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IMECE ®

International Mechanical Engineering
Congress & Exposition®

David L. Lawrence Convention Center, Pittsburgh, PA

CONFERENCE
November 9-15, 2018
Exhibition
November 11-14, 2018

Program - Lectures

 

Monday, November 12

Roger Ohayon

Noise Control and Acoustics Division: Rayleigh Lecture
Dr. Roger Ohayon, Conservatoire National des Arts et Metiers, Structural Mechanics and Coupled Systems Laboratory

3:45pm–5:15pm
Room 409, Donald L. Lawrence Convention Center

After being Researcher at the aerospace research laboratory in France (ONERA), Roger Ohayon joined the Conservatoire National des Arts et Metiers (CNAM/Structural Mechanics and Coupled Systems Research Laboratory) as Professor Chair of Mechanics where he is now Emeritus Professor. He is Fellow of several associations (AIAA, ASME, IACM) and the recipient of the Humboldt Research Award, Lifetime Achievement SPIE Award, ASMS/ASME/AIAA Award, Prandtl Award from Eccomas, IACM Awards, EASD Senior Prize, and the French Academy of Science Award. His expertise lies in mechanical and computational modeling of fluid-structure and structural acoustics interaction problems and smart structural systems. He is on the editorial board of thirteen international journals, such as IJNME, CMAME, Computational Mechanics, and the associate editor of JIMSS and AIAA. He is the co-editor of several books and co-author of more than one hundred publications in refereed international journals.

Roger Ohayon has pioneered the development of mechanical and computational methods for prediction of fluid-structure vibrations of coupled systems in fluid-structure interaction (hydroelasticity and sloshing) and in structural-acoustics (noise prediction). In this context of fluid-structure interaction (attenuation for liquids in reservoirs) and of structural-acoustics (for noise reduction), he proposed to reduce vibrations using structural devices for smart adaptive intelligent thin systems and, more recently, has proposed an original dissipative interface modeling using passive/active and hybrid treatments.

Title: Computational Vibroacoustics in Low and Medium Frequency Bands

It is proposed to analyse, from predictive computational point of view—finite element discretization and specially appropriate various reduced order models—the dynamic behaviour of complex coupled systems and their adaptive intelligent treatment of interfaces for vibration and noise reduction of interior fluid-structure interactions problems, such as liquid/gas-structure, in low and medium frequency domains. 

The applications may be found, for example, in aerospace engineering such as liquid propelled launchers for the attenuation of the vibrations of liquids in tanks, the attenuation of noise in fairings for the satellites as well as attenuation of noise in fuselage cabin of aircrafts or helicopters, and attenuation of noise in automotive industries.

The frequency domain of interest is quite important for the computational analysis in order to avoid a large number of degrees of freedom, which lead to prohibitive computer times. In effect, the coupled situation is quite different from the classical problem of acoustic response to prescribed structural interface displacement/velocity fields because the dynamic of the structure can be very complex (composite structure, for instance). The low-frequency regime is characterized by a low modal density for structural-acoustics systems in which a frequency-independent modeling of the structural damping is, in most cases, satisfactory. The medium frequency range is characterized by a frequency-dependent damping in the structure as well as in the fluid. A distinction should be clearly made between gas and/or liquids taking into account incompressibility/compressibility as well as light fluids/heavy fluids considerations with gravity sloshing effects. 

In parallel of direct symmetric variational formulations/numerical finite elements for modal analysis of fluid-structure interior vibrations, the construction of a family of appropriate reduced order models is of prime importance for sensitivity analysis, multidisciplinary optimization, updating with experiments, as well as hybrid active/passive vibration reduction treatments of those systems for their control (as an example let us cite the modeling of “vibration and noise devices” acting as physical interfaces such as visco/piezo layers).Therefore, attenuation of vibrations and noise using smart materials such as piezoelectric and magnetorheological devices will be considered.

The purpose of this presentation will be to give a review synthesis of those aspects and perspectives.

Tuesday, November 13

Materials Division Sia Nemat-Nasser Award Lectures
Tak-Sing Wong, Department of Mechanical and Nuclear Engineering and Materials Research Institute
The Pennsylvania State University, University Park, Pennsylvania

3:45pm–4:45 pm
Room 409, Donald L. Lawrence Convention Center
 

Tak-Sing Wong

Tak-Sing Wong is currently an assistant professor of mechanical engineering and biomedical engineering and the inaugural holder of Wormley Family Early Career Professorship in Engineering at The Pennsylvania State University. Dr. Wong was a Croucher Foundation Postdoctoral Fellow at the Wyss Institute for Biologically Inspired Engineering at Harvard University. He received his Ph.D. (2009) in the Mechanical and Aerospace Engineering Department at UCLA and his B.Eng. (2003) in Automation and Computer-Aided Engineering from The Chinese University of Hong Kong. Dr. Wong’s research focuses on surface and interface, micro- and nanomanufacturing, as well as designing multi-functional biologically inspired surfaces with applications in water, energy, and health. His research has been published in Nature, Nature Materials, Nature Communications, PNAS, and Science Advances. His work on bio-inspired materials has been recognized with a R&D 100 Award, a National Science Foundation CAREER Award, a DARPA Young Faculty Award, as well as an invitation to the National Academy of Engineering’s U.S. Frontiers of Engineering symposium. Dr. Wong has also been named one of the world’s top 35 Innovators Under 35 (formerly TR35) by MIT Technology Review and was recognized with the IEEE Nanotechnology Council Early Career Award in Nanotechnology and the ASME Sia Nemat-Nasser Early Career Award for his contributions in bioinspired materials engineering.

Title: Interfacial Engineering Inspired by Nature

Yihui Zhang

Yihui Zhang, Department of Engineering Mechanics, Tsinghua University, Beijing

Yihui Zhang is an Associate Professor of Engineering Mechanics at Tsinghua University. He received his Ph.D. in engineering mechanics from Tsinghua University in 2011. Then he worked as a Postdoctoral Fellow from 2011 to 2014 and as a Research Assistant Professor from 2014 to 2015, both at Northwestern University. He joined the Department of Engineering Mechanics at Tsinghua University in 2015 and was tenured in 2018. His research interests include mechanically guided 3D assembly, soft composite materials, and stretchable electronics. He has published more than 90 peer-reviewed journal papers, including two in Science, eleven in Nature sister journals, three in Science Advances, four in PNAS, eight in the Journal of the Mechanics and Physics of Solids, three in ACS Nano, and eight in Advanced Functional Materials. His recent awards include ASME Sia Nemat-Nasser Early Career Award (2018), Society of Engineering Science’s Young Investigator Medal (2018), Eshelby Mechanics Award for Young Faculty (2017), ASME Melville Medal (2017), Journal of Applied Mechanics Award (2017), MIT Technology Review's 35 Innovators Under 35 (TR35 Award) (2016), and Qiu Shi Outstanding Young Scholar Award (2016). He is an associate editor of the Journal of Applied Mechanics (ASME Transactions), and serves on the editorial board of several academic journals, including Proceedings of the Royal Society A and npj Flexible Electronics.

Title: Bio-inspired Soft Network Materials With Unusual Mechanical Properties

Tuesday, November 13

Materials Division Nadai Medal Award Lecture

4:45pm–5:45pm
Room 410, Donald L. Lawrence Convention Center

The Nadai Medal goes to George M. Pharr for “Measurement of Power Law Creep Parameters by Nanoindentation”

George M. Pharr

George M. Pharr is TEES Eminent Research Professor in the Department of Materials Science and at Texas A&M University, College Station, TX. He received his B.S. in Mechanical Engineering at Rice University in 1975 and Ph.D. in Materials Science and Engineering from Stanford in 1979. After one year of postdoctoral study at the University of Cambridge, England, he returned to Rice in 1980 as a faculty member in the Department of Mechanical Engineering and Materials Science. He moved to the Department of Materials Science and Engineering at the University of Tennessee (UT) in 1998, where he served he as Chancellor's Professor and McKamey Professor of Engineering. While at UT, he also held a Joint Faculty Appointment at the Oak Ridge National Laboratory (ORNL), was Head of the UT Materials Science and Engineering Department, and served as the Director of the UT/ORNL Joint Institute for Advanced Materials. He joined the faculty of Texas A&M in January 2017.

Dr. Pharr received ASM International’s Bradley Stoughton Award for Young Teachers of Metallurgy in 1985. His honors also include the Amoco Award for Superior Teaching at Rice University (1994), a Humboldt Senior Scientist Award (2007), the Materials Research Society's inaugural Innovation in Materials Characterization Award (2010), and the University of Tennessee Macebearer Award (2015). He is a member of the National Academy of Engineering (2014) and a Fellow of ASM International (1995), the Materials Research Society (2012), and TMS (2016). Dr. Pharr has been an Associate Editor of the Journal of the American Ceramic Society since 1990 and Principal Editor of the Journal of Materials Research since 2012. He is an author or co-author of more than 200 scientific publications, including four book chapters. His research focuses on mechanisms of plasticity and fracture in solids, especially at small scales.

Measurement of Power Law Creep Parameters by Nanoindentation

Great progress has been made over the past decade in making mechanical property measurements at small scales by load- and depth-sensing indentation methods, also known as nanoindentation. The ability to make such measurements with sharp pyramidal indenters allows for high point-to-point spatial mapping of properties as well as the characterization of very thin films, thin surface layers, and even small particles or individual phases in complex multiphase microstructures. Although most nanoindentation testing has been done at room temperature, recent advances in nanoindentation testing equipment have expanded the horizons to very high temperatures, thus paving the way for the small-scale measurement of parameters characteristic of time-dependent creep deformation, such as the stress exponent, n, and the activation energy, Qc. However, in doing so, serious experimental difficulties are often encountered, and how one converts the data obtained in nanoindentation tests to the parameters normally used to characterize uniaxial creep is not at all straightforward because of the complex, nonuniform stress state produced during indentation contact.

In this presentation, we report on progress in making meaningful measurements of power law creep by nanoindentation based on recent experience with a new high temperature nanoindentation system capable of testing at temperatures up to 1100°C. Special attention is given to the models and data analysis procedures needed to convert nanoindentation load-displacement-time data into the creep parameters normally measured in uniaxial tension or compression testing. The models and procedures are evaluated by comparison to several sets of creep data in which the material behavior has been probed both by nanoindentation and by uniaxial testing methods.

Tuesday, November 13

AESD Lecture and Reception

5:00pm –7:00pm
Room 411, Donald L. Lawrence Convention Center

Frank Kreith Energy Award

William M. Worek, Department of Mechanical and Industrial Engineering, Texas A&M University - Kingsville, Texas

William Worek

William M. Worek is Professor of Mechanical Engineering at Texas A&M University–Kingsville, TX. He received all three degrees, B.S., M.S. and Ph.D. from the Illinois Institute of Technology in 1976, 1977 and 1980. He spent a majority of his career at the University of Illinois–Chicago, where he was Department Head of Mechanical and Industrial Engineering and Director of the Energy Resources Center.

He has been involved, over the last 35 years, in the development of desiccant materials for cooling systems applications, modeling of sorption processes, experimental testing of desiccant material performance and the use of desiccant processes in the design of cooling and dehumidification systems. He holds three patents on sorption system design improvements and has published extensively in archival journals and has given numerous lectures on the subject. Recently he has expanded his research to investigate the enhancement when nanofluids are boiled.

Professor Worek was chair of the American Society of Mechanical Engineer’s (ASME’s) Solar Energy Division, Vice-President of ASME’s Energy Resources Group and served as a Member of ASME’s Board of Governors. In addition, he is Fellow of ASME and ASHRAE and has received Edwin F. Church Medal from ASME recognizing his accomplishments in engineering education. In addition, Professor Worek Co-editor of Mark’s Handbook for Mechanical Engineering, Executive Editor of Applied Thermal Engineering and Editor-in-Chief of Heat Transfer - Asian Research.

Title: Challenges in Comfort Cooling: Separating Sensible and Latent Loads—Material Constraints and New Opportunities

As buildings have become tighter and as Net Zero Energy Buildings are designed and implemented, the latent cooling load has increased, and improved performing heating systems are desired. This presentation will present the status of current technologies and the efforts to improve performance and the capacity per unit volume (i.e., minimization of footprint) of heating and cooling systems. Conventional heating systems have limited efficiencies, many times less than one. Likewise, thermally-activated cooling/dehumidification systems also have relatively poor efficiencies. This presentation will focus on work done and new developments in materials and systems that are showing that performance can be significantly improved.

 

Tuesday, November 13

Applied Mechanics Koiter Lecture

5:30pm–6:30pm
Room 408, Donald L. Lawrence Convention Center

 M. Taher A. Saif

Professor M. Taher A. Saif, Edward William and Jane Marr Gutgsell Professor at the University of Illinois Urbana-Champaign

Professor M. Taher A. Saif received his B.S. and M.S. in Civil Engineering from Bangladesh University of Engineering and Technology and Washington State University, respectively, in 1984 and 1986. He obtained his Ph.D. in Theoretical and Applied Mechanics from Cornell University in 1993. He worked as a Post Doctoral Associate in Electrical Engineering and the National Nanofabrication Facility at Cornell University during 1993–1997. He joined the Department of Mechanical Science and Engineering at the University of Illinois at Urbana–Champaign (UIUC) during 1997. He is currently the Gutgsell Professor in the department. He is serving as the Associate Head of Graduate Programs and Research.

Two of Saif's major contributions are: (1) discovery of plastic strain recovery in nano grained metals and its underlying mechanism. The finding opens the possibility of developing self-healing metal components; (2) discovery of mechanical tension in neurons in vivo, and the link between this tension and neurotransmission. This latter finding links mechanical force with memory and learning in animals. His current research includes tumor micro environment, mechanics of neurons and cardiac cells, development of biological machines, and electro-thermo-mechanical behavior of nanoscale metals and semiconductors.

Saif is a Fellow of the American Society of Mechanical Engineers since 2011. He served as the President of the Society of Engineering Science during the calendar year 2016. He was a member of the Scientific Advisory Board, Singapore-MIT Alliance for Research and Technology during 2010–2012. He received the Xerox Award for Faculty Research from University of Illinois at Urbana–Champaign (UIUC) during 2003 and 2006. He was a Willett Faculty Scholar, College of Engineering, UIUC, during 2003–2009.

Title: Living Machines

The industrial revolution of the 19th century marked the onset of the era of machines that transformed societies. However, all of these machines are non-living and they do not have inherent intelligence. On the other hand, since the discovery of genes, there is a considerable body of knowledge on engineering living cells. It is thus appropriate to envision biohybrid machines that are made from engineered scaffolds and living cells. These machines have the potential of unprecedented capabilities, as they would carry the footprints of millions of years of evolution. These machines may emerge from an interaction between the living cells and the micro-nano scaffolds. In this talk, we will present such an elementary machine, a small scale swimmer, consisting of a soft slender string and rat cardiomyocytes. The string is made from a soft polymeric material by filling a microfabricated channel using capillary draw. Cells are cultured on one region of the string. These cells interact with the string as well as with each other and beat in synchrony as a single actuator. This living actuator bends the string, and a bending wave propagates from the actuator site toward the end, generating sufficient thrust for swimming. This artificial machine thus swims in fluids as the engineered living swimmer. These swimmers might be used in vivo for autonomous intelligent drug delivery.

Wednesday, November 14

Robert Henry Thurston Lecture

11:00am–12:00pm
Room 410, Donald L. Lawrence Convention Center
 

Title: Dynamic Behavior of Materials at High-Strain Rates and High-Pressures

Thurston Lecture Award to Guruswami (Ravi) Ravichandran for pioneering contributions to dynamic behavior of materials and development of novel experimental methods.

Dr. Guruswami Ravichandran, John E. Goode, Jr., Professor of Aerospace and Mechanical Engineering, Division of Engineering and Applied Science California Institute of Technology

 M. Taher A. Saif

Guruswami (Ravi) Ravichandran is the John E. Goode, Jr., Professor of Aerospace and Mechanical Engineering and the Otis Booth Leadership Chair of the Division of Engineering and Applied Science at the California Institute of Technology. He received his B.E. (Honors) in Mechanical Engineering from the University of Madras and his Sc.M. in Engineering and Applied Mathematics and Ph.D. in Engineering (Solid Mechanics and Structures) from Brown University. He has held visiting scholar appointments at Ecole Polytechnique, France (CNRS Senior Scientist), Tokyo Institute of Technology (Chair in International Cooperation), and Indian Institute of Science (Aditya Birla Chair). He is a member of the National Academy of Engineering, Academia Europea, and European Academy of Sciences and Arts. He is a Fellow of the American Society of Mechanical Engineers (ASME), Society for Experimental Mechanics (SEM), and American Academy of Mechanics (AAM). He was named Chevalier de l'ordre des Palmes Academiques by the Republic of France. His awards include A.C. Eringen Medal from the Society of Engineering Science, Warner T. Koiter Medal from ASME, and William M. Murray Lecture Award from SEM. His research interests include mechanics of materials (deformation, damage, and failure), dynamic behavior, wave propagation, composites, active materials, micro-/nanomechanics, biomaterials and cell mechanics, and experimental methods.

Title: Dynamic Behavior of Materials at High-Strain Rates and High Pressures

Impact, blast, and other dynamic loading events are of significance in numerous engineering applications ranging from aerospace to automotive to defense to security to space. At the heart of transient loading events are the propagation of stress/shock waves, which can cause significant deformation and catastrophic damage and failure. This lecture will focus on the dynamic behavior of materials, in particular, their high-strain rate and high-pressure properties. Experimental methods based on the split Hopkinson (Kolsky) compression bar and the plate impact technique are reviewed. These experimental methods have been used to investigate the dynamic material behavior under extreme conditions, strain rates ~1 million/s, and pressures ~100 GPa. Studies on the constitutive behavior of ductile metals using the shear-compression specimen are discussed. In situ temperature measurements using high-speed infrared thermography are used to determine the fraction of plastic work converted to heat. A plate impact technique based on the Mach lens concept to achieve high pressures is illustrated. For a given impact velocity, this technique can help increase the range of pressures for determining the equation of state for materials. Shock wave experiments in heterogeneous materials illustrating their ability to mitigate damage through dispersion are presented. Material parameters controlling the rise time of the shock and the effective viscosity are identified. Theoretical analysis and numerical simulations are used to gain insights into shock wave propagation in heterogeneous composite materials.