Electronic Resource
A finite element strategy coupling a gradient-enhanced damage model and cohesive cracks for quasi-brittle materials
| العنوان: | A finite element strategy coupling a gradient-enhanced damage model and cohesive cracks for quasi-brittle materials |
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| المؤلفون: | Universitat Politècnica de Catalunya. Departament de Matemàtica Aplicada III, Universitat Politècnica de Catalunya. LACÀN - Mètodes Numèrics en Ciències Aplicades i Enginyeria, Tamayo Mas, Elena, Rodríguez Ferran, Antonio |
| بيانات النشر: | 2013 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | A new combined strategy to describe failure of quasi-brittle materials is presented thus allowing the complete description of the process, from initiation of damage to crack propagation. For the early stages of the process, and in order to overcome the well-known problems characterising local descriptions of damage (e.g. mesh-dependence), a gradient-enhanced model based on smoothed displacements is employed. In order to deal with material separation, this continuous description is coupled to a cohesive crack when damage parameter exceeds a critical value. Some difficulties may arise when dealing with the transition from regularised damage models to evolving cracks: crack initiation, crack-path direction, energetic equivalence... In this work, a discrete cohesive crack is introduced when the damage parameter exceeds a critical value. On the one hand, and to determine the crack-path direction, the medial axis of the already damaged profile is computed. That is, a geometric tool widely used in the computer graphics field is used here to track the crack surface. Since this technique is exclusively based on the shape of the regularised damage profile, no mesh sensitivity is observed when determining the crack direction. On the other hand, and to define the cohesive law, an energy balance is imposed thus ensuring that the fracture energy not yet dissipated in the damage zone is transferred to the crack. Peer Reviewed Postprint (published version) |
| مصطلحات الفهرس: | Àrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica::Mètodes en elements finits, Numerical analysis--Simulation methods, Cohesive cracks, Continuous-discontinuous strategy, Extended finite element method, Medial surface, Regularisation, Smoothed displacements, Anàlisi numèrica, 65C Probabilistic methods, simulation and stochastic differential equations, Conference report |
| URL: | |
| الاتاحة: | Open access content. Open access content Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es Restricted access - publisher's policy |
| ملاحظة: | 12 p. application/pdf English |
| Other Numbers: | HGF oai:upcommons.upc.edu:2117/22094 Tamayo, E.; Rodriguez, A. A finite element strategy coupling a gradient-enhanced damage model and cohesive cracks for quasi-brittle materials. A: International Conference on Computational Plasticity Fundamentals and Applications. "Computational Plasticity XII: Fundamentals and Applications. Proceedings of the XII International Conference on Computational Plasticity – Fundamentals and Applications Barcelona, Spain3 - 5 September 2013". Barcelona: 2013, p. 376-387. 978-849415315-0 B-19898-2013 1132972832 |
| المصدر المساهم: | UNIV POLITECNICA DE CATALUNYA From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1132972832 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |