Dynamics of Deformation-to-Fracture Transition Based on Wave Theory
This paper discusses fracture from the viewpoint of wave dynamics derived from a recent field theory. Based on a fundamental physical principle, the field theory describes deformation and fracture on the same basis. It characterizes deformation as a wave phenomenon where the spatiotemporal oscillatory behavior of the displacement field initiated by an external load is transferred through the material as a sinusoidal wave carrying the stress energy. Fracture is characterized as the final stage of deformation where the wave becomes solitary representing strain concentration and stops carrying the stress energy. Fracture always occurs along the strain concentration. The transitional behavior of the wave dynamics can be visualized as a change in the optical interferometric fringe pattern generated by the optical technique known as the Electronic Speckle-Pattern interferometry. Finite element analysis has been conducted to explain the experimentally observed behaviors and explore the mechanism of transition from to fracture.
KeywordsFracture dynamics Deformation dynamics Deformation wave Optical interferometry
- 1.Griffith, A. A. (1920). Philosophical Transactions of the Royal Society A, 221:, 163–198.Google Scholar
- 2.Irwin, G. R. (1948). Fracture dynamics. In Fracturing of metals. Cleveland: American Society for Metals.Google Scholar
- 6.Sasaki, T., Suzuki, H.& Yoshida, S. Evaluation of dynamics deformation behavior of aluminum alloy by electronic speckle pattern interferometry. In: Imaging Methods for Novel Materials and Challenging Applications, 3, Conference Proceedings of Society for Experimental Mechanics Series (pp. 133–139.). New York: Springer.Google Scholar
- 9.Yoshida, S., Muchiar, Muhamad, I., Widiastuti, R., & Kusnowo, A. Optical interferometric technique for deformation analysis. Optics Express, 2, 516–530. (focused issue on “Material testing using optical techniques”).Google Scholar