Researches on the three-dimensional size effect of indentation and fracture
Dr. SHE Chongmin
E-mail address: email@example.com
State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Interface delamination and
arching of a ductile thin film on a hard substrate subject to microwedge
indentation were investigated systematically using a three-dimensional finite
element method . A traction ®Cseparation law was introduced to simulate the
cohesion and failure behavior of the interface between the film and the
substrate. The effects of the interface strength, indenter tip length and film
thickness on the onset and growth of interface delamination and film arching
were analyzed[1,2]. It was shown that a two- dimensional to three-dimensional
transition of stress state occurs during indentation, depending on the indenter
length, indentation depth and film thickness and so on. Conditions for using
two-dimensional and three-dimensional models were suggested. A Equivalent
thickness conception based on the equivalent constraint principle was developed
to analyze the 3D effects of crack question[3, 4].
 She C., Zhang Y-W., Zeng K-Y., Engineering Fracture Mechanics. 2009, 76: 2272-2280.
 Chen, L., Yeap, K. B., She, C. M., Liu, G. R., Engineering Structures, 33(12), pp 3269-3278, 2011/12.
 She C., Zhao J., Guo W., International Journal of Fracture 2008. 151, 151®C160.
 Yu P., She C., and Guo W., International Journal of Solids and Structures. 2010, 47: 2123-2130.