MULTI-SCALE MECHANICS LAB,UVA

PUBLICATIONS
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In review or near submission:

Utz, M. and Begley, M.R. (2007) Mechanics of compliant thin films with adsorbed polymer brushes, Journal of the Mechanics and Physics of Solids, submitted March.
Seker, E., Gaskins, J.T., Zhong, J., Bart-Smith, H., Reed, M.L., Kelly, R., Zangari, G. and Begley, M.R. (2007) The effects of annealing prior to dealloying on the mechanical properties of freestanding nanoporous gold structures, Acta Materialia, anticipated submission in April.
Komaragiri, U., Agnew, S.P., Gangloff, R.P. and Begley, M.R. (2007) The role of individual material length-scales in strain gradient plasticity predictions of crack tip behavior, Journal of Applied Mechanics, anticipated submission in April.
Komaragiri, U., Agnew, S.P., Gangloff, R.P. and Begley, M.R. (2007) Crack tip length scales and stress elevation from phenomenological strain gradient plasticity, Journal of the Mechanics and Physics of Solids, anticipated submission in April.
Begley, M.R., Leslie, D. C., Easley, C., Karlinsey, J. and Landers, J. P. (2007) Fluidic capacitance and resistance in microfluidic devices: design of frequency-specific networks, Journal of Applied Mechanics, anticipated submission in April.

In press:

Seker, E., Gaskins, J.T., Zhong, J., Bart-Smith, H., Reed, M.L., Kelly, R., Zangari, G. and Begley, M.R. (2007) The effects of post-fabrication annealing on the mechanical properties of freestanding nanoporous gold structures, Acta Materialia, to appear.
Begley, M.R. and Utz, M. (2007) Multiscale modeling of adsorbed molecules on freestanding microfabricated structures, Journal of Applied Mechanics, to appear.

2006-Present:

Begley, M.R. and Monahan, J. (2007) The mechanical behavior of films and interfaces in microfluidic devices: implications for performance and reliability, CRC Handbook of Microcapillary Electrophoresis, 3rd edition, CRC Press, New York.
Begley, M.R. and Barker, N.S. (2007) Analysis and design of kinked (bent) beam sensors, Journal of Micromechanics and Microengineering, 17, 350-357.
Savkar, A., Murphy, K.D., Lesseman, C., Mackin, T.J. and Begley, M.R. (2007) On the use of dynamic excitation to release stiction-failed microcantilevers, Journal of Microelectromechanical Systems, to appear.
Deshmukh, D.V., Berger, E.J., Begley, M.R. and Komaragiri, U. (2007) Shear lag based Iwan model for frictional contacts, European Journal of Mechanics A, 26, 212-224.
Easley, C.J., Karlinsey, J.M., Leslie, D.C., Begley, M.R. and Landers, J.P. (2006) Directional and frequency-dependent flow control in microfluidic components using passive elastomeric components, Proceedings of the μ-TAS 2006 Conference (10th International Conference on Miniaturized Systems for Chemistry and the Life Sciences), Vol. 2., 1065-1068.
Ro, Y., Begley, M.R., Gangloff, R.P and Agnew, S.P. (2006) Effects of aging on scale-dependent plasticity in aluminum alloys and implications for crack growth, Materials Science and Engineering A, 435-436, 333-342.
Seker, E., Zhong, J., Bart-Smith, H., Begley, M.R., Zangari, G., Kelly, R. and Reed, M.L. (2006) Mitigation of tensile failure in microfabricated nano-porous gold beams, Applied Physics Letters, 89, 133104.
Stanec, J.S., Begley, M.R. and Barker, N.S. (2006) Mechanical properties of dehydrated photoresists for use in RF-MEMS applications, Journal of Micromechanics and Microengineering, 16, 2086-2091.

2000-2005:

Begley, M.R. (2005) The impact of material selection and geometry on multi-functional bilayer sensors and actuators, Journal of Micromechanics and Microengineering, 15, 2379-2388.Begley, M.R., Scott, O.N., Bart-Smith, H., Jones, M.H. and Reed, M.L. (2005) The electro-mechanical response of elastomer membranes coated with ultra-thin metal electrodes, Journal of the Mechanics and Physics of Solids, 53, 257-2578.
Begley, M.R., Utz, M., and Komaragiri, U. (2005) Chemo-mechanical interactions between adsorbed groups and thin elastic films, Journal of the Mechanics and Physics of Solids, 53, 2119-2140.
Begley, M.R. and Bart-Smith, H. (2005) The electro-mechanical response of highly compliant substrates and thin stiff films with periodic cracks, International Journal of Solids and Structures, 42, 5259-5273.
Komaragiri, U., Begley, M.R. and Simmonds, J.G. (2005) The mechanical response of freestanding circular elastic films under point and pressure loads, Journal of Applied Mechanics, 72, 203-212.
Maner, K.C., Begley, M.R. and Oliver, W. C. (2004) Nano-mechanical testing of circular freestanding polymer films with sub-micron thickness, Acta Materialia, 52, 5451-5460.
Scott, O.N., Begley, M.R. , Komaragiri, U. and Mackin, T.J. (2004) Indentation of freestanding circular elastomer films using spherical indenters, Acta Materialia, 52, 4877-4885.
Begley, M.R. and Mackin, T.J. (2004) Spherical indentation of freestanding circular thin films in the membrane regime, Journal of the Mechanics and Physics of Solids, 52, 2005-2023.
Vernon, P.J., Mackin, T.J. and Begley, M.R. (2004) Fatigue testing of polymer membranes, Polymer Composites, 25, 442-450.
Begley, M.R. and Begley, C.J. (2003) Interfacial debonding around rectangular features in multi-layer structures, Special Issue on the Mechanics of Interfaces Interface Science , 11, 319-327.
Jones, E.E., Begley, M.R. and Murphy, K.D. (2003) Adhesion of micro-cantilevers subjected to mechanical point-loading: modeling and experiments, Journal of the Mechanics and Physics of Solids, 51, 1601-1622.
Jones, E.E., Murphy, K.D. and Begley, M.R. (2003) Mechanical measurements of adhesion in micro-cantilevers: transitions in geometry and cyclic energy changes, Special Issue on Nano- and Microscale Experiments, Experimental Mechanics, 43, 280-288.
Begley, M.R. and Ambrico, J.M. (2003) Channel cracking during thermal cycling of thin film multi-layers, Special Issue on Nanoscale Films, International Journal of Fracture, 119(4), 325-338.
Ambrico, J.M. and Begley, M.R. (2003) The role of flaw geometry in thin film delamination from two-dimensional interface flaws located along free edges, Engineering Fracture Mechanics, 70, 1721-1736.
Ambrico, J.M. and Begley, M.R. (2002) The role of initial flaw size and plasticity in adjacent layers in channeling crack growth in thin films, Thin Solid Films, 419, 144-153.
Ambrico, J.M., Jones, E.E. and Begley, M.R. (2002) Cracking in thin multilayers with finite-width and periodic architectures, International Journal of Solids and Structures, 39, 1443-1462.
Begley, M.R. and Ambrico, J.M. (2001) Delamination of thin films from corner and two-dimensional edge flaws, International Journal of Fracture., 112, 205-222.
Ambrico, J.M., Begley, M.R. and Jordan, E.H. (2001) Stress and shape evolution of irregularities in oxide films on elastic-plastic substrates due to thermal cycling and film growth, Acta Materialia, 49, 1577-1588.
Begley, M.R. and Evans, A.G. (2001) Progressive cracking of a multi-layer system upon thermal cycling, Journal of Applied Mechanics, 68, 513-520.
McNulty, J.C., Zok, F.W. and Begley, M.R. (2001) In-plane fracture resistance of a cross-ply fibrous monolith, Journal of the American Ceramic Society, 84[2], 367-375.
Ambrico, J.M. and Begley, M.R. (2001) The role of macroscopic plasticity in fretting fatigue life prediction, International Journal of Fatigue, 23(2), 121-128.
Berger, E.J., Begley, M.R. and Mahajani, M. (2000) Structural dynamic effects on interface response-formulation and simulation under partial slipping conditions, Journal of Applied Mechanics, 67, 785-792.
Ambrico, J.M. and Begley, M.R. (2000) Plasticity in fretting contact, Journal of the Mechanics and Physics of Solids, 48 (11), 2391-2417.
Begley, M.R., Mumm, D.R. Evans, A.G. and Hutchinson, J.W. (2000) Analysis of a wedge impression test for measuring the interface toughness between films/coatings and ductile substrates, Acta Materialia, 48, 3211-3220.

1995-1999:

Begley, M.R. and Hutchinson, (1999) Plasticity in fretting of coated substrates, Engineering Fracture Mechanics, 62, 145.
Begley, M.R., Evans, A.G. and Hutchinson, J.W. (1999) Spherical impression of thin elastic films on elastic-plastic substrates, International Journal of Solids and Structures, 36, 2773.
Begley, M.R. and Hutchinson, J.W., (1998) The mechanics of size-dependent indentation, Journal of the Mechanics and Physics of Solids, 46, 2049.
Begley, M.R., Cox, B.N. and McMeeking, R.M. (1998) Time dependent crack initiation and growth in ceramic matrix composites, ASME Journal of Gas Turbines and Power, 120, 808.
Zok, F.W., Begley, M.R., Steyer, T. and Walls, D.P. (1997) Inelastic deformation of fiber composites containing bridged cracks, Mechanics of Materials, 26, 81.
Begley, M.R., McMeeking, R.M. and Cox, B.N. (1997) Creep crack growth with small-scale bridging in ceramic matrix composites, Acta Metallurgica et Materialia, 43, 3927.
Begley, M.R. (1997) Time dependent behavior of bridged cracks in CMCs: crack growth initiation, International Journal of Solids and Structures, 34, 1035.
Cox, B.N., Marshall, D.B., McMeeking, M.R. and Begley, M.R. (1996) Matrix cracking in ceramic matrix composites with creeping fibers, in IUTAM Symposium on Nonlinear Analysis of Fracture, ed. J.R. Willis, Kluwer Series on Solid Mechanics and its Applications, series ed. G.M. Gladwell (Kluwer Academic, Dordrecht, 1997) pg. 353.
Begley, M.R., Evans, A.G. and McMeeking, R.M. (1995) Creep rupture in ceramic matrix composites with creeping fibers, Journal of the Mechanics and Physics of Solids, 43, 727.
Begley, M.R., Cox, B.N. and McMeeking, R.M. (1995) Time dependent crack growth in ceramic matrix composites with creeping fibers, Acta Metallurgica et Materialia, 43, 3927.
Begley, M.R. and McMeeking, R.M. (1995) Fatigue crack growth with fiber failure in metal matrix composites, Composites Science and Technology, 53, 365.
Begley, M.R. and McMeeking, R.M. (1995) Numerical analysis of fiber bridging and fatigue crack growth in metal matrix composite materials, Materials Science and Engineering, A200, 12-21.

PATENTS PENDING
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Begley, M.R., Landers, J.P., Ferrance, J.P., Huang, L., Jones, M. H., Monahan-Dian, J., Utz, M. and Barker, N.S. “Microdevices for chemical sensing and chemical actuation”, International Patent Application No. PCT/US2006/030127, Filing Date: 01.08.2006.
Landers, J.P., Begley, M.R., Ferrance, J.P., Jones, M.H., Monahan-Dian, J.P., “Electrostatic actuation for management of flow”, International Patent Application No. PCT/US2005/036675, Filing Date: 13.10.2005 (first action received).
Easley, C.J., Karlinsey, J.M., Landers, J.P., Leslie, D. and Begley, M.R., “Passive components for micro-fluidic flow profile shaping and related method thereof”, International Patent Application No. PCT/US2006/032717, Filing Date: 23.08.2006.

PEOPLE/BIOGRAPHIES
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Matthew R. Begley, Associate Professor of Mechanical and Aerospace Engineering, Materials Science and Engineering, Electrical and Computer Engineering

EDUCATION:

Ph.D., Mechanical Engineering 1995 University of California, Santa Barbara

M.S., Mechanical Engineering 1992 The Pennsylvania State University

B.S., Mechanical Engineering 1991 The Pennsylvania State University

PROFESSIONAL EXPERIENCE:

Associate Professor, University of Virginia Aug. 2006- present

Department of Mechanical and Aerospace Engineering

Associate Professor, University of Virginia Aug. 2004-Aug. 2006

Department of Civil Engineering

Assistant Professor, University of Virginia July, 2001 – Aug. 2004

Department of Civil Engineering

Assistant Professor, University of Connecticut 1997 - 2001

Department of Mechanical Engineering

Visiting Assistant Professor, Harvard University Fall, 1998

Division of Engineering and Applied Science

Post-doctoral Fellow, Harvard University 1995 - 1997

Graduate Research Assistant, University of California, Santa Barbara 1992 – 1995

Graduate Teaching Assistant, Pennsylvania State University 1991 – 1992

HONORS AND AWARDS:

NSF Career Award, 2000
Key Speaker, International Conference on Fracture, 2001
University of Virginia Teaching Fellow, 2002-2003
Invited Key Speaker, Advanced Metallization Conference, 2003.
Virginia Engineering Foundation Faculty Fellowship, 2004 – present
Invited Speaker, Gordon Conference on Thin Films, 2006

John T. Gaskins, Ph.D. MAE, December 2009: SRC -Thermo-mechanical behavior of nano-porous materials.
Ling Huang, Ph.D. in Chemistry, May 2007: NSF-SST - Surface functionalization of PDMS for micro-fabricated biochemical sensors
Erkin Seker, Ph.D. in ECE, May 2007: NSF-NIRT - Structure-Property Relations in Nano-porous Metals: Micro-fabrication of freestanding nano-porous metallic structures
Brock Riggs, M.S. in M.S.E, December 2008: NSF- Micro-fabrication of Hybrid Metal/Elastomer Systems for Microfluidics

FUNDING
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Current:

NSF Nanoscale Interdisciplinary Research Team (NIRT): Science and Technology of Nanoporous Metal Films, $1,300,000, 07/01/05-06/30/08, Lead-PI: M.L. Reed (ECE, UVA), Co-PIs: M.R. Begley, R.J. Kelly (MSE, UVA), L. Zangari (MSE, UVA), H. Bart-Smith (MAE, UVA
NSF Sensor Small Team (SST): A New Class of Polymeric Micro-Devices for Chemical Sensing with Integrated Microelectronic/Optical Transduction, $400,000, 09/01/05-08/31/08, Lead PI: M.R. Begley, Co-PIs: J. Landers (Chemistry/Biology), J. Ferrance (Chemistry)

Semi-Conductor Research Corporation (SRC), Thermo-mechanical Behavior of Nano-Porous Materials, $150,000, 01/01/04-12/31/06, PI: M.R. Begley
Carillion Biomedical Institute/UVA Fund for Excellence in Science and Technology (FEST): Development of Bio-chemical Sensors for Lab-on-a-chip Micro-fluidic Technology, $100,000, 09/01/05-08/31/07, Lead PI: M.R. Begley, Co-PIs: J. Landers
AFSOR Controlling Environmental Fatigue in Aerospace Aluminum Alloys by Multi-scale Crack Tip Measurement and Modeling, $375,000, 04/01/03-03/30/06. Lead-PI: S. R. Agnew, Co-PIs: M.R. Begley and R. P. Gangloff.
AFOSR Frictional Damping in Dynamic Contact: Novel Experiments and Physics-Based Models, $328,640, 2/01/02-1/31/05. Lead-PI: E.J. Berger, University of Cincinnati, Co-PIs: M.R. Begley, and T.J. Mackin, UIUC.
NSF/CMS – Research Experiences for Undergraduates (REU): Development of Novel Nanomechanical Tests for Material Characterization, $12,759, 07/01/03-12/30/04, PI: M.R. Begley.
NSF/CMS: Development of Novel In-Situ Tests and Modeling for MEMS Research and Education, $212,050, Lead-PI: Kevin Murphy (UConn); Co-PI: M.R. Begley, 01/01/01-12/31/03
NSF CAREER Award: Determining Time- and Temperature-Dependent Material Properties for Small Components: Integrated Education and Research, $196,144, 7/01/00 -12/30/04.
NSF/DMR Instrumentation Grant: Acquisition of a nano-indenter for use at moderately elevated temperatures, $140,000, Lead-PI: M.R. Begley, Co-PIs: E.H. Jordan and M. Shaw, 6/1/98 – 5/31/99, University of Connecticut.

TEACHING EXPERIENCE
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UVa:

CE231 Strength of Materials: this second year course serves as the introduction to fundamental mechanics concepts for undergraduates in Civil and Mechanical Engineering, and covers stress, strain, energy concepts, etc.
CE323/MAE352 Properties and Behavior of Materials: this third year course covers the fundamental deformation mechanisms controlling the mechanical properties of metals, polymers, wood and concrete, and includes a section on materials selection for design.
CE363 Properties and Behavior of Materials Laboratory: this one-credit lab courses introduces students to the principles of mechanical property measurement and makes connections with deformation mechanisms controlling properties.
CE471 Introduction to Finite Element Analysis: this senior level undergraduate course covers the continuum mechanics background needed for finite element implementation and verification, including energy concepts, beam theories, etc. ANSYS and ABAQUS are used extensively.
CE671 Advanced Finite Element Analysis: this first-year graduate course covers the continuum mechanics background needed for finite element implementation and verification, including PVW concepts, Airy’s stress functions, beam theories, etc. ABAQUS is used extensively.
AM708 Inelastic Behavior of Materials: a graduate course that covers fundamental concepts of plasticity and viscoelasticity, including an introduction to the connections between material microstructure and inelastic behavior.
CE791: Thermo-mechanical Response of Thin Films and Multilayers: a graduate course covering the thermomechanical behavior of multilayer systems, with an emphasis on the reliability of thin films, multi-functional coatings and micro-fabricated devices. Topics include: interface delamination, film cracking, relationships between fabrication and thermomechanical properties (e.g. CTE, modulus, residual stress, toughness, interface adhesion) and experimental characterization of thin films and interfaces. Applications include microelectronic devices, sensors, thermal barrier coatings, and biomedical coatings.

Harvard - ES128: Computational Solid Mechanics: covers the continuum mechanics background needed for finite element implementation and verification, including PVW concepts, Airy’s stress functions, beam theories, etc. ABAQUS is used extensively (Fall 1998).ME205: Introduction to Mechanical Engineering: fundamental concepts in mechanical engineering to provide sophomores with a broad introduction to mechanical engineering.
UConn - ME228: Fracture and Fatigue in Engineering Design: the underlying mechanisms of failure and specific methodologies for predicting component failure.
ME255: Computational Mechanics: concepts of numerical solution techniques and specific methodologies for solving fundamental problems via computer algorithm, covers matrix equation solution techniques, least-squares fitting, numerical integration, finite difference and minimization approaches.
UConn - ME260W: Mechanical Measurements: experiments in instrumentation, vibration, impact, dynamic instability, and signal analysis. (Spring 1998, Spring 1999).
UConn - Advanced Experiments for Senior Design (1/3rd time): design and conduct bending experiments to determine material properties for a ceramic coating and creep properties of common steel. (Fall 1999)
UConn - ME295: Advanced Finite Element Analysis: continuum mechanics background needed for finite element implementation and verification, including PVW concepts, Airy’s stress functions, beam theories, etc. ABAQUS is used extensively. (Spring 2000)
UConn - ME307: Engineering Analysis: an overall introduction to graduate mathematics, ranging from general tensors to solutions to boundary value problems in various coordinate systems (Fall 1998, Fall 1999 On-campus, Fall 1999 On-site at Pratt&Whitney).
UConn - ME369: Theory of Plasticity: this graduate course in plasticity has been revised to include 5 weeks of dislocation behavior and materials science, 5 weeks of flow and deformation theories of plasticity and 5 weeks of numerical implementation of plasticity theories in FEM. (Fall 1998)

Research, Interests and Teaching