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Knowles Lecture

James K. Knowles Lectures and Caltech Solid Mechanics Symposium

Friday, February 13, 2015
Beckman Institute Auditorium

James K. Knowles

The 6th annual James K. Knowles Lecture and Caltech Solid Mechanics Symposium will be held on Friday, February 13, 2015, in the Beckman Institute Auditorium. The James K. Knowles Lecture by Mary C. Boyce, Dean of Engineering, Columbia University, will be followed by the Solid Mechanics Symposium with presentations by current Caltech graduate students and postdocs.

The Lecture and Symposium are in memory of James K. Knowles, William J. Keenan, Jr. Professor of Applied Mechanics, Emeritus, who passed away on November 1, 2009. He is well known for his research contributions to the theory of nonlinear elasticity and the mathematical theories of materials and structures. Dr. Knowles inspired and influenced generations of students and scholars and authored over one hundred journal publications, as well as a textbook for graduate students entitled Linear Vector Spaces and Cartesian Tensors (Oxford University Press).

The Lecture and Symposium will be held annually and are made possible by the Division of Engineering and Applied Science and the support of family, friends and colleagues through donations to the James K. Knowles Memorial Fund.

James K. Knowles Lectures

Mary C. Boyce

Mary C. Boyce, Dean of Engineering, Fu Foundation School of Engineering and Applied Science, Columbia University

Mechanics of Soft Composites: The Interplay Between Geometrical Structuring and Large Deformation to Achieve Novel Behavior

Soft composites offer new avenues for the design and fabrication of materials and devices that exhibit novel properties and functional behavior. Engineering the interplay between the geometrical structuring of constituent materials and the large deformation behavior of the soft matrix enables structural transformations and tunable properties. Here we explore the mechanics and the design of soft composites through analytical and numerical modeling as well as through experiments on physical prototypes fabricated using multi-material 3D printing. Examples include: layered structures which exhibit deformation-induced transformation of the layered pattern leading to concomitant changes in other attributes to manipulate wave propagation and phononic band gaps; materials with alternating soft/stiff layered structures which provide protective yet flexible armor while also providing a novel material design for soft actuators which transform local compressive loading to large scale rotational motion; and soft matrices augmented by stiff particles which provide deformation-induced morphing surface topologies with engineered surface topologies with the potential to influence a wide range in surface behavior.

Mary C. Boyce is Dean of Engineering at The Fu Foundation School of Engineering and Applied Science at Columbia University in the City of New York and also the Morris A. and Alma Schapiro Professor of Engineering. Prior to joining Columbia, Dean Boyce served on the faculty of the Massachusetts Institute of Technology (MIT) for over 25 years, leading the Mechanical Engineering Department from 2008 to 2013. Her research focuses on materials and mechanics, particularly in the areas on multi-scale mechanics of polymers and soft composites, both those that are man-made and those formed naturally. Her leadership in the field of mechanics of materials has expanded understanding of the interplay between micro-geometry and the inherent physical behavior of a material, which has led to innovative hybrid material designs with novel properties.

Dean Boyce has been widely recognized for her scholarly contributions to the field of mechanics of materials, including election as a fellow of the American Society of Mechanical Engineers, the American Academy of Arts and Sciences, and the National Academy of Engineering. She also has been honored for her teaching at MIT, where she was named a MacVicar Faculty Fellow and received the Joseph Henry Keenan Innovation in Undergraduate Education Award. Dean Boyce earned her BS degree in engineering science and mechanics from Virginia Tech, and her MS and PhD degrees in mechanical engineering from MIT.

Event Program

Time Speaker Title
9:00–10:00am Mary BoyceKeynote Mechanics of Soft Composites: The Interplay between Geometrical Structuring and Large Deformation to Achieve Novel Behavior
10:00–10:30am Refreshments
10:30–10:55am Mauricio PongaPostdoc Computing the energy of crystalline defects in Mg using large scale ab-initio simulations
0:55–11:20am Lauren MontemayorGrad Student Flaw Tolerant Behavior of Alumina Nanolattices Emerges as Characteristic Length Scale Decreases
11:20–11:45am Toktam MohammadnejadPostdoc Numerical modeling of hydraulic fracture propagation and closure in porous media using XFEM
11:45–12:10pm Vinamra AgrawalGrad Student Theoretical analysis of impact induced depolarization of ferroelectric ceramics
12:10–1:30pm Lunch
1:30–1:55pm Zach SternbergerGrad Student Viscous Plastic Flow at Extreme Pressures and Strain Rates
1:55–2:20pm Brandon RunnelsGrad Student Modeling relaxed interface energy and morphology: a variational approach
2:20–2:45pm Yingrui ChangGrad Student Texture Evolution in Magnesium and the Role of Twinning
2:45–3:15pm Refreshments
3:15–3:40pm Semechah LuiGrad Student Elastodynamic modeling of interacting frictional shear cracks
3:40–4:05pm John SteevesGrad Student Active Carbon Shell Mirrors
4:05–4:30pm Vahe GabuchianGrad Student Earthquakes may open faults
4:30–4:55pm Nicolas LeePostdoc In-space robotic assembly of a modular telescope structure
4:55–6:00pm Social