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Posted by: mus41 on Oct 26, 2016
Akhlesh Lakhtakia
Department of Engineering Science and Mechanics, PSU

Wednesday, November 2, 2016 3:35pm - 4:25pm
103 Leonhard Building
Posted by: mus41 on Oct 19, 2016
Amit Acharya
Department of Civil & Environmental Engineering, Carnegie-Mellon University

Wednesday, October 26, 2016 3:35pm - 4:25pm
103 Leonhard Building

Abstract:
Terminating lines of surfaces of discontinuity serve as a model of common line defects that arise in a host of materials; dislocations and grain/phase boundary junctions in crystalline and soft matter. I will describe a framework for considering line defect dynamics within continuum mechanics. The theory will be illustrated with examples related to dislocation dynamics with inertia, dislocation nucleation, and the computation of fields of interfacial defects like the star disclination and grain boundary disconnections.

Bio:
Amit Acharya is a Professor in the Mechanics, Materials, and Computing group of the Department of Civil & Environmental Engineering at Carnegie Mellon University (CMU). He also holds a courtesy appointment in the Dept. of Materials Science and Engineering at CMU and a Visiting Professorship in the Dept. of Mathematical Sciences at the University of Bath, UK. He received a PhD degree in Theoretical & Applied Mechanics from the University of Illinois at Urbana-Champaign (UIUC) in 1994. Subsequently, he did post-doctoral work for a year at the University of Pennsylvania and then worked for HKS, Inc. in Providence, RI (now Simulia, Dassualt Systemes) from 1995-1998, spending most of his time as a senior research engineer in the ABAQUS Std Development group. There, he was the lead developer of the *Hysteresis nonlinear viscoelastic material model and the S4, fully-integrated finite strain shell element, that are still in use in the ABAQUS general-purpose FE code. From 1998-2000, he was a Research scientist at the DOE-ASCI funded Center for Simulation of Advanced Rockets at UIUC, before joining CMU in 2000.
His honors include a Leverhulme Visiting Professorship from the Leverhulme Foundation, UK, a Rosi and Max Varon Visiting Professorship from the Weizmann Institute, Israel, and an INdAM Visiting Professorship to the University of Pavia, Italy. He has been an invited short-course lecturer at SISSA (Trieste, Italy) and has held visiting research positions at Oxford, Cambridge, Marseille, Edinburgh, and Metz.
His broad research interests are in Continuum Mechanics, Mathematical Materials Science, and Applied Mathematics. Current emphasis is on theoretical and computational defect mechanics in crystalline, liquid crystalline, and metallic glass systems, coarse-graining of nonlinear time-dependent systems and the interplay of differential geometry and structural mechanics in the design and actuation of thin sheets.
Posted by: mus41 on Oct 12, 2016
Robert J. Beaury
School of Engineering Design,Technology and Professional Programs, PSU

Wednesday, October 19, 2016 3:35pm - 4:25pm
103 Leonhard Building

Abstract:
The direct definition of entrepreneurship speaks to starting a new business. Developing an entrepreneurial mindset is critical to the success of that effort but it is also critical to a wide range of endeavors, both professional and personal.
This seminar will explore what is an entrepreneurial mindset and how it translates to creative thinking, solving real-world problems, innovation and living a more complete and interesting life.
The objective of the seminar will be to demonstrate how adopting entrepreneurial skills will benefit any individual regardless of their career aspirations. We will begin by exploring the history of entrepreneurship and the personality type and skill set of a classic entrepreneur. We will then challenge the participants to work on a series of exercises related to the development of an entrepreneurial mind-set.

Bio:
Bob has been an Instructor in the College of Engineering since 2001, teaching classes in the Engineering Entrepreneurship & Leadership Minors, including classes in the new Masters in Leadership program. In January of 2015, Bob became the Interim Director of the Engineering Entrepreneurship Minor.
Bobís approach to teaching is based upon experiential, problem based-learning. Students work in teams to solve real-world problems that have no easy answer in a competitive environment. Creativity and innovation are key components to Bobís classes, and several successful businesses have started as a byproduct of Bobís classes, including OrderUp and Diamondback Truck Covers. In the spring of 2016 Bob won one of the prestigious George W. Atherton Excellence in Teaching Awards.
Prior to his work at Penn State, Bob was the CEO and President of Broadband Networks (BNI) a technology start-up that designed and built distance learning networks. BNI was acquired by NumereX in 1997.
Bob is currently a member of the Board of Directors of several companies including Restek, Rockland Manufacturing and Diamondback. He is also a co-Founder of Xsalta, a web marketing company focused on helping mental health professionals create awareness of a revolutionary treatment for depression named Transcranial Magnetic Stimulation.

Posted by: mus41 on Oct 5, 2016
Jing Du
Department of Mechanical and Nuclear Engineering, PSU

Wednesday, October 12, 2016 3:35pm - 4:25pm
103 Leonhard Building

Abstract:
Caries, which lead to partial or total loss of teeth, influence almost 100% adults and 60-90% of school children. To restore the function and appearance of teeth, dental crowns have been adopted as a common treatment. However, the strength and fatigue life of the crowns are not satisfactory due to many reasons. Natural teeth have superior performance both in strength and durability to the artificial dental structures. In this study, inspired by the crack resistance of the functionally graded structure of natural teeth, a bio-inspired design of functionally graded dental material was proposed to replace the conventional dental adhesive material. Numerical models were used to optimize the design. Guided by the models, nanocomposite materials were used to fabricate these graded structures. Under Hertzian contact loading, they had ~20Ė30% higher critical loads than conventional dental multilayers at various clinically relevant loading rates. The critical loads were also well predicted by fracture mechanics models that integrated the nanoindentation measurements and creep test of the fabricated graded materials. The failure modes of the structure were also investigated to make connections to the clinical failure modes of dental crowns.

Bio:
Dr. Jing Du is an assistant professor of mechanical engineering at Penn State University. She received her B.S. and M.S. degrees in Mechanical Engineering and Materials Science and Engineering, respectively, from Tsinghua University and a Ph.D. degree in Mechanical & Aerospace Engineering from Princeton University. Before joining Penn State, she was a postdoctoral scholar in the School of Dentistry at the University of California, San Francisco (UCSF). Her research focuses on solid mechanics and materials science. Her current areas of research interests include mechanics of biological materials and biomaterials, biomedical devices and bio-inspired design.