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Application and Assessment of Bonora Damage Model for Geometry Transferability, Mesh Sensitivity and Plasticity Effects using MSC Marc
Technical Paper
2014-28-0029
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A new damage model based on the Continuum Damage Model [Ref. 1] has been implemented in MSC Marc. It can simulate three process of damage evolution namely: void generation, growth and coalescence. By deactivating the element when a certain damage value is reached, users can now simulate a whole range of damage process; from micro crack to macro crack growth.
Micromechanical models like continuum damage mechanics (CDM) deal damage and failures as characteristics based on material and not as geometry configuration. These models are analyzed and validated only for simple geometrical configurations like uniaxial tensile bar, rotating beam specimen etc. A detailed assessment of the geometry transferability, mesh sensitivity and plasticity effects has been addressed only in a limited number of works.
In this paper, CDM approach, as proposed by Bonora is used to model and verify ductile damage processes for various stress states (triaxiality), and mesh sizes, thus validating its use across various models used in industries. Some preliminary results comparing MSC Marc results with experimental data are also discussed.
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Authors
Citation
Srikanth, R., "Application and Assessment of Bonora Damage Model for Geometry Transferability, Mesh Sensitivity and Plasticity Effects using MSC Marc," SAE Technical Paper 2014-28-0029, 2014, https://doi.org/10.4271/2014-28-0029.Also In
References
- Bonora N. A Nonlinear CDM Model for Ductile Fracture Engineering Fracture Mechanics 58 1/2 11 28 1997
- de Souza Neto E.A , Perić D. , Owen D.R.J. Computational Methods for Plasticity: Theory and Applications Wiley 2008
- Pirondi A. , Bonora N. Modeling ductile damage under fully reversed cycling Computational Materials Science, Elsevier Science 26 129 41 2003
- Pirondia,* A. , Bonora N. Simulation of failure under cyclic plastic loading by damage models
- Al-Rub Rashid Kamel Abu Material length scales in gradient dependent plasticity / Damage and size effects: Theory and Computation