An Enhanced Cohesive Crack Element for XFEM using a Double Enriched Displacement Field

Jens Falkenskov Mougaard, Peter Noe Poulsen, Leif Otto Nielsen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Applying the principles of the eXtended Finite ElementMethod a partly cracked cohesive element is developed. The element is based on a double enrichment of the standard displacement field, which allows the element to model equal stresses at the both sides of the crack in the crack-tip element. The formulation is implemented for the 3 node Constant Strain Triangle (CST). A general stress calculation in the cracked elements is presented, the principle is based on an area weighing of the stresses in the cracked elements, which gives a continuous transition from the uncracked respectively the fully cracked element. The performance of the developed element is tested in a Three Point Bending Test, where the partly cracked element gives a good over all structural response. Furthermore the partly cracked element gives results without the often seen zigzag behaviour on the load-deflection curve.
Original languageEnglish
Title of host publicationNew Trends in Fracture Mechanics of Concrete
Volume1
Publication date2007
Pages139-146
Publication statusPublished - 2007
Event6th International Conference on Fracture Mechanics of Concrete and Concrete Structures - Catania, Italy
Duration: 17 Jun 200722 Jun 2007
Conference number: 6

Conference

Conference6th International Conference on Fracture Mechanics of Concrete and Concrete Structures
Number6
CountryItaly
CityCatania
Period17/06/200722/06/2007

Cite this

Mougaard, J. F., Poulsen, P. N., & Nielsen, L. O. (2007). An Enhanced Cohesive Crack Element for XFEM using a Double Enriched Displacement Field. In New Trends in Fracture Mechanics of Concrete (Vol. 1, pp. 139-146)