Short Course, Sunday September 8, 1:00PM–4:30PM, Rye, Level 3
Course Title: Mechanics Under the Fold: How to Use Origami to Architect Desirable Material and Structural Properties?
Description: Since their creation many centuries ago, origami has gone through explosive evolutions in its beauty and complexity. The seemingly infinite possibilities of developing 3D geometries via folding have inspired many deployable systems that are starting to shape our modern lives. However, current state of the art primarily focuses on exploiting the kinematics (or geometry) of folding without considering the elastic deformations or dynamic responses. Therefore, we are just scratching the surface of the potential offered by infusing this inspiring ancient art into engineered systems.
This short course aims to teach the fundamentals of an emerging domain: folding-induced mechanics and dynamics. That is, how to use the intricate origami geometry to architect desirable and nonlinear mechanical properties like negative Poisson’s ratio, negative stiffness, and multi-stability. We will discuss how to formulate reduced-order mechanics models for the origami structures and explore how these folding-induced properties can apply to mechanical metamaterials, adaptive structures, and soft robots.
This short course includes different modules, including short presentations, hands-on folding exercises, numerical modeling tutorials, and poster sessions with questions and answers.
The audience will get a chance to
- Obtain a big picture overview of the history and future of origami engineering
- Understand the fundamentals in folding-induced mechanics and dynamics
- Practice folding, both hands-on and using numerical simulation
- Explore potential research ideas and foster future collaborations
Intended Audience: The attendees of ASME SMASIS2019 conference, including faculty, industry experts, graduate students, and senior undergraduate students, are the intended audience.
Course Level: The attendees are expected to have at least a senior undergraduate level of expertise in solid mechanics and system dynamics.
Course Length: Half-day (3.5 hours)
Biography: This course will be taught by Dr. Suyi Li from Clemson University. Dr. Suyi Li is an assistant professor of mechanical engineering at Clemson University. He received his Ph.D. at the University of Michigan in 2014. After spending two additional years at Michigan as a postdoctoral research fellow, he moved to Clemson in 2016 and established a research group on dynamic matters. His technical interests are in origami-inspired adaptive structures, multi-functional mechanical metamaterials, and bio-inspired robotics. Within less than four years at Clemson, Dr. Li has secured close to two million dollars of research funding from NSF, including the prestigious CAREER award. His paper on fluidic origami received the Best Paper Award by the ASME Branch of Adaptive Structures and Material Systems.
Additional Comments: It is recommended, but not required, to have a laptop with a MATLAB license to take full advantage of the hands-on portion of the tutorial.
Short Course, Sunday September 8, 1:00pm - 4:30pm, Barley, Level 3
Course Title: Shape Memory Alloys: Behaviors, Modeling, Analysis, and Design
Description: Shape memory alloys are one of the most investigated active materials because of their impressive ability to recover large strains under high loads, and new application concepts are constantly being introduced. This course will provide engineers and researchers with a background in the response of these unique metals, especially as compared with other active materials. The empirical understanding developed will then be used to motivate one-dimensional mathematical constitutive models, one derived directly from experiments and a second considering thermodynamic constraints. Three-dimensional finite element analysis techniques will be reviewed, and design case studies from the aerospace and medical sectors will be presented and discussed. Attendees will be provided with working finite element models (Abaqus-based) and associated user instructions to continue their own investigations.
Learning Outcomes: By the end of the course, attendees will:
- Understand the engineering responses of SMAs and how these enable unique applications
- Be able to derive one-dimensional constitutive models based on both experimental data and thermodynamic constraints
- Have exposure to the finite element analysis of three-dimensional SMA components and have the ability to run their own analyses
- Understand multiple case studies regarding the design of SMA components and applications.
Intended Audience: Graduate students with background in the mechanics of materials; M.S. and Ph.D. researchers in both academia and industry; all those interested in the potential of shape memory alloys
Course Level: Course will be taught at the graduate level
Course Length: Half day (3.5 hours); 0.35 CEU
Biography: This course will be taught by Dr. Darren Hartl (Ph.D. 2009, Texas A&M Aerospace Engineering). Dr. Hartl is an Assistant Professor at Texas A&M, and his work bridges the topics of advanced multifunctional material systems and their integration into aerospace platforms. Before his return to academia, Dr. Hartl held joint appointments at the Air Force Research Laboratory (AFRL) in the Materials and Manufacturing Directorate and Aerospace Systems Directorate. He has over 17 years of experience working with shape memory alloys (SMAs) and morphing structures and has co-authored 165 technical publications on the topics of active materials modeling, testing, and integration into morphing structures, most of these related to SMAs. He serves as an Associate Editor for the Journal of Intelligent Material Systems and Structures and was selected as the 2016 recipient of the ASME Gary Anderson Early Achievement Award. He is Chair of the ASME Adaptive Structures and Materials Systems Branch.
Additional Comments: The provided Abaqus-based finite element input files are intended to serve as a hands-on computational lab activity to be undertaken after conclusion of the course. However, should students bring their own devices and have access to Abaqus (e.g., via Remote Desktop, etc.), accommodations will be made for real-time support of these activities.
For those interested in background study and prior preparation, Chapters 1–3 of the Shape Memory Alloy textbook by Lagoudas et al. will be most useful. This text is available for free to many organizations here.