mechanical modelling of ceramic materials scot swan 23 september 2015
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MECHANICAL MODELLING OFCERAMIC MATERIALS
Scot Swan23 September 2015
Personal Profile - Education
B.S. in physics, University of Utah, 2010 M.S. in Mechanical Engineering, University of Utah,
2012 Advisor: Rebecca Brannon Thesis Title: Incorporation of a General Strain-to-Failure
Fracture Criterion into a Stress-Based Plasticity Model Through a Time-to-Failure Softening Mechanism
Ph.D. in Structural Engineering, University of California, San Diego Advisor: David Benson Withdrew after two years
Ph.D. in Mechanical Engineering, University of Trento Advisors: Andrea Piccolroaz and Davide Bigoni In progress
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Personal Profile - Experience Undergraduate Study (Spring 2009)
“Statistical Perturbation of Material Properties in Uintah”
Sandia National Laboratories (May 2009 – January 2014) Advection verification Vector/Tensor remap reformulation LASLO development (FEM specifically for
shockwaves) Numerical Optimization for determining quasi-
elastic release profile behavior of shocked materials
Development on the constitutive model Kayenta
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Personal Profile – Experience, Cont.
Kayenta is a general three-invariant phenomenological plasticity model developed for use with geological and rock-like engineering materials. Implemented strain-to-failure through time-based
softening Developed and Implemented dual-mode softening Developed and Implemented tensile control for
excessively tensile states on failed materials Increased return algorithm robustness Increased benchmark coverage Provided user support and contributed to
documentation
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Research Objectives
Development of computational tools for the modelling and simulation of the production process of green bodies based on new constitutive theories
Analysis of the criticality of defects, microcracks, and rigid inclusions
Definition of testing protocols for the calibration of material parameters appearing in the above-mentioned mechanical model
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Secondment – EnginSoft Spa
Secondment to EnginSoft in Trento, Italy EnginSoft is a company that provides virtual
prototyping, numerical optimization, and modelling expertise to partners and customers in industry and government.
Expected secondment dates: February 2016 – July 2016
Supervisor: Silvia Di Rosa
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Training Activities
Courses IEEE School of Career Boosting Intro to Large Strain Elasticity Advanced Soft Composite Materials Contact Mechanics Martensitic Micromechanics Extremely Deformable Structures Inverse Problems and FE Model Updating Topics in Constitutive Modelling of Frictional
Materials Introduction to Virtual Prototyping
Attended 17 seminars on related topics
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Green Body Formation – Alumina8
Testing Protocol and Parameterization9
Testing Protocol and Parameterization10
Testing Protocol and Parameterization11
Testing Protocol and Parameterization12
Testing Protocol and Parameterization13
Simulation - Prediction
Same general setup to previous experiments Introduces an inclined
base Boundaries are
displacement-controlled (zero friction)
Compaction stops at 50% of initial volume
Diameter = 30cm (h1+h2)/2=30cm
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Simulation – volumetric plastic strain
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Dissemination
Completed Presentation to advance to the second year Poster at the ENGRES event Presentation at CERMAT2 year-end review Presentation at CERMAT2 Winter School Presentation at the HOTBRICKS workshop
Planned Presentation at the 28th Nordic Seminar on
Computational Mechanics Publications in scientific journals:
Model formulation Numerical optimization for material parameterization
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Outreach
Contributor to the iMechanica community Wrote the linear algebra tutorial “Sundials and
Linear Algebra” Developer of the open-source project Material
Model Laboratory Wrote the wikipedia article about “Lode
Coordinates”
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Future Work and Career Development
Future Work Implement aleatory uncertainty into the powder
compaction model Investigate deformation-induced anisotropy for the
compacted phase Career Development
Attend multiple conferences in the coming year to present my findings, learn about current research, and network
Already accepted to speak at the 28th Nordic Seminar on Computational Mechanics
Publish four articles in scientific journals in the coming year
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Acknowledgement
The authors gratefully acknowledge financial support from theEuropean Union’s Seventh Framework Programme FP7/2007-2013/ under REA grant agreement number PITN-GA-2013-606878-CERMAT2.