||CMES: Computer Modeling in Engineering & Sciences, Vol. 91, No. 6, pp. 445-461, 2013
||Full length paper in PDF format. Size =901,030 bytes
||Computational fracture mechanics, finite element method, stress intensity
factor, three-dimensional, iterative method.
||For large-scale fracture mechanics simulation, a partitioned iterative
coupling method is investigated. In this method, an analysis model is decomposed
into two domains, which are analyzed separately. A crack is introduced in one
small domain, whereas the other large domain is a simple elastic body. Problems
concerning fracture mechanics can be treated only in the small domain. In order
to satisfy both geometric compatibility and equilibrium on the domain boundary,
the two domains are analyzed repeatedly using an iterative solution technique. A
benchmark analysis was performed in order to validate the method and evaluate its
computational performance. The computed stress intensity factors were as accurate
as those obtained using the conventional method and the theoretical solution, and
the computational performance was comparable. Based on a benchmark, a cracked
structural component model having three million degrees of freedom was analyzed.
Mode-I, mode-II, and mode-III stress intensity factors were successfully obtained
after several iteration steps.