-yi Zhang

doi:10.1117/12.482907

12 September 2002 Finite element simulation of laser spallation technique

Ming Zhou, Jianping Kan, Lan Cai, Yongkang Zhang, J. Z. Zhou, Zhonghua Shen, X. R. Zhang, Shu-yi Zhang

Proceedings Volume 4915, Lasers in Material Processing and Manufacturing; (2002) https://doi.org/10.1117/12.482907
Event: Photonics Asia, 2002, Shanghai, China

Abstract

Finite element simulation of measuring the film-matrix interface strength was the most concern of this paper. Instead of in previously reported measurements the experimentally measured free surface velocity, enegry and pessure of laser pulse in the present article allowed definition of the loading conditions in the numerical model. On the basis of theory for laser hypervelocity impact dynamics, experiment was predigested into two relative but non-coupling processes, transient thermal analysis and transient dynamics analysis. In the former, the procedure employed for the solution of thermal equation was the generalized trapezoidal rule. In the latter, the Crank-Nicholson difference time integration method was employed for the solution of wave equation. Based on the experiments, a model for laser-induced film spallation was proposed to study the propagation of stress wave and to evaluate the spall resistance of sputtered films. The analyzed result showed the dynamic adhesive strength of the TiN coating on the 304 stainless steel substrates is 183.64Mpa. It is theoretically proved that the interface stress triggering the film pry-offs was not single superimposition of pressure pulse and reflected tensile pulse, but multi-superimposition of pressure and tensile pulses.

Citation Download Citation

Ming Zhou, Jianping Kan, Lan Cai, Yongkang Zhang, J. Z. Zhou, Zhonghua Shen, X. R. Zhang, and Shu-yi Zhang "Finite element simulation of laser spallation technique", Proc. SPIE 4915, Lasers in Material Processing and Manufacturing, (12 September 2002); https://doi.org/10.1117/12.482907

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available