Damage to fracture in 3D with XFEM
(2011) Fifth International Conference on Advanced COmputational Methods in ENgineering (ACOMEN 2011) — Location: Liège (14.November.2011)
Files
No attached file found for this publication.
Details
- Authors
- Abstract
- Nowadays, virtual testing is widely used in several sectors (automotive, aeronautics and space, nuclear, ...) as a mean to reduce product development time and cost. A large part of the virtual testing and simulation effort is dedicated to structural integrity assessment of parts. Continuum damage mechanics [1] and fracture mechanics [2] are two sciences that study the failure of materials in different ways. The former describes failure through the gradual reduction of the material properties (elastic or plastic) due to the development of spatially continuous damage, the latter would start from an existing macro-crack or discontinuity and use indicators of stress concentration or distribution to propagate the crack via an appropriate geometric update of the discontinuity. Recent attempts have tried to bridge the gap between damage initiation and crack propagation, using continuum damage mechanics until insertion of a discontinuity. The approach is appealing but it suffers from several difficulties (on top of the traditional difficulties associated with material softening): energetic equivalence, initial crack insertion criterion, initial crack shape and size definition. In this contribution, the level set method and eXtended Finite Element Method are used in combination with basic continuum damage mechanics to easily incorporate a discontinuity and allow for crack propagation. Starting from an uncracked / undamaged part, the method is able to model the whole failure history, from damage initiation to the propagation of a macro-crack. The method is demonstrated on several examples (metals and composites).
- Affiliations
Citations
Minnebo, H., Van Hoof, T., & Lani, F. (2011). Damage to fracture in 3D with XFEM. Fifth International Conference on Advanced COmputational Methods in ENgineering (ACOMEN 2011), Liège. https://hdl.handle.net/2078.5/228521