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Jorgen Bergstrom, Ph.D
 CV in pdf-format
Professional Profile
Dr. Jorgen Bergstrom is a consultant for Veryst Engineering LLC, and is based in Boston,
Massachusetts. Dr. Bergstrom consults primarily in the modeling,
testing, and analysis of mechanical behavior of materials,
particularly polymeric materials and MEMS. His consulting work
includes sensor design and analysis, polymer windows, gaskets and
hoses, injection molded components, and polymer films. He has
worked with the National Institute of Health and Department of
Defense on the modeling of material behavior. He has developed
world-recognized models for simulating the large deformation,
rate-dependent, non-linear behavior of thermoplastics and
thermosets. In addition to theoretical modeling Dr. Bergstrom has
significant experience with experimental material
characterization, including mechanical testing, calorimetry,
microscopy, and spectroscopy.
Dr. Bergstrom also works with particle and fiber-filled
polymer composites. He has additional expertise in the behavior
of brittle materials such as ceramics, ice, and rocks. This
expertise includes research in crack nucleation, crack
coalescence, and shear fault formation in brittle solids. Dr.
Bergstrom also specializes in different computer simulation
techniques, including finite element modeling, molecular
dynamics, and Monto Carlo simulations.
Dr. Bergstrom's expertise is applicable to problems in
material processing, manufacturing simulation, product design,
and failure analysis.
Dr. Bergstrom is a Lecturer in the Department of Mechanical Engineering at MIT.
Credentials and Professional Honors
Ph.D., Mechanical Engineering, Massachusetts Institute of Technology, 1999
M.S., Mechanical Engineering, Thayer School of Engineering, Dartmouth College, 1995
B.S., Mechanical Engineering, Thayer School of Engineering, Dartmouth College, 1993
B.S., Mechanical Engineering, Royal Institute of Technology, Stockholm, Sweden, 1992
Sigma Xi, Scientific Research Honor Society;
The Charles F. and Ruth D. Goodrich Prize, Dartmouth College, 1995;
George Austin Colligan Fellow, Dartmouth College, 1993;
The General Scholarship, Royal Institute of Technology, 1990, 1992;
The Scholarship of Sandviken, Royal Institute of Technology, 1992
American Society of Mechanical Engineers
The Society of Plastics Engineers
Certified Composites Technician
Books and Book Chapters
"Modeling and Mechanical Analysis of Fluoropolymer
Components," in Fluoropolymers Applications: Chemical Processing Industry -
The Definitive User's Guide and Databook.
Edited by Sina Ebnesajjad,
Plastics Design Library, Williams Andrew Publishing, 2004.
"Computer Modeling and Simulation of UHMWPE,"
in Ultra-High Molecular Weight Polyethylene Handbook.
Edited by Steven Kurtz,
Elsevier, 2004.
Publications
"Modeling of the Dynamic Thermomechanical Response of Elastomers,"
Tire Science and Technology, 2005, Vol. 33, No. 2, pp. 120-134.
"Failure Property Distributions for Conventional and Highly Crosslinked
Ultra-High Molecular Weight Polyethylenes, " Journal of
Biomedical Materials Research: Part B - Applied Biomaterials, 2005, Vol. 73B, Issue 2, pp. 214-220
(with S.M. Kurtz and C.M. Rimnac).
"A Constitutive Model for Predicting the
Large Deformation Thermomechanical Behavior of
Fluoropolymers, " Mechanics and Materials, 2005, Vol. 37, pp. 899-913
(with L.B. Hilbert).
"Molecular Chain Stretch is a Multiaxial
Failure Criterion for Conventional and Highly Crosslinked
UHMWPE," Journal of Orthopaedic Research, 2005, Vol. 23, pp. 367-375
(with C.M. Rimnac and S.M. Kurtz).
"An Augmented Hybrid Constitutive Model for Simulation of
Unloading and Cyclic Loading Behavior of Conventional and
Highly Crosslinked UHMWPE," Biomaterials, Vol. 25, pp. 2171-2178,
2004 (with C.M. Rimnac and S.M. Kurtz).
"FRP Flumes Real Impact - What Happens?," Composite Fabrication,
pp. 32-34, April, 2004 (with S. Brown).
"Prediction of Multiaxial Mechanical Behavior for Conventional
and Highly Crosslinked UHMWPE Using a Hybrid Constitutive
Model," Biomaterials, Vol 24, pp. 1365-1380, 2003 (with S.M.
Kurtz and C.M. Rimnac).
"Thermomechanical Behavior of Virgin and Highly Crosslinked
Ultra-High Molecular Weight Polyethylene Used in Total Joint
Replacements," Biomaterials, Vol. 23, pp. 3681-3697, 2002
(with S.M. Kurtz, M.L. Villarraga, M.P. Herr, C.M. Rimnac, and
A.A. Edidin).
"Constitutive Modeling of Ultra-High Molecular Weight
Polyethylene under Large-Deformation and Cyclic Loading
Conditions," Biomaterials, Vol. 23, pp. 2329-2343, 2002 (with
S.M. Kurtz, C.M. Rimnac, and A.A. Edidin).
"Miniature Specimen Shear Punch Test for UHMWPE used in Total
Joint Replacements," Biomaterials, Vol 23, pp. 1907-1919,
2002 (with S.M. Kurtz, C.W. Jewett, J.R. Foulds and A.A.
Edidin).
"A Progressive Damage Model for Failure by Shear Faulting in
Polycrystalline Ice under Biaxial Compression," Int. J.
Plasticity, Vol 18, pp. 507-530, 2002 (with. V. Gupta).
"Constitutive Modeling of the time-dependent and cyclic
loading of elastomers and application to soft biological
tissues," Mechanics of Materials, Vol. 33, pp. 523-530, 2001
(with. M.C. Boyce).
"Deformation of Elastomeric Networks: Relation between
Molecular Level Deformation and Classical Statistical Mechanics
Models of Rubber Elasticity," Macromolecules, Vol. 34, No. 3,
pp. 614-626, 2001 (with M.C. Boyce).
"Large Strain Time-Dependent Behavior of Filled
Elastomers," Mechanics of Materials, Vol. 32, pp. 627-644,
2000 (with M.C. Boyce).
"Mechanical Behavior of Particle Filled Elastomers,"
Rubber Chem. Tech., Vol. 72, pp. 633-656, 1999 (with M.C.
Boyce).
"Large Strain Time-Dependent Behavior of Elastomeric
Materials," Ph.D. Thesis, MIT, 1999.
"Constitutive Modeling of the Large Strain Time-Dependent
Behavior of Elastomers," J. Mech. Phys. Solids, Vol. 46, pp.
931-954, 1998 (with M.C. Boyce).
"Compressive Failure of Rocks by Shear Faulting," J.
Geophys. Research-B: Solid Earth, Vol. 103, No. B10, pp.
23875-23895, 1998 (with V. Gupta).
"Effect of Step-Loading History and Related Grain-Boundary
Fatigue in Freshwater Columnar Ice in the Brittle Deformation
Regime," Phil. Mag. Letters, Vol. 77, No. 5, pp. 241-247,
1998, (with V. Gupta and C.R. Picu).
"Nucleation of Splitting Cracks in Columnar Freshwater
Ice," Acta Mater, Vol. 45, No. 4, pp. 1411-1423, 1997 (with
V. Gupta, and C.R. Picu).
"Brittle Failure of Columnar Freshwater Ice under Off-Axis
Compression Loading," Scripta Materialia, Vol. 36, No. 1, pp.
63-67, 1997 (with C.R. Picu, and V. Gupta).
Presentations and Published Abstracts
"Finite Element Modeling of Thermoplastics: How to Select an Accurate Material Model,"
e-Presentation given for the Society of Plastic Engineers as part of Best of ANTEC 2006.
"A New Consitutive Model Framework for Polymer Foams,"
paper presented at the 43rd Annual Technical Meeting of the Society of Engineering Science,
University Park, PA, August 2006.
"A Constitutive Model for Simple Wheat Flour Dough,"
paper presented at the 43rd Annual Technical Meeting of the Society of Engineering Science,
University Park, PA, August 2006 (with S. Chakrabarti).
"Development and Implementation of an Advanced User Material Model for
UHMWPE," paper presented at the 9th International LS-DYNA Users' Conference,
Dearborn, MI, June 2006 (with A. Bowden, S.M. Kurtz, and C.M. Rimnac).
"Advanced Finite Element Modeling of Polymer Foam Components,"
paper presented at the 2006 ABAQUS Users' Conference, Boston, MA, May 2006.
"A Comparison between Different Material Models for Thermoplastics,"
paper presented at the Society of Plastics Engineers ANTEC, Charlotte, NC, May 2006.
"Rim Fracture Risk of Highly Crosslinked Polyethylene Total Disc Replacement,"
paper presented at the 6th annual Spine Arthoplasty Society Meeting, Montreal, Canada,
2006 (with A. Bowden, and S.M. Kurtz).
"Finite Element Modeling of a Thermoplastic Seal at High Temperature
and Pressure," paper presented at ABAQUS East Regional Users´
Meeting, Westborough, MA, November 2005 (with L.B. Hilbert).
"Dynamic Stress-Strain Behavior of Filled Natural Rubber under Combined
Axial and Shear Straining,"
paper presented at European Conference on Constitutive Models for Rubber
(ECCMR 2005), KTH, Stockholm, Sweden, June 2005 (with W.V. Mars).
"Experimental Data and Constitutive Modeling of Elastomers,"
paper presented at Society of Plastics Engineers ANTEC, Boston, MA,
May 2005.
"Modeling of the Dynamic Thermomechanical Response of Elastomers,"
paper presented at 23rd Annual Conference on Tire Science and Technology,
Akron, OH, September 2004.
"Distributions of Ultimate Properties for Conventional
and Highly Crosslinked UHMWPE," paper presented at the 7th World Biomaterials
Congress, Sydney, Australia, May 2004 (with S.M. Kurtz and C.M. Rimnac).
"Failure Predictions of Highly Crosslinked UHMWPE,"
paper presented at the 7th World Biomaterials Congress, Sydney, Australia, May 2004
(with S.M. Kurtz and C.M. Rimnac).
"Predicting Failure Risk of TKA Designs Incorporating
Highly Crosslinked UHMWPE," paper presented at the 7th World Biomaterials
Congress, Sydney, Australia, May 2004 (with S.M. Kurtz, T. Harrigan, and
C.M. Rimnac).
"Ultimate Property Distributions for Conventional and
Highly Crosslinked UHMWPE," paper presented at the 50th Annual Meeting
of the Orthopaedic Research Society, San Francisco, CA, March 2004 (with S.M. Kurtz,
and C.M. Rimnac).
"Analysis of Stresses and Fracture Risk for Posterior-Stabilized TKA
Designs Incorporating Highly Crosslinked UHMWPE,"
paper presented at the 50th Annual Meeting of the Orthopaedic Research
Society, San Francisco, CA, March 2004 (with S.M. Kurtz, T. Harrigan, and
C.M. Rimnac).
"Evaluating Pressure Integrity of Polymer Ring Seals for Threaded
Connections in HP/HT Wells and Expandable Casing," paper presented
at the IADC/SPE Drilling Conference, Dallas, TX, March 2004 (with L.B. Hilbert).
"Large Strain Time- and Temperature-dependent modeling of
PTFE," paper presented at 2nd MIT conference on Computational
Fluid and Solid Mechanics, Cambridge, MA, June 2003 (with L.B.
Hilbert, and S.B. Brown).
"Multiaxial Failure Modeling For Conventional and Highly
Crosslinked UHMWPE," paper presented at 29th Annual Meeting
of the Society For Biomaterials, Reno, NV, May 2003 (with S.M.
Kurtz, and C.M. Rimnac).
"Finite Element Modeling for Design and Failure Analysis of
Polymer Materials," MTI Materials Technology Institute of the
Chemicals Process Industries, Inc., TAC Meeting, Clearwater
Beach, FL, Feb 2003 (with S. Brown).
"Plastics: Issues of Litigation Exposure,"
Concord, NH, May 2, 2002;
Manchester, NH, May 8, 2002;
Pittsburgh, PA, Sept. 10, 2002;
Philadelphia, PA, Sept. 16, 2002
(with C.E. Scott).
"Constitutive Modeling of Crosslinked UHMWPE for Joint
Replacements," paper presented at the 48th Annual Meeting of
the Orthopaedic Research Society, Dallas, TX, Feb 2002 (with S.M.
Kurtz, C.M.Rimnac, and A.A. Edidin).
"Constitutive Modeling of the Large Strain Time-Dependent
Behavior of Particle Filled Elastomers," 159th Spring
Technical Meeting of the Rubber Division of the American Chemical
Society, Providence, RI, Apr 2001.
"Constitutive Theories for UHMWPE for Monotonic and Cyclic
Loading Conditions," paper presented at 27th Annual Meeting
of the Society For Biomaterials, Saint Paul, MN, Apr 2001 (with
S.M. Kurtz, C.M. Rimnac, and A.A. Edidin).
"Multiaxial Validation of Constitutive Theories for
UHMWPE," paper presented at 27th Annual of the Society of
Biomaterials, Saint Paul, MN, Apr 2001 (with S.M. Kurtz, C.M.
Rimnac, and A.A. Edidin).
"Time-Dependent Deformation in Elastomeric Materials,"
paper presented at 35th Annual Technical Meeting of the Society
of Engineering Science Inc., WA, Sep 1998 (with M.C.
Boyce).
"Time-Dependence of Elastomeric Materials: Experiments and
Modeling," paper presented at 10 th International Conference
on Deformation, Yield and Fracture of Polymers, Cambridge, UK,
Apr 1997 (with M.C. Boyce).
"Compressive Failure of Rocks," paper presented at 36 th
U.S. Rock Mechanics Symposium, New York, Jun 1997 (with V.
Gupta).
"Time and Strain Dependence of the Mechanical Behavior of
Elastomers," paper presented at Multiscale Materials
Prediction Conference, MIT, Sep 1997 (with M.C. Boyce).
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