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Conferences, Lectures, & Seminars
Events for November
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AME Seminar
Wed, Nov 03, 2021 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Canceled,
Talk Title: Canceled
Abstract: Dear all, due to the speaker having a family emergency, the November 3 seminar has been canceled.
Host: AME Department
Audiences: Everyone Is Invited
Contact: Tessa Yao
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Advanced Manufacturing Seminar
Fri, Nov 05, 2021 @ 11:00 AM - 12:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Shreyes N. Melkote, Georgia Institute of Technology
Talk Title: A Digital Apprentice for Machining Chatter Detection: Application of Learning from Human Demonstration
Abstract: Regenerative chatter in machining operations such as milling is a common process anomaly that limits productivity and part quality. Traditional approaches for addressing this anomaly include chatter avoidance methods based on off-line dynamic stability analysis, and on-line chatter detection and suppression through real-time sensing and control. Chatter avoidance methods require specialized knowledge and skills for dynamic system identification and suffer from uncertainty in the stability boundary identification. On-line chatter detection methods tend to suffer from a high number of false positives and cannot always reliably detect chatter before part/machine damage occurs. Consequently, manufacturers often rely on the auditory and cognitive abilities of experienced human operators to monitor and control the machining process. This talk will present recent work that is inspired by learning from human demonstration frameworks to enable effective milling chatter detection via human-machine interaction, which facilitates knowledge transfer from an experienced operator to a Digital Apprentice consisting of an audio sensor, a learnable skill primitive for chatter detection, and a human-machine interface. Experimental results evaluating the effectiveness of this approach for chatter detection will be presented and discussed.
Biography: Dr. Shreyes N. Melkote holds the Morris M. Bryan Professorship in Advanced Manufacturing Systems in the George W. Woodruff School of Mechanical Engineering at Georgia Tech. He serves as Associate Director of the Georgia Tech Manufacturing Institute and as Executive Director of the Novelis Innovation Hub at Georgia Tech. Dr. Melkotes current research interests are in robotic manufacturing, science of precision material removal processes, novel surface enhancement methods, and data-driven methods for cyber manufacturing. His research in these areas is actively supported by industry and government sponsors. He is a Fellow of the ASME, SME, and CIRP.
Host: Center for Advanced Manufacturing
More Info: Registration Link: https://usc.zoom.us/webinar/register/WN_iOnvGwluSO-vDE5VsyYzTQ
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: Registration Link: https://usc.zoom.us/webinar/register/WN_iOnvGwluSO-vDE5VsyYzTQ
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
AME Seminar
Wed, Nov 10, 2021 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Dimitri Papamoschou, UC Irvine
Talk Title: Development of a Linear Surface-Based Model for the Jet Noise Source
Abstract: The seminar will discuss an effort to formulate an elementary physical model for the jet noise source that can be used for practical prediction of aircraft noise. Although the present analysis is confined to a round single-stream jet, the basic principles can be extended to more complex configurations. The model is defined on a radiator surface at the rotational/irrotational boundary of the jet on which the footprint of the vortical eddies, including their convective speed, is captured. The models building block at a given frequency is a linear pressure event with random origin and random helical mode. The probability density function for the event's axial origin is derived from the statistics of coherent structures in shear layers. The distribution for the helical mode is currently empirical and driven by the need to match the polar directivity of sound emission in the far field. The generic form of the event is a self-similar wavepacket with convective speed based on the mean centerline velocity and shape parameters determined by least-squares matching of the far-field sound pressure level at a wide range of frequencies and polar angles. Initial results indicate that the model reproduces, in a qualitative sense, key statistics of the jet acoustic field, including the near-field space-time correlation, the broadening of the far-field spectral density with increasing polar angle from the jet axis, and the coherence between the near and far fields. For the latter, the analysis indicates that the rapid decline in the coherence with increasing polar angle is primarily due to the randomness of the event's axial origin.
Biography: Dimitri Papamoschou is a professor of mechanical and aerospace engineering at University of California, Irvine (UCI). He received his PhD in Aeronautics at Caltech. His research interests include compressible turbulence, jet and fan aeroacoustics, and advanced noise source imaging methods. In jet aeroacoustics, he has shown the potential for noise reduction by asymmetric distortion of the jet velocity field, a concept that has led to several patents. He has also developed low-cost predictive methods for this type of noise reduction based on a special formulation of the acoustic analogy. At UCI he has served in various administrative roles, including department chair, associate dean, and interim dean. He is a Fellow of the American Institute of Aeronautics and Astronautics (AIAA) and recipient of the 2017 AIAA Aeroacoustics Award. He serves as an associate editor of the AIAA Journal.
Host: AME Department
More Info: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
Webcast: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09Location: Seaver Science Library (SSL) - 202
WebCast Link: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Advanced Manufacturing Seminar
Fri, Nov 12, 2021 @ 11:00 AM - 12:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Hilmar Koerner, Air Force Research Laboratory
Talk Title: Disruptive Technologies in Support of Agile Processes for Air Force Applications
Abstract: Increased demand and competition require novel approaches in composite manufacturing. This includes the systematic use of machine learning and artificial intelligence tools and disruptive technologies in materials discovery, process monitoring and performance evaluation of composites. This presentation will cover examples from the Functional and Structural Materials Division of the Materials & Manufacturing Directorate of the Air Force Research Laboratory with a focus on additive manufacturing of polymer matrix composites.
Biography: Dr. Hilmar Koerner is a research lead at the Composites Branch, Structural Materials Division, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio. He leads a research team solving current challenges in polymer matrix composites, materials and processes, with focus on physics-based understanding of composite processing and materials discovery in high temperature thermosetting polymers. His research has made major impact in the field of high temperature polymer matrix composites for additive manufacturing. His expertise is in real-time measurements using advanced synchrotron sources of polymeric systems under highly non-equilibrium conditions.
Host: Center for Advanced Manufacturing
More Info: Zoom link (no registration needed): https://usc.zoom.us/j/94568980820?pwd=RzhSUFlZbXE5MWVKdGF3akZPc0Zidz09
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: Zoom link (no registration needed): https://usc.zoom.us/j/94568980820?pwd=RzhSUFlZbXE5MWVKdGF3akZPc0Zidz09
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Kanso Lab seminar
Tue, Nov 16, 2021 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Ramiro Godoy-Diana and Benjamin Thiria, PMMH lab at ESPCI Paris
Talk Title: Fish and Fish-Like Swimming Interactions
Abstract: The interaction between two neighboring swimmers forms the basis of the collective dynamics observed in a school of fish in nature. We will discuss different aspects of our recent work on swimmer-to-swimmer interactions, in which we have designed experiments with real fish or with simple robotic models, as well as numerical simulations, to examine the issues of swimmer synchronization, pattern formation, and energy expenditure, examining the most basic interactions between a pair of neighboring swimmers.
Biography: TBD
Host: Prof. Eva Kanso
More Info: https://usc.zoom.us/j/92868857794
Webcast: https://usc.zoom.us/j/92868857794Location: Olin Hall of Engineering (OHE) - 406
WebCast Link: https://usc.zoom.us/j/92868857794
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: https://usc.zoom.us/j/92868857794
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
AME Seminar
Wed, Nov 17, 2021 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Paul Kruger, Professor and Chair, Department of Mechanical Engineering, SMU
Talk Title: Additives in Extrusion-Based Additive Manufacturing
Abstract: Material additives in additive manufacturing (AM) can serve a variety of functions from improving the manufacturing process to adjusting material properties in the final build. This talk will discuss several uses of additives in extrusion-based additive manufacturing. The first focuses on using carbon-black-based additives in AM for silicones. Silicones have a range of desirable properties (durability, large elongation, bio-compatibility, etc.) that make them appealing for AM, but because they are thermosets, additional complexity is required to use them in AM, including in-situ curing of the material. In this work, carbon-black additives are shown to improve the print quality of silicone parts with UV-curing due to reducing disturbance of material deposition from electro-static forces, even though the concentration is too low to promote material conductivity. Carbon black is also shown to be an effective radiation absorbing agent, allowing for material heating via an infrared laser in printing of thermally-cured silicones.
The second considers metallic micro-spheres as additives to promote electrical conductivity at sufficient concentrations to create printable electrically conductive polymer composites (ECPCs). ECPCs are useful for providing electrical connections, resistors, or other electrical functionality in printed parts. But for high conductivity, high concentrations of particles are required, making extrusion of the composite material difficult. Investigation of the rheology of these materials will be presented, using non-Newtonian silicones as a surrogate for the molten polymers during printing. The results show that the composite materials behave like power-law materials with a strong dependence on the particle concentration and the ratio of the diameter of the extrusion tube/nozzle to the mean particle diameter. For particle diameter decreasing toward 1, the flow consistency index (effective viscosity) decreases and then sharply increases as particles begin to jam within the tube. A semi-empirical model reproducing these effects will be presented.
Stay after the seminar for a brief overview of graduate programs in Mechanical Engineering at SMU. Learn about research opportunities and unique degree programs including MS in Manufacturing Management and the direct admission PhD program.
Biography: Paul Krueger received his B.S. in Mechanical Engineering in 1997 from the University of California at Berkeley. He received his M.S. in Aeronautics in 1998 and his Ph.D. in Aeronautics in 2001, both from the California Institute of Technology (Caltech). In 2002 he joined the Mechanical Engineering Department at Southern Methodist University (Dallas, TX) where he is currently a Professor and department chair. He is a recipient of the Rolf D. Buhler Memorial Award in Aeronautics, the Richard Bruce Chapman Memorial Award for distinguished research in Hydrodynamics, the Faculty Early Career Development (CAREER) Award from the National Science Foundation (2004), and the Ford Senior Research Fellowship from SMU (2012). His research interests include unsteady hydrodynamics and aerodynamics, vortex dynamics, bio-fluid mechanics, bio-morphic propulsion, fluid-boundary and fluid-particle interactions, and fluid processes in additive manufacturing.
Host: AME Department
More Info: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
Webcast: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09Location: Seaver Science Library (SSL) - 202
WebCast Link: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Advanced Manufacturing Seminar
Fri, Nov 19, 2021 @ 10:00 AM - 11:30 AM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Michael C. McAlpine, University of Minnesota
Talk Title: 3D Printing Active Electronic & Optoelectronic Devices
Abstract: The ability to three-dimensionally pattern semiconducting electronic and optoelectronic materials could provide a transformative approach to creating active electronic devices without the need for a cleanroom or conventional microfabrication facilities. This could enable the generation of active electronics on-the-fly, using only source inks and a portable 3D printer to realize electronics anywhere, anytime, including directly on the body. Indeed, interfacing active devices with biology in 3D could impact a variety of fields, including
biomedical devices, regenerative biomedicines, bioelectronics, smart prosthetics, and human-machine interfaces. Developing the ability to 3D print various classes of materials possessing distinct properties will enable the freeform generation of active electronics in unique functional, interwoven architectures. Yet,
achieving seamless integration of these diverse materials via 3D printing is a significant challenge which requires overcoming discrepancies in material properties in addition to ensuring that all of the materials are compatible with the 3D printing process. We will present a strategy for three-dimensionally integrating diverse classes of materials using a custom-built 3D printer to fully create fully 3D printed device components built around active electronics. As a proof of concept, we have 3D printed quantum dot-based light-emitting diodes (QD-LEDs), polymer-based photodiodes on curvilinear surfaces, and hybrid devices over large scales with high yield. These results represent a critical step toward the 3D printing of high performance, active electronic materials and devices.
Biography: Michael C. McAlpine is the Kuhrmeyer Family Chair Professor of
Mechanical Engineering at the University of Minnesota. He received a B.S. (2000) in Chemistry with honors from Brown University, and a Ph.D. (2006) in Chemistry from Harvard University. His current research is focused on 3D printing functional materials & devices for biomedical applications, with recent breakthroughs in 3D printed deformable sensors and 3D printed bionic eyes (one of National Geographics 12 Innovations that will Revolutionize the Future of Medicine). He has received several awards for this work, including the Presidential Early Career Award for Scientists and Engineers (PECASE), and the National Institutes of Health Directors New Innovator Award.
Host: Center for Advanced Manufacturing
More Info: Please register for this webinar at: https://usc.zoom.us/webinar/register/WN_NUYrOOwrSf63AxH9mp7Nvw
Webcast: Please register for this webinar at: https://usc.zoom.us/webinar/register/WN_NUYrOOwrSf63AxH9mp7NvwWebCast Link: Please register for this webinar at: https://usc.zoom.us/webinar/register/WN_NUYrOOwrSf63AxH9mp7Nvw
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: Please register for this webinar at: https://usc.zoom.us/webinar/register/WN_NUYrOOwrSf63AxH9mp7Nvw
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor.
