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.