Meetings & Events

1995 MRS Fall Meeting

November 27–December 1, 1995
Boston, Massachusetts
Meeting Chairs: Michael J. Aziz, Berend T. Jonker, Leslie J. Struble

Symposium Q—Fracture-Instability Dynamics, Scaling, and Ductile Brittle Behavior

Chairs

Jack Mecholsky, University of Florida
Anders Carlsson, Washington University
Robin Blumberg Selinger, NIST
Edwin R. Fuller, Jr., NIST

Symposium Support

Office of Naval Research

Tutorial: FTQ: Introduction to Fracture: The Brittle/Ductile Transition and Dynamical Instabilities in Crack Propagation

Instructors
Anders Carlsson, Washington University (St. Louis)
Michael Marder, University of Texas, Austin

Monday, November 27, 8:30 a.m. - 12:00 p.m.
Staffordshire (W)

  • Introduction to the Brittle/Ductile Transition
  • Short introduction to elasticity theory
  • The Griffith criterion
  • Criteria for brittle vs. ductile behavior at zero temperature:
  • Kelly et al, i. e. shear strength vs. tensile strength
  • Rice-Thomson
  • Schoeck-Rice
  • Recent atomistic simulations
  • Transitions as a function of temperature
  • Characteristic temperature dependences of toughness and strength around transitions
  • Dislocation mobility-based models
  • Statistical mechanics models
  • Shielding effects and fracture toughness; many-dislocation effects.
  • Introduction to dynamical instabilities in brittle crack propagation, and fractals/scaling in fracture
  • Dynamical instabilities in brittle crack propagation
  • Theory of dynamic fracture, and limiting speeds
  • Experimental studies of crack propagation, instability
  • Theoretical approach to instability
  • Simulation studies of dynamical instability
  • Fractals and scaling
  • Experimental studies of fractal/scaling behavior in fracture
  • Bond network models (Duxbury, Herrmann, Curtin, etc.)
    Role of quenched disorder, stochastic dynamics
    Connection to Diffusion Limited Aggregation, Percolation, etc.
  • Other simulation/theory approaches to evolution of fractal/self-affine crack surfaces

This tutorial will provide a concise introduction to the basics of the brittle/ductile transition, dynamical instabilities in brittle crack propagation, and fractals/scaling behavior in fracture. The tutorial is intended to provide the background necessary to understand the invited talks to be given in Symposium Q.

*Invited Paper

SESSION Q1: ATOMIC-SCALE CRACK-TIP PROCESSES
AND BRITTLE/DUCTILE TRANSITION
Chair: Robb M. Thomson
Monday Afternoon, November 27
Staffordshire (W)

1:30 P.M. *Q1.1
MOLECULAR-DYNAMICS SIMULATIONS OF FRACTURE: AN OVERVIEW OF SYSTEM SIZE AND OTHER EFFECTS, Brad Lee Holian, S.J. Zhou, P.S. Lomdahl, N. Grønbech-Jensen, D.M. Beazley, Los Alamos National Laboratory, Los Alamos, NM; and R. Ravelo, University of Texas, El Paso TX.

2:00 P.M. Q1.2
MOLECULAR-DYNAMICS SIMULATIONS OF FRACTURE: THE BRITTLE-DUCTILE CRITERION AND ITS RELATIONSHIP TO DISLOCATION EMISSION AND CRACK BRANCHING, Shujia Zhou, B.L. Holian and P.S. Lomdahl, Los Alamos National Laboratory, Los Alamos, NM.

2:15 P.M. Q1.3
PLAN-VIEW TRANSMISSION ELECTRON MICROSCOPY OF CRACK TIPS IN BULKY MATERIALS, H. Saka, G. Nagaya, T. Sakuishi and S. Abe, Nagoya University, Quantum Engineering, Nagoya, Japan.

^^^Document Error^^^ 2:30 P.M. Q1.4
CLEAVAGE FRACTURE AND THE BRITTLE-TO-DUCTILE TRANSITION OF TUNGSTEN SINGLE CRYSTALS, J. Riedle, P. Gumbsch, H.F. Fischmeister, Max-Planck-Institut für Metallforschung, Stuttgart, Germany; V.G. Glebovsky and V.N. Semenov, Institute of Solid State Physics, Chernogolovka, Russia.

2:45 P.M. Q1.5
DUCTILE-BRITTLE TRANSITION IN TiNi SINGLE CRYSTALS, Juriy I. Chumljakov and Sergey V. Starenchenko, Siberian Physical and Technical Institute, Tomsk, Russia.

3:00 P.M. BREAK

3:30 P.M. *Q1.6
KINETICS OF DISLOCATION EMISSION FROM CRACK TIPS IN BRITTLE-DUCTILE TRANSITIONS OF CLEAVAGE FRACTURE, A.S. Argon, G. Xu. Massachusetts Institute of Technology, Department of Mechanical Engineering, Cambridge, MA; and M. Ortiz, Brown University, Providence, RI.

4:00 P.M. *Q1.7
COOPERATIVE DISLOCATION GENERATION AND THE BRITTLE-DUCTILE TRANSITION, M. Khantha, D.P. Dope and V. Vitek, University of Pennsylvania, Department of Materials Science and Engineering, Philadelphia, PA.

4:30 P.M. Q1.8
EFFECTS OF EXTERNALLY GENERATED DISLOCATIONS ON THE TOUGHNESS OF CRYSTALS AND INTERFACES, Sinisa Dj. Mesarovic, Harvard University, Department of Applied Sciences, Cambridge, MA.

4:45 P.M. Q1.9
STRESS-ASSISTED KOSTERLITZ-THOULESS DISLOCATION NUCLEATION: A SECOND-ORDER PHASE TRANSITION, Robin L. Blumberg Selinger, National Institute of Standards and Technology, Materials Science and Engineering Laboratory, Gaithersburg, MD.

SESSION Q2: BRITTLE/DUCTILE BEHAVIOR:
SURFACE EFFECTS/CHEMICAL EMBRITTLEMENT
Chair: Anders Carlsson
Tuesday Morning, November 28
Staffordshire (W)

9:00 A.M. *Q2.1
EFFECTS OF SURFACE STRESS ON THE DUCTILE-BRITTLE BEHAVIOR OF SOLIDS, K. Sieradzki, ARizona State University, Department of Mechanical and Aerospace Engineering, Tempe, AZ; and R.C. Cammarata, The Johns Hopkins University, Department of Materials Science and Engineering, Baltimore, MD.

9:30 A.M. Q2.2
ON NANO-CRACK NUCLEATION AND PROPAGATION MECHANISMS OF Fe3Al INTERMETALLICS, Scott X. Mao, Harvard University, Division of Applied Sciences, Cambridge, MA.

9:45 A.M. Q2.3
CLEAVAGE DECOHESION AND SHEAR PROCESSES IN NiAl AND FeAl INTERMETALLIC COMPOUNDS: FIRST-PRINCIPLES TOTAL ENERGY CALCULATIONS, N.I. Medvedeva, D.L. Novikov, O.N. Mryasov, A.J. Freeman, Northwestern University, Department of Physics and Astronomy, Evanston, IL; and Y. Gornostyrev, Ural Branch of Russian Academy of Sciences, Institute of Metal Physics, Ekaterinburg, Russia.

10:00 A.M. Q2.4
CRACK GROWTH AND PROPAGATION IN METALLIC ALLOYS, W.C. Morrey and L.T. Wille, Florida Atlantic University, Department of Physics, Boca Raton, FL.

10:15 A.M. BREAK

10:45 A.M. Q2.5
IN-SITU ATOMIC FORCE AND SCANNING ELECTRON MICROSCOPY OF CORROSION AND FATIGUE OF AN ALUMINUM-COPPER ALLOY, K. Kowal, J. DeLuccia, J.Y. Josefowicz, C. Laird and G.C. Farrington, University of Pennsylvania, Department of Materials Science and Engineering, Philadelphia, PA.

11:00 A.M. Q2.6
OXYGEN-INDUCED BRITTLE-INTERGRANULAR FRACTURE OF A HIGH-STRENGTH Cu-Be ALLOY, Ranjani C. Muthiah, C.J. McMahon Jr., University of Pennsylvania, Department of Materials Science and Engineering, Philadelphia, PA; and Amitava Guha, Brush Wellman Inc., Cleveland, OH.

11:15 A.M. Q2.7
EFFECTS OF BORON AND SULFUR ON THE CLEAVAGE FRACTURE IN Ni3Al: A FIRST-PRINCIPLES APPROACH, S.N. Sun, N.Kioussis, California State University, Department of Physics and Astronomy, Northridge, CA; and Mikael Ciftan, U.S. Army Research Office, Physics Division, Research Triangle Park, NC.

11:30 A.M. Q2.8
THE LOCALIZED EFFECTS OF Bi ON THE ELECTRONIC STRUCTURE OF EMBRITTLED COPPER GRAIN BOUNDARIES, J. Bruley, V.J. Keast and D.B. Williams, Lehigh University, Department of Materials Science, Bethlehem, PA.

11:45 A.M. Q2.9
EXPERIMENTAL EVIDENCE FOR SULFUR INDUCED EMBRITTLEMENT OF COPPER GRAIN BOUNDARIES, David K. Chan, David H. Lassila, Wayne E. King, University of California, Lawrence Livermore National Laboratory, Chemistry and Materials Science Department, Livermore, CA; and Ernest Baker, U.S. Army, ARDEC, Picatinny, NJ.

SESSION Q3: FRACTURE AT INTERFACES
Chair: John W. Hutchinson
Tuesday Afternoon, November 28
Staffordshire (W)

1:30 P.M. *Q3.1
THE INFLUENCE OF INTERFACES ON THE THERMOMECHANICAL PERFORMANCES OF THIN FILMS AND MULTILAYERS, A.G. Evans, Harvard University, Division of Applied Sciences, Cambridge, MA.

2:00 P.M. Q3.2
FRACTURE PROPERTIES OF NI-SAPPHIRE INTERFACES, James D. Kiely and Dawn A. Bonnell, University of Pennsylvania, Department of Materials Science and Engineering, Philadelphia, PA.

2:15 P.M. *Q3.3
IMPURITY EFFECTS ON INTERFACIAL ADHESION: SIMPLE LESSONS FROM AB INITIO CALCULATIONS, D.J. Srolovitz, T. Hong, J. Raynolds, G.-L. Zhao, University of Michigan, Department of Materials Science and Engineering, Ann Arbor, MI; and J.R. Smith, GM Research and Development Center, Physics Department, Warren, MI.

2:45 P.M. Q3.4
MECHANISM OF DUCTILE RUPTURE IN THE AL/SAPPHIRE SYSTEM ELUCIDATED USING X-RAY TOMOGRAPHIC MICROSCOPY, Wayne E. King, Geoffrey H. Campbell, University of California, Lawrence Livermore National Laboratory, Chemistry and Materials Science Department, Livermore, CA; David L. Haupt, University of California, Lawrence Livermore National Laboratory, Mechanical Engineering Department, Livermore, CA; John H. Kinney, University of California, Lawrence Livermore National Laboratory, Chemistry and Materials Science Department, Livermore, CA; Robert A. Riddle, University of California, Lawrence Livermore National Laboratory, Mechanical Engineering Department, Livermore, CA; and Walter L. Wien, University of California, Lawrence Livermore National Laboratory, Chemistry and Materials Science Department, Livermore, CA.

3:00 P.M. BREAK

3:30 P.M. Q3.5
BRITTLE TO DUCTILE TRANSITION IN INDENTATION FRACTURE MECHANICS, S.J. Burns, University of Rochester, Materials Science Program, Department of Mechanical Engineering, Rochester, NY.

3:45 P.M. Q3.6
ESTIMATING INTERFACE PROPERTIES VIA NANO-INDENTATION: CONTINUUM MODELING AND COMPUTER SIMULATION, Elliott S. Alber, M.I. Baskes, N.R. Moody and L. Medlin, Sandia National Laboratories, Livermore, CA.

4:00 P.M. Q3.7
THERMAL STRESSES ANALYSIS AND SIMULATION OF VOIDS AND FRACTURE AT THE GaAs-CERAMIC (Al2O3 INTERFACE, Nickolaos Strifas and Aris Christou, University of Maryland, Department of Materials and Nuclear Engineering, College Park, MD.

4:15 P.M. Q3.8
MIXED MODE TOUGHNESS OF A THIN DUCTILE LAYER JOINING ELASTIC SOLIDS, Yueguang Wei and John W. Hutchinson, Harvard University, Division of Applied Sciences, Cambridge, MA.

4:30 P.M. Q3.9
INTERFACE CRACKING PHENOMENA IN CONSTRAINED METAL LAYERS, M.Y. He, University of California, Materials Department, Santa Barbara, CA; A.G. Evans and J.W. Hutchinson, Harvard University, Division of Applied Sciences, Cambridge, MA.

4:45 P.M. Q3.10
MEASURING INTERFACE FRACTURE RESISTANCE IN THIN HARD FILMS, Huiyong Liu, Bryan C. Hendrix and Kewei Xu, Xi'an Jiaotong University, State Key Laboratory for Mechanical Behavior of Materials, Xi'an, China.



JOINT SESSION Q4/P9: FRACTURE AND
BRITTLE/DUCTILE BEHAVIOR - I & II
Chairs: Priya Vashishta and Nghi Q. Lam
Wednesday Morning, November 29
Staffordshire (W)

8:30 A.M. *Q4.1/P9.1
INSTABILITY DYNAMICS OF FRACTURE VIA PARALLEL MOLECULAR DYNAMICS, Farid F. Abraham, IBM Almaden Research Center, San Jose, CA.

9:00 A.M. Q4.2/P9.2
DYNAMIC SIMULATION OF CRACK PROPAGATION WITH DISLOCATION EMISSION AND MIGRATION, N. Zacharopoulos, D.J. Srolovitz, University of Michigan, Department of Materials Science and Engineering, Ann Harbor, MI; R.A. LeSar, Los Alamos National Laboratory, Los Alamos, NM; and P.M. Anderson, Ohio State University, Department of Materials Science and Engineering, Colombus, OH.

9:15 A.M. Q4.3/P9.3
MOLECULAR DYNAMIC SIMULATIONS OF DISLOCATION NUCLEATION ON VICINAL SURFACES, J. Kapp and Karl Sieradzki, Arizona State University, Tempe, AZ.

9:30 A.M. *Q4.4/P9.4
DYNAMICS AND MORPHOLOGY OF CRACKS IN SILICON NITRIDE FILMS: A MOLECULAR-DYNAMICS STUDY, Aiichiro Nakano, Rajiv K. Kalia and Priya Vashista, Louisiana State University, Concurrent Computing Laboratory for Materials Simulations, Baton Rouge, LA.

10:00 A.M. BREAK

10:30 A.M. *Q4.5/P9.5
SIGNIFICANT AND INCIDENTAL CHARACTERISTICS OF DISLOCATION CORES IN METALLIC MATERIALS, V. Vitek, University of Pennsylvania, Department of Materials Science and Engineering, Philadelphia, PA.

11:00 A.M. Q4.6/P9.6
SIMULATION OF DISLOCATIONS IN ORDERED Ni3Al BY ATOMIC STIFFNESS MATRIX METHOD, Y.E. Hsu and T.K. Chaki, State University of New York, Department of Mechanical Engineering, Buffalo, NY.

11:15 A.M. Q4.7/P9.7
REPRESENTATION OF FINITE CRACKS BY DISLOCATION PILEUPS: AN APPLICATION TO ATOMISTIC SIMULATION OF FRACTURE, Vijay Shastry and Diana Farkas, Virginia Tech, Department of Materials Science and Engineering, Blacksburg, VA.

11:30 A.M. Q4.8/P9.8
MULTIPLE-SCALE QUASI-CONTINUUM FINITE ELEMENT ANALYSIS OF DEFECTS IN CRYSTALS, E.B. Tadmor, Brown University, Department of Engineering, Providence, RI; M. Ortiz, California Institute of Technology, Graduate Aeronautical Labs, Pasadena, CA; and R. Phillips, Brown University, Department of Engineering, Providence, RI.

11:45 A.M. Q4.9/P9.9
MECHANISM OF THERMALLY ASSISTED CREEP CRACK GROWTH, Leonardo Golubovic and Dorel Moldovan, West Virginia University, Department of Physics, Morgantown, WV.

JOINT SESSION Q5/P10: FRACTURE AND
BRITTLE/DUCTILE BEHAVIOR - III & IV
Chairs: Rajiv K. Kalia and James B. Adams
Wednesday Afternoon, November 29
Staffordshire (W)

1:30 P.M. *Q5.1/P10.1
CRACKS ON INTERFACES, Robb Thomson, National Institute of Standards and Technology, Materials Science and Engineering Laboratory, Gaithersburg, MD.

2:00 P.M. Q5.2/P10.2
SIMULATION OF POLYGONIZATION IN ARRAYS OF LIKE-SIGN DISLOCATIONS, D.B. Barts and A.E. Carlsson, Washington University, Department of Physics, St. Louis, MO.

2:15 P.M. Q5.3/P10.3
LEDGE EFFECTS ON DISLOCATION EMISSION AT A CRACK TIP: A FIRST-PRINCIPLES STUDY, Yu-Min Juan, Harvard University, Division of Applied Sciences, Cambridge, MA; Efthimios Kaxiras, Harvard University, Department of Physics and Division of Applied Sciences, Cambridge, MA; and Yuemin Sun, Harvard University, Division of Applied Sciences, Cambridge, MA.

2:30 P.M. Q5.4/P10.4
SIMULATION OF DYNAMICS OF PUNCHING OF THIN FILMS, K. Kogure, Masao Doyama, M. Miyazaki, K. Tanaka and T. Uzaki, Nishi-Tokyo University, Department of Materials, Yamanashi, Japan.



2:45 P.M. Q5.5/P10.5
FINITE ELEMENT ANALYSIS OF INDENTATION - THE ROLE OF MICRO-LENGTH SCALE, John Y. Shu, University of California, Lawrence Livermore National Laboratory, Chemistry and Materials Science Department, Livermore, CA; and Norman A. Fleck, Cambridge University, Engineering Department, Cambridge, United Kingdom.

3:00 P.M. BREAK

3:30 P.M. *Q5.6/P10.6
MIXED ATOMISTIC/CONTINUUM MODELS OF DEFORMATION IN SOLIDS, Rob Phillips, Brown University, Department of Engineering, Providence, RI.

4:00 P.M. Q5.7/P10.7
GRAIN BOUNDARY DIFFUSION EFFECTS IN POLYCRYSTALLINE MICROSTRUCTURES, Thomas P. Swiler, Elizabeth A. Holm, Sandia National Laboratories, Physical and Joining Metallurgy, Albuquerque, NM; and Craig R. Schardt, University of Florida, Department of Materials Science and Engineering, Gainesville, FL.

4:15 P.M. Q5.8/P10.8
EFFECT OF CRACK BLUNTING ON SUBSEQUENT CRACK PROPAGATION, J. Schiøtz, A.E. Carlsson, Washington University, Department of Physics, St. Louis, MO; and Robb Thomson, National Institutes of Standards and Technology, Gaithersburg, MD.

4:30 P.M. Q5.9/P10.9
ENERGETICS OF CRYSTALLINE SLIP: IMPROVEMENTS TO THE PEIERLS FRAMEWORK, R. Miller, R. Phillips, Brown University, Department of Engineering, Providence, RI; and M. Ortiz, California Institute of Technology, Graduate Aeronautical Labs, Pasadena, CA.

4:45 P.M. Q5.10/P10.10
THE STRUCTURE AND ENERGETICS OF DISLOCATION LOOPS, Vijay B. Shenoy and Rob Phillips, Brown University, Department of Engineering, Providence, RI.

SESSION Q6: COMPOSITES/CERAMICS
Chair: Edwin R. Fuller Jr.
Thursday Morning, November 30
Staffordshire (W)

8:30 A.M. Q6.1
CRITERIA FOR PROGRESSIVE INTERFACIAL DEBONDING WITH FRICTION IN FIBER-REINFORCED CERAMIC COMPOSITES, Chun-Hway Hsueh, Oak Ridge National Laboratory, Metals and Ceramics Division, Oak Ridge, TN.

8:45 A.M. Q6.2
R-CURVE RESPONSE OF WHISKER-REINFORCED AND SELF-REINFORCED CERAMIC MATERIALS: MICROSTRUCTURAL INFLUENCE, Ellen Y. Sun, Paul F. Becher, Chun-Hway Hsueh and Kathleen B. Alexander, Oak Ridge National Laboratory, Metals and Ceramics Division, Oak Ridge, TN.

9:00 A.M. *Q6.3
HIGH STRENGTH POLYMER/GLASS FIBER COMPOSITES FOR FLUID CONTAINMENT, L. Monette, Exxon Research and Engineering, Annandale, NJ.

9:30 A.M. Q6.4
ELASTICITY AND FRACTURE IN PARTICULATE COMPOSITES WITH STRONG AND DEGRADED INTERFACES, A. Lekatou, S.E. Faidi, S.B. Lyon and R.C. Newman, UMIST, Corrosion and Protection Centre, Manchester, United Kingdom.

9:45 A.M. Q6.5
THE NON-LINEAR BEHAVIOR OF A MODEL RELATED TO THE FRACTURE OF COMPOSITE MATERIALS, Alberto Varone, Franco Meloni, University of Cagliari, INFM - Physics Department, Cagliari, Italy; Francesco Aymerich and Francesco Ginesu, University of Cagliari, Mechanical Engineering Department, Cagliari, Italy.

10:00 A.M. BREAK

10:30 A.M. *Q6.6
FRACTURE OF CERAMICS: COMPARISON OF MODELS AND EXPERIMENTS, Stephen Freiman, National Institutes of Standards and Technology. Ceramics Division, Gaithersburg, France.

11:00 A.M. Q6.7
DYNAMIC PROBES OF DEFORMATION, FRACTURE, AND WEAR DURING TRIBOLOGICAL LOADING OF MATERIALS, J.T. Dickinson and S.C. Langford, Washington State University, Department of Physics, Pullman, WA.

11:15 A.M. Q6.8
INTERFACIAL FRACTURE BETWEEN BORON NITRIDE AND SILICON NITRIDE AND ITS APPLICATIONS TO THE FAILURE BEHAVIOR OF FIBROUS MONOLITHIC CERAMICS, Desiderio Kovar, G. Allen Brady, John W. Halloran, University of Michigan, Department of Materials Science and Engineering, Ann Arbor, MI; and Michael D. Thouless, University of Michigan, Department of Mechanical Engineering and Applied Mechanics, Ann Arbor, MI.

11:30 A.M. Q6.9
HIGH TOUGHNESS ALUMINA/ALUMINATE: THE ROLE OF HETERO-INTERFACES, Manuel E. Brito, Masaki Yasuoka and Shuzo Kanzaki, National Industrial Research Institute of Nagoya, Ceramics Science Department, Nagoya, Japan.

11:45 A.M. Q6.10
EFFECT OF AGGREGATE CONTENT ON FRACTURE BEHAVIORS OF CONCRETE, Yunping Xi, Felix E. Amparano, Drexel University, Philadelphia, PA; and Zongjin Li, The Hong Kong University of Science and Technology, Kowloon, Hong Kong.

SESSION Q7: DYNAMICAL INSTABILITIES:
FRACTURE OF SILICON/SILICA
Chair: Robin L. Blumberg Selinger
Thursday Afternoon, November 30
Staffordshire (W)

1:30 P.M. *Q7.1
ATOMIC EFFECTS IN BRITTLE FRACTURE, Michael P. Marder, The University of Texas at Austin, Department of Physics and Center for Nonlinear Dynamics, Austin, TX.

2:00 P.M. *Q7.2
STRUCTURAL RECONSTRUCTION DURING MD FRACTURE, Joseph H. Simmons, Rajiv K. Bendale and John J. Mecholsky Jr., University of Florida, Department of Materials Science and Engineering, Gainesville, FL.

2:30 P.M. Q7.3
STABILITY ANALYSIS OF CRACKS PROPAGATING IN THREE DIMENSIONAL SOLIDS, H. Larralde, A.A. Al-Falou and R.C. Ball, University of Cambridge, Department of Physics, Cavendish Laboratory, Cambridge, United Kingdom.

2:45 P.M. Q7.4
SIMULATION OF FRACTURE IN CRYSTALLINE AND AMORPHOUS SILICON, F. Cleri, ENEA, Roma, Italy; D. Wolf and S.R. Phillpot, Argonne National Laboratory, Materials Science Division, Argonne, IL; S. Yip, Massachusetts Institute of Technology, Cambridge, MA.

3:00 P.M. BREAK

3:30 P.M. Q7.5
A MINIMAL MODEL FOR CRACK PROPAGATION IN AMORPHOUS MATERIALS, R. Blumenfeld, Los Alamos National Laboratory, Theoretical Division and Center for Nonlinear Studies, Los Alamos, NM.

3:45 P.M. Q7.6
THE ROLES OF ATOMIC-SCALE DYNAMICS AND STRUCTURE IN THE BRITTLE FRACTURE OF SILICA, Thomas P. Swiler, Sandia National Laboratories, Physical and Joining Metallurgy, Albuquerque, NM; Joseph H. Simmons and Tansen Varghese, University of Florida, Department of Materials Science and Engineering, Gainesville, FL.

4:00 P.M. *Q7.7
ON THE RESPONSE OF DYNAMIC CRACKS TO INCREASING OVERLOAD, Peter Gumbsch, Max-Planck-Institut für Metallforschung, Institut für Werkstoffwissenschaft, Stuttgart, Germany.

4:30 P.M. Q7.8
TEMPORAL INSTABILITIES (DISSIPATIVE STRUCTURES) IN CYCLICALLY DEFORMED METALLIC ALLOYS, M.V. Glazov, University of Pennsylvania, Department of Materials Science and Engineering, Philadelphia, PA; D.R. Williams, Cornell University, Department of Mechanical Engineering, Ithaca, NY; and C. Laird, University of Pennsylvania, Department of Materials Science and Engineering, Philadelphia.

4:45 P.M. Q7.9
ON FINE STRUCTURE INSTABILITY PHENOMENA ON THE SURFACE OF SCHALLAMACH'S WAVES PROPAGATING ON A RUBBER SAMPLE, A. Koudine and M. Barquins, ESPCI, PMMH, Paris, France.

SESSION Q8: POSTER SESSION
Thursday Evening, November 30
8:00 P.M.
America Ballroom (W)

Q8.1 THERMAL SHOCK RESISTANT BEHAVIORS OF ALUMINA CERAMICS DISPERSED WITH ZIRCONIA POLYCRYSTALS, Zhonghua Fang, Lihua Xu, Zhejiang University, Department of Materials Science and Engineering, Hangzhou, China; Changrong Ji, Florida Tech, Department of Mechanical Engineering, Melbourne, FL; Guangjian Huang, Shaoxing Materials Corporation, Shaoxing, China; Zhijian Shen and Zishang Ding, Zhejiang University, Department of Materials Science and Engineering, Hangzhou, China.

Q8.2 INVESTIGATION OF CRACKING MECHANISM OF PLASMA SPRAYED ALUMINA-13% TITANIA BY ACOUSTIC EMISSION, C.K. Lin, S.H. Leigh, R. Gansert, K. Murakami, S. Sampath, H. Herman and C.C. Berndt, The Thermal Spray Laboratory, Department of Materials Science and Engineering, SUNY at Stony Brook, NY.

Q8.3 STUDY OF FIBER COMPOSITE FAILURE CRITERION, S.J. Zhou, R. Blumenfeld, B.L. Holian, P.S. Lomdahl, Los Alamos National Laboratory, Theoretical Divison and Center for Nonlinear Studies, Los Alamos, NM; and W.A. Curtin, Virginia Tech, Blacksburg, VA.

Q8.4 MODEL REACTION FOR Si3N4-H2O RELATED TO SURFACE STRESS CORROSION, Larry W. Burggraf, Air Force Institute of Technology, WPAFB, OH; Jing Shan, Wright State University, Dayton, OH; and Mark S. Gordon, Iowa State University, Department of Chemistry, Ames, IA.

Q8.5 SIMULATION OF DYNAMICS OF FRACTURE BY BUCKLING, Masao Doyama and K. Kogure, Nishi-Tokyo University, Department of Materials, Yamanashi, Japan.

Q8.6 ROLE OF PLATE GEOMETRY IN THE FRACTURE OF BRITTLE MATERIALS, Pep Español, Miguel A. Rubio and Ignacio Zúñiga, UNED, Departamento de Física Fundamental, Madrid, Spain.

Q8.7 POWER SPECTRAL CHARACTERIZATION OF TNT FRACTURE SURFACES USING ATOMIC FORCE MICROSCOPY, M.Y.D. Lanzerotti, U.S. Army ARDEC, Picatinny Arsenal, NJ; D.J. Thomson, AT&T Bell Laboratories, Murray Hill, NJ; and A. Wolfe, New York City Technical College, Department of Physics, Brooklyn, NY.

Q8.8 FAST-FRACTURE PERIODIC-INSTABILITY INTERMITTENCY VERSUS RANDOM-SPORADICITY BURST ACOUSTIC-EMISSION IN GLASSES:DISLOCATION-SOLUTION-FREE MANIFESTATION OF SIEGEL "CLASSICAL-ACOUSTIC-PHONON-MASER" <CAPM> -THEORY NONLINEAR-DYNAMICS: PRE BAK, NOT PER BAK SELF-ORGANIZED-CRITICALITY ROOT-CAUSE IN NEWTON'S LAW F=ma, Edward Siegel, Synergetics Paradigm & Dichotomy, Brookline, MA.

Q8.9 FILM EFFECTS ON DUCTILE/BRITTLE BEHAVIOR IN STRESS-CORROSION CRACKING, Tong-Yi Zhang, Hong Kong University of Science and Technology, Centre for Advanced Engineering, Kowloon, Hong Kong; Wu-Yang Chu and Ji-Mei Xiao, University of Science and Technology Beijing, Department of Materials Physics, Beijing, China.

Q8.10 FIRST PRINCIPLES DETERMINATION OF THE TENSILE AND SLIP ENERGY BARRIERS FOR B2 NiAl AND FeAl, Ruqian Wu, Lu-jen Chen, California State University at Northridge, Department of Physics, Northridge, CA; Lieping Zhong and A.J. Freeman, Northwestern University, Department of Physics, Evanston, IL.

Q8.11 MOLECULAR STATICS SIMULATION OF CRACK PROPAGATION IN a-FE USING EAM POTENTIALS, Vijay Shastry and Diana Farkas, Virginia Tech, Department of Materials Science and Engineering, Blacksburg, VA.

Q8.12 DUCTILE-BRITTLE TRANSITION IN SINGLE-CRYSTALS OF HIGH NITROGEN AUSTENITIC STAINLESS STEEL, Y.I. Chumlyakov, I.V. Kireeva, E.I. Litvinova, Yu.L. Zuev, Siberian Physical Technical Institute, Tomsk, Russia.

Q8.13 TRIBOEMISSION AND WEAR OF HYDROGENATED CARBON FILMS, Keiji Nakayama, Mechanical Engineering Laboratory, Ibaraki, Japan.

Q8.14 RELATIONSHIP BETWEEN VISCOELASTIC PROPERTIES OF EPOXY POLYMERS AND DYNAMIC FRACTURE TOUGHNESS OF EPOXY BASED ADHESIVE JOINTS, P.G. Babayevsky, Alexander S. Grabilnikov, O.M. Zinevich and A.Y. Khovrin, Moscow State Aviation Technology University, Moscow, Russia.

Q8.15 MICROMECHANICAL BEHAVIOR OF POLYMER INTERFACE REINFORCED WITH COPOLYMERS, Qing Wang, Fu-Pen Chiang, State University of New York at Stony Brook, Department of Mechanical Engineering, Stony Brook, NY; and Jonathan Sokolov, State University of New York at Stony Brook, Department of Materials Science and Engineering, Stony Brook, NY.

Q8.16 STUDY OF THE EFFECT OF A RANDOM COPOLYMER ON ADHESION OF IMMISCIBLE HOMOPOLYMERS, L. Guo, M. Rafailovich, J. Sokolov, State University of New York at Stony Brook, Department of Materials Science and Engineering, Stony Brook, NY; D. Peiffer, Exxon Research and Engineering Company, Annandale, NJ; S. Schwarz, Queens College, Department of Physics, Flushing, NY; A. Eisenberg, McGill University, Montreal, CA.

SESSION Q9: FRACTURE SURFACE ROUGHNESS AND
FRACTAL PROPERTIES
Chair: J.J. Mecholsky
Friday Morning, December 1
Staffordshire (W)

8:30 A.M. *Q9.1
REVIEW OF ANALYSIS OF FRACTURE ROUGHNESS, R. Blumenfeld, Los Alamos National Laboratory, Theoretical Divison and Center for Nonlinear Studies, Los Alamos, NM.

9:00 A.M. *Q9.2
FRACTALS AND FRACTURE, T.J. Mackin, University of Illinois at Urbana-Champaign, Department of Mechanical and Industrial Engineering, Urbana, IL; and J.J. Mecholsky Jr., University of Florida, Department of Materials Science and Engineering, Gainesville, FL.

9:30 A.M. Q9.3
EXPERIMENTAL PROTOCOL FOR FRACTAL MEASUREMENT TECHNIQUES, Z. Chen, J. Cuneo and J.J. Mecholsky Jr., University of Florida, Department of Materials Science and Engineering, Gainesville, FL.

9:45 A.M. Q9.4
FRACTURE SURFACE FRACTAL DIMENSION DETERMINED THROUGH EXTENSIVE 3-D RECONSTRUCTION, Jean Jacques Ammann and Ana M. Nazar, School of Mechanical Engineering, Department of Materials Engineering, Campinas, Brazil.

10:00 A.M. BREAK

10:30 A.M. *Q9.5
EXPERIMENTAL CHARACTERIZATION OF FRACTAL CRACKS, Elisabeth Bouchaud, O.N.E.R.A. (OM), Chatillon, France.

11:00 A.M. Q9.6
BRITTLE FRACTURE AT THE NANOMETER SCALE, E. Guilloteau, S. Hénaux and F. Creuzet, Laboratoire CNRS/Saint-Gobain, Surface du Verre et Interfaces, Aubervilliers, France.

11:15 A.M. Q9.7
DEPENDENCE OF FRACTAL DIMENSION OF FRACTURE SURFACE ON THE PHYSICAL MECHANISMS OF FRACTURE, Leon L. Mishnaevsky Jr., IATM, Frankfurt/Main, Germany.

11:30 A.M. Q9.8
FRACTAL INVESTIGATION ON FRACTURE AND ERODED SURFACES OF CERAMICS, Lihua Xu, Zhonghua Fang, Zhejiang University, Department of Materials Science and Engineering, Hangzhou, China; Changrong Ji, Florida Tech, Department of Mechanical Engineering, Melbourne, FL; Guangjian Huang, Shaoxing Materials Corporation, Shaoxing, China; Zhijian Shen and Zishang Ding, Zhejiang University, Department of Materials Science and Engineering, Hangzhou, China.

11:45 A.M. Q9.9
SCALING OF FRACTURE IN QUASIBRITTLE MATERIALS AND THE QUESTION OF POSSIBLE INFLUENCE OF FRACTAL MORPHOLOGY, Zdenek P. Bazant, Northwestern University, Department of Civil Engineering, Evanston, IL.

SESSION Q10: SCALING AND FRACTURE PROCESSES
Chair: Fereydoon Family
Friday Afternoon, December 1
Staffordshire (W)

1:30 P.M. *Q10.1
SCALING LAWS IN FRACTURE: WHEN IS A NOTCH TEST MISLEADING? Phillip M. Duxbury, Michigan State University, Department of Physics/Astronomy and Center for Fundamental Materials Research, East Lansing, MI.

2:00 P.M. Q10.2
FRACTURE SURFACES IN 3D FUSE NETWORKS, M.J. Alava, Helsinki University of Technology, Laboratory of Physics, Espoo, Finland; V.I. Raisanen, Center for Scientific Computing, Espoo, Finland; and R.M. Nieminen, Helsinki University of Technology, Laboratory of Physics, Espoo, Finland and Center for Scientific Computing, Espoo, Finland.

2:15 P.M. Q10.3
MODELING ACOUSTIC EMISSION IN MICROFRACTURING PROCESSES, S. Zapperi, Boston University, Department of Physics and Center for Polymer Studies, Boston, MA; A. Vespignani, University of Leiden, Instituut-Lorentz, Leiden, Netherlands.

2:30 P.M. Q10.4
TEMPERATURE DEPENDENT FRACTURE MORPHOLOGY SEQUENCE OBSERVED IN BaTiO3 AND PbTiO3 IN THE VICINITY OF FERROELECTRIC PHASE TRANSITION, V.A. Alyoshin, Rostov University, Rostov-on-Don, Russia.

2:45 P.M. Q10.5
FRACTAL AND MULTIFRACTAL DISTRIBUTIONS OF FRAGMENT MASSES IN FRACTURED PLASTER DISKS, Fereydoon Family and Beth C. Lewis, Emory University, Department of Physics, Atlanta, GA.

3:00 P.M. BREAK



3:30 P.M. Q10.6
DOUBLET-BASED LINEAR ELASTIC FRACTURE MECHANICS, V.T. Granik and M. Ferrari, University of California, Department of Civil Engineering, Berkeley, CA.

3:45 P.M. Q10.7
FRACTURE PROCESS CONTROL FOR A PEEL-APART IMAGING FILM, H.-C. Choi, A. Kniazzeh and F. Habbal, Polaroid Corporation, Waltham, MA.

4:00 P.M. Q10.8
THE NATURE OF FRACTURE AND FRACTURE SURFACE STRUCTURES IN CRYSTALLINE AND DISORDERED ALLOYS, Valery P. Kisel, Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Russia.

4:15 P.M. Q10.9
SIMULATION OF DYNAMICS OF FRACTURE AT THE INTERFACES OF THIN FILMS, K. Kogure and Masao Doyama, Nishi-Tokyo University, Department of Materials, Yamanashi, Japan.

4:30 P.M. Q10.10
A PROCESS ZONE CRACK INSTABILITY MODEL FOR QUASICLEAVAGE IN FERRITIC AND MARTENSITIC STEELS, G.R. Odette and K.W. Edsinger, University of California, Santa Barbara, Department of Mechanical Engineering and Chemical Engineering, Santa Barbara, CA.


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