A simple element with an embedded strong discontinuity for modeling cohesive cracking of concrete is presented. The element differs from previous elements of the embedded type, in that a consistent stress field is obtained by direct enforcement of stress continuity across the crack. The displacement discontinuity is modeled in an XFEM fashion; however, the discontinuous displacement field is special, allowing for the direct enforcement of stress continuity. This in turn allows for elimination of extra degrees of freedom necessary for describing the crack deformations, thus the element has the same number of freedoms as its continuous basis: CST. The good performance of the element is demonstrated by its ability to simulate threepoint bending of a notched concrete beam. The advantage of the element is its simplicity and the straightforward implementation of it. Handling situations with multiple cracks will not require further evelopments, although this is not demonstrated here.
|Title of host publication||Fracture Mechanics of Concrete and Concrete Structures|
|Volume||Volume 1, Part 3|
|Place of Publication||Seoul, Korea|
|Publisher||Korea Concrete Institute, Seoul|
|Publication status||Published - 2010|
|Event||7th International Conference on Fracture Mechanics of Concrete and Concrete Structures - Jeju, Korea, Republic of|
Duration: 23 May 2010 → 27 May 2010
Conference number: 7
|Conference||7th International Conference on Fracture Mechanics of Concrete and Concrete Structures|
|Country||Korea, Republic of|
|Period||23/05/2010 → 27/05/2010|
- FEM, crack, cohesive, embedded, CST
Olesen, J. F., & Poulsen, P. N. (2010). Stress-compatible embedded cohesive crack in CST element. In Fracture Mechanics of Concrete and Concrete Structures (Vol. Volume 1, Part 3, pp. 586-591). Korea Concrete Institute, Seoul.