Astani Department Seminar: Dr. Florin Bobaru

September 26, 2011 - Dr. Florin Bobaru, , Mechanical and Materials Engineering, University of Nebraska-Lincoln

Dynamic fracture in nominally brittle materials (in which plastic work is minimal) has significant technological relevance in, for example, designing material systems resistant to impact damage and penetration, cracking of pavement and infrastructure under shock loadings, hydraulic fracturing for enhanced extraction of oil and gas, mining operations, safety of long-term storage of spent nuclear fuel through vitrification, etc. Experiments on dynamic brittle fracture in amorphous materials exhibit a large variety of complex phenomena, including: crack branching, crack-path instabilities, successive branching events, secondary cracking. Modeling and simulation of dynamic fracture in brittle materials has been one of the most challenging problems in computational mechanics. In spite of significant efforts dedicated to this phenomenon over the past several decades (using cohesive-zone models, molecular dynamics methods, etc) fundamental issues and discrepancies between simulation results and experimental observations have remained unsolved.

Category:

Science & Technology

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