Micromechanics and Materials Laboratory
University of Wisconsin
Researchers
Students, collaborators and friends
We are interested in materials with heterogeneous structure, including natural composites such as bone, ligament, and wood, as well as synthetic composites and cellular solids. We investigate the freedom of natural and synthesized materials to behave in ways not anticipated in elementary continuum representations, and to attain physical properties of much higher magnitude than anticipated from standard theories. Composites have been developed in which the composite stiffness is greater than the stiffness of any constituent in the composite. Viscoelastic materials are of particular interest as high performance damping materials and as materials which undergo creep in industrial settings. We determine viscoelastic properties over eleven orders of magnitude of frequency, with no need for temperature shifts.
A major theme of research in our laboratory is the creation and characterization of materials with extreme and unusual physical properties. We have developed materials with reversed properties, including negative Poisson's ratio, negative stiffness, and negative thermal expansion.
We pursue basic research as well as applied research for industry.
The Micromechanics Laboratory is located in room 212 of the Engineering Research Building (ERB).
Lab Facilities.
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Collaborators:
W. Bonfield (Cambridge), Biomaterials
R. Carpick (Penn), nano-mechanics
R. Cooper (Brown), Materials Science, Geology
S. Cramer (Wisconsin), Civil Engineering, wood
W. Drugan (Wisconsin), Theoretical Mechanics
D. Eyre (Utah) Mathematics of composites
J. L. Katz (Case Western and Kansas City Dental), Biomedical engineering, Biomechanics. In memoriam, (2013).
X. Li (Wisconsin), Composite synthesis
A. Lal (Cornell) Electrical; Resonant Ultrasound
G. Milton (Utah) Mathematics of composites
J. B.Park, (Iowa) Biomaterials
A. Ruina A. Ruina 2 (Cornell) Bicycle mechanics, walking, mechanics
F. Scarpa (Bristol, England) Advanced materials and structures
D. Stone (Wisconsin), Materials Science
S. S. Sternstein (RPI - Union) Polymers, composites
C. Swan (Iowa) Theory of Composites
R. Vanderby (Wisconsin), Biomechanics. College
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A. Wineman (Michigan) Rheology, continuum mechanics
K. W. Wojciechowski (Poznan, Poland) Computational physics, advanced heterogeneous media including negative Poisson's ratio
Other groups
R. Behringer (Duke) Physics of granular materials
D. Bigoni (Trento, Italy) Solid mechanics
L. Berlyand (Penn State) Mathematics, composite materials
A. Cherkaev (Utah) Mathematics of composites
R. Gibala (Michigan) Materials, internal friction
J. Jenkins (Cornell) Mechanics, granular materials
R. Leisure (Colorado State), Resonant Ultrasound, internal friction
A. Sastry (Michigan) Multiscale materials
O. Sigmund (Lyngby, Denmark) Topology optimization
S. White (Illinois) Composites, self healing polymers
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Visiting Scholars
Dr. Xinchun Shang, Professor in Solid Mechanics and Associate Head of the Department, University of Science and Technology, Beijing, China, Spring 2005. Theoretical study of the stability of composites.
Dr. Dong Li, Northeastern University, Shenyang, China, Spring and summer 2012. Study of vibration of materials with resonant ultrasound spectroscopy.
Students and Research Associates:
S. Duenwald, Research Associate, Ligament and tendon
T. Jaglinski, Visiting Scientist, Advanced materials
J. Kondratko, Ligament and tendon
A. LaCroix, Ligament and tendon
J. Lehman, Advanced materials
T. Carlson, Advanced materials
E. Sritham, viscoelasticity of food products, with Dr. S. Gunasekaran
Advanced Material Stability Group, R. Lakes, P. I. S. Soofi. Liang Dong, research associate, to 2012. Dennis Kochmann and Tim Jaglinski are with us in 2010 as research associates. C. Mertz, wood mechanics, with Dr. S. Cramer, Civil Engineering.
Alumni, M. Castillo, Advanced materials, biomaterials; P. Kohlhepp (with Dr. R. Carpick); B. Moore (with R. Lakes); C. Sabo (with R. Lakes and Dr. R. Carpick); H. W. Yap (with Dr. R. Carpick); Y. Liu, (with R. Lakes visiting from the University of Bristol, England)
Recent group alumni and last known location.
B. Brandel, Chipless Metals
P. Buechner, U. S. Patent Office
A. Butenhoff
J. Capodagli, Appleton
J. Dandrea, industry
P. Frascone, Trek
D. Kochmann, (with Dr. W. Drugan), Fulbright fellow. Lehrstuhl fur Allgemeine Mechanik, Ruhr-Universitat Bochum; as of 2011 faculty at Caltech.
T. Jaglinski, Ph. D. (2006). Visiting scientist
R. Hingorani, medical school
T. Lee, PhD, 2001. Harvard University, now at University of Singapore
M. Ludwigson, Symbiont, Milwaukee area, WI
K. Lynch
K. MacMillan, Medical Physics
E. Manley, Boston University C. Marquez, Americorps S. Nimityongskul, Spacecraft Dynamics studies, University of Wisconsin A. Oza, St. Jude Medical, Los Angeles, California T. Schmidt R. Schmitz, ATA Aircraft A. Singh, ATS Corp., Bordentown New Jersey M. Torres Y. C. Wang, Faculty, National Cheng Kung University, Taiwan. J. Villerd (with Dr. W. Drugan), France B. Welbes, Boeing
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Research group (advanced materials and smart structures), June 2012. From left, Liang Dong, Professor Stone, T. M. Jaglinski, T.. Carlson, R. Lakes, H. Kalathur, Dong Li, J. Lehman.
Ligament and tendon project (not shown), Professor Vanderby, S. Duenwald-Kuehl, J. Kondratko, A. LaCroix.
Food project, Professor Gunasekran, E. Sritham.
Research group (advanced materials), Nov. 2009. From left, R. Lakes, S. Soofi, Professor Stone, Y. Liu, L. Dong.
Ligament and tendon project, Professor Vanderby, S. Duenwald. Food project, Professor Gunasekran, E. Sritham. Polymer viscoelasticity project, K. Lynch.
Research group, 2005. Seated, from left, S. Nimityongskul, J. Capodagli, B. Moore. Standing, T. Jaglinski, R. Lakes, D. Kochmann, A. Singh. Not present, C. Mertz, J. Villerd. Nano- composite collaborators (not shown) De Cicco, M., Konishi, H., Cao, G., Choi, H., Professor Turng, L. S., Professor Perepezko, J. H., Professor Kuo, S., and Professor Li, X.
Research group, 2002. From left, R. Lakes, A. Oza (ligament), E. Manley (ligament), T. Jaglinski (metal creep), B. Welbes (advanced material development), R. Hingorani (ligament), Y. C. Wang (advanced material development). Not present, T. Schmidt.
Prof. Crone, Carpick, and Lakes in the holography laboratory.
Viscoelasticity lab
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