The microstructural design has an essential effect on the fracture response of brittle materials. We present a stochastic bulk damage formulation to model dynamic brittle fracture. This model is compared with a similar interfacial model for homogeneous and heterogeneous materials. The damage models are rate-dependent, and the corresponding damage evolution includes delay effects. The delay effect provides mesh objectivity with much less computational efforts. A stochastic field is defined for material cohesion and fracture strength to involve microstructure effects in the proposed formulations. The statistical fields are constructed through the Karhunen-Loeve (KL) method. An advanced asynchronous Spacetime Discontinuous Galerkin (aSDG) method is used to discretize the final system of coupled equations. Application of the presented formulation is shown through dynamic fracture simulation of rock under a uniaxial compressive load. The final results show that a stochastic bulk damage model produces more realistic results in comparison with a homogenizes model.
Skip Nav Destination
ASME 2018 International Mechanical Engineering Congress and Exposition
November 9–15, 2018
Pittsburgh, Pennsylvania, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-5214-9
PROCEEDINGS PAPER
Comparison of Interfacial and Continuum Models for Dynamic Fragmentation Analysis
Bahador Bahmani,
Bahador Bahmani
University of Tennessee, Knoxville, Tullahoma, TN
Search for other works by this author on:
Philip Clarke,
Philip Clarke
University of Tennessee, Knoxville, Tullahoma, TN
Search for other works by this author on:
Reza Abedi
Reza Abedi
University of Tennessee, Knoxville, Tullahoma, TN
Search for other works by this author on:
Bahador Bahmani
University of Tennessee, Knoxville, Tullahoma, TN
Philip Clarke
University of Tennessee, Knoxville, Tullahoma, TN
Reza Abedi
University of Tennessee, Knoxville, Tullahoma, TN
Paper No:
IMECE2018-88294, V009T12A015; 9 pages
Published Online:
January 15, 2019
Citation
Bahmani, B, Clarke, P, & Abedi, R. "Comparison of Interfacial and Continuum Models for Dynamic Fragmentation Analysis." Proceedings of the ASME 2018 International Mechanical Engineering Congress and Exposition. Volume 9: Mechanics of Solids, Structures, and Fluids. Pittsburgh, Pennsylvania, USA. November 9–15, 2018. V009T12A015. ASME. https://doi.org/10.1115/IMECE2018-88294
Download citation file:
35
Views
Related Proceedings Papers
Related Articles
Prediction of Ductile-to-Brittle Transition Under Different Strain Rates in Undermatched Welded Joints
J. Pressure Vessel Technol (June,2011)
Influence of Crack Orientation and Crosshead Speed on the Fracture Toughness of PVC Pipe Materials
J. Pressure Vessel Technol (November,2004)
Application of Fracture Mechanics to Failure in Manatee Rib Bone
J Biomech Eng (June,2006)
Related Chapters
Impact Testing
A Quick Guide to API 510 Certified Pressure Vessel Inspector Syllabus
Simulation of the Fracture Network in the Inter-Bed Layered Rock Masses
Geological Engineering: Proceedings of the 1 st International Conference (ICGE 2007)
Meso-Experiment on the Softening and Cracking of Surrounding Rock from a Railway Tunnel under Water Damage Condition
Geological Engineering: Proceedings of the 1 st International Conference (ICGE 2007)