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Matthew J. Pais


Education

University of Florida                                                                                                                                                                                         Gainesville, FL
Doctor of Philosophy in Mechanical Engineering                                                                                                                                   Graduated December 2011
Master of Science in Mechanical Engineering                                                                                                                                       Graduated December 2009
University of Missouri at Columbia                                                                                                                                                                    Columbia, MO
Bachelor of Science in Mechanical Engineering                                                                                                                                            Graduated May 2007
Minor in Mathematics, Magna Cum Laude, Honors Scholar
  • B.S. Thesis: Hydroxyapatite Reinforced Dental Composites

Experience

Technical Specialist                                                                                                                                                                                      Philadelphia, PA
Dassault Systèmes Simulia Corp.                                                                                                                                                                 May 2011 - Present
  • Created targeted hour training snippets on topics including: Composite modeling, midsurface modeling, solid meshing, XFEM
  • In-depth training on Abaqus functionality including: Abaqus/CAE, Abaqus/Explicit, buckling, contact, composites, element selection, fasteners, fracture mechanics, geometry import and meshing, metal inelasticity, Python scripting
  • On-site client support for the commercial finite element software package Abaqus at an aerospace company
Graduate Research Assistant                                                                                                                                                                           Gainesville, FL
University of Florida                                                                                                                                                                              August 2007 - May 2011
Intern for National and Homeland Security                                                                                                                                                     Idaho Falls, ID
Idaho National Laboratory                                                                                                                                                                    June 2010 - August 2010
  • Created MATLAB code to generate a statistically significant grain microstructure for a polycrystalline material from a mean and standard deviation
  • Modeling a tension testing specimen for calibration of traction-separation relationship between experimental data for use in other Abaqus models
  • Modeling crack initiation and propagation along grain boundaries using surface-to-surface traction-separation relationship based on cohesive crack model with Abaqus
  • Modeling stress fields in a modified compact tension specimen with known displacements
Undergraduate Research Assistant                                                                                                                                                                  Columbia, MO
University of Missouri at Columbia                                                                                                                                                   September 2005 - May 2007
  • Fabrication of high aspect ratio hydroxyapatite nanofibers and hydroxyapatite nanoparticles
  • Fabrication and mechanical testing of novel polymer-based dental composites reinforced with hydroxyapatite nanofibers, hydroxyapatite nanoparticles, silica nanoparticles and silicon carbide nanofibers
  • Fabrication and mechanical testing of PLA/hydroxyapatite nanofiber composites for bone tissue engineering applications
Undergraduate Researcher                                                                                                                                                                                   Rolla, MO
NSF Sponsored Research Experience for Undergraduates                                                                                                                          June 2005 - July 2005
  • Worked with another undergraduate student to design and fabricate a smart child car seat which would alert the installer if the car seat was installed incorrectly

Teaching

Guest Lecture, Finite Element Analysis and Applications                                                                                                                                Gainesville, FL
University of Florida                                                                                                                                                                                                  April 2011
  • Provided a guest lecture for Dr. Nam-Ho Kim to undergraduate students
  • Coordinated playback of a pre-recorded lecture
  • Answered questions from students about finite element modeling procedures including application of boundary conditions, element selection, and mesh generation
Guest Lecture, Finite Element Analysis and Applications                                                                                                                                Gainesville, FL
University of Florida                                                                                                                                                                                              January 2011
  • Provided a guest lecture for Dr. Nam-Ho Kim to undergraduate students
  • Reviewed the course syllabus as well as the goals of the course
  • Introduced concepts such as discretization, elements, nodes, and interpolation
Guest Lecture (PDF), Aircraft Structures I                                                                                                                                                        Gainesville, FL
University of Florida                                                                                                                                                                                           November 2010
  • Provided a guest lecture for Dr. Raphael Haftka to undergraduate students focusing on fatigue crack growth
  • Reviewed basics of fracture mechanics such as correction factor Y for stress intensity factor and calculation of critical crack size
  • Introduced basics of fatigue crack growth, cyclic loading terms, S-N plots, and a brief history of fatigue incidents in aircrafts
  • Introduced Paris model and its limitations
  • Introduced more complicated fatigue model which is valid of full crack growth regime
  • Introduced variable amplitude loading with brief discussion of overloads and underloads
Teaching Assistant, Finite Element Analysis and Applications                                                                                                                         Gainesville, FL
University of Florida                                                                                                                                                                             January 2009 - April 2009
  • Teaching assistant in introductory course to finite element method and applications to undergraduate students
  • Two office hours per week to assist students with finite element theory and software use (Nastran FX)
  • Graded homeworks, exams, and projects
  • Proctored exams

Skills

Advanced
ABAQUS, MATLAB, Nastran, Patran, Microsoft Office

Basic
ANSYS, AutoCAD, CATIA, COMSOL, HyperMesh, ProEngineer/Mechanica

Activities

Completed Fundamentals of Engineering Exam

Memberships: American Society of Mechanical Engineers, American Institute of Aeronautics and Astronautics, National Honors Society, National Society of Collegiate Scholars, Order of the Engineer, Pi Tau Sigma Mechanical Engineering Honors Fraternity, Tau Beta Pi Engineering Honors Society

Honors

Awarded University of Florida Alumni Fellowship

Third in Structures Student Paper Competition at 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

Awarded Best Web Page 2011 - Structural and Multidisciplinary Optimization Group at University of Florida

Publications


Journal Papers

Coppe, A., Pais, M., Haftka, R.T., Kim, N.H. "Using simple crack growth model in predictingremaining useful life," Journal of Aircraft, Vol. 49, No. 6, pp. 1965-1973, 2012.

Pais, M., Viana, F.A.C., Kim, N.H., "Enabling high-order integration of fatigue crack growth withsurrogate model," International Journal of Fatigue, Vol. 43, pp. 150-159, 2012.

Pais, M., Yeralan, S., Davis, T., Kim, N.H. "An exact reanalysis algorithm using incremental Choleskyfactorization and its application to crack growth modeling," International Journal of Numerical Methods in Engineering, Vol. 91, No. 12, pp. 1358-1364, 2012.

Conference Papers

Coppe, A., Pais, M., Kim, N.H. "Identification of equivalent damage growth parameters for variable amplitude loading," Annual Conference of the Prognostics and Health Management Society 2011, Montreal, Quebec, September 2011.

Coppe, A., Pais, M., Haftka, R.T., Kim, N.H. "Equivalent damage growth parameters using a simplified model," ASME 2011 International Design Engineering Technical Conference & Computers and Information in Engineering Conference, Washington DC, August 2011.

Pais, M., Viana, F.A.C., Kim, N.H. "High-order integration of fatigue crack growth using surrogate model," 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Denver, Colorado, April 2011.

Freiling, T., Neth, J.A., Pais, M., Gonzales, J.F., Pinhero, P.J. "Modeling of bismuth embrittlement of a copper substrate," 2011 Materials Research Society Spring Meeting and Exhibit, San Francisco, California, April 2011.

Pais, M., Viana, F.A.C., Kim, N.H. "Surrogate models for high-order integration of fatigue crack growth models," 2011 Graduate Student Council Interdisciplinary Research Conference, Gainesville, Florida, February 2011.

Coppe, A., Pais, M., Kim, N.H., Haftka, R.T. "Identification of equivalent damage growth parameters for general crack geometry," Annual Conference of the Prognostics and Health Management Society 2010, Portland, Oregon, October 2010.

Pais, M., Kim, N.H., Davis, T. "Reanalysis of the extended finite element method for crack initiation and propagation," 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Orlando, Florida, April 2010.

Pais, M., Kim, N.H., Peters, J., "Discussions on modeling weak discontinuities independent of the finite element mesh," 10th US National Congress on Computational Mechanics, Columbus, Ohio, July 2009.

Pais, M., Kim, N.H., "Modeling failure in composite materials with the extended finite element and level set method," 50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Palm Springs, Calfornia, May 2009.