MEMS Seminar: Jerry Qi, “Multimaterial Additive Manufacturing toward Shape Morphing Structures and 4D Printing”
Thomas Lord Department of Mechanical Engineering & Materials Science SPRING 2024 Seminar Series with Dr. Jerry Qi, Professor of Mechanical Engineering at Georgia Institute of Technology speaks on "Multimaterial Additive […]
Thomas Lord Department of Mechanical Engineering & Materials Science SPRING 2024 Seminar Series with Dr. Jerry Qi, Professor of Mechanical Engineering at Georgia Institute of Technology speaks on “Multimaterial Additive Manufacturing toward
Shape Morphing Structures and 4D Printing.”
ABSTRACT: 3D printing (additive manufacturing, AM) where materials are deposited in a layer-by-layer manner to form a 3D solid has seen significant advances in recent decades. 3D printing has the advantage in creating a part with complex geometry from a digit file, making them an ideal candidate for making architected materials. Multimaterial 3D printing is an emerging field in recent years in additive manufacturing. It offers the advantage of placement of materials with different properties in the 3D space with high resolution, or controllable heterogeneity. In this talk, we present our recent progress in developing multimaterial additive manufacturing methods. In the first approach, we present a new development where we integrate two AM methods, direct-ink-write (DIW) and digit light processing (DLP) into one system. In this system, the DLP can be used to print complex bulk parts while DIW can be used to print functional inks. In the second approach, we recently developed a grayscale DLP (g-DLP) 3D printing method where we can print a part with gradient material properties. We further explore how to use multimaterial 3D printing to fabricate shape morphing structures, including direct 4D printing of 2D lattice structures, lattice structures with changing shape driven by liquid crystal elastomers, and 3D lattice structures by gradient materials.
BIO: JERRY QI is professor of Mechanical Engineering at Georgia Tech and is site director of NSF IUCRC on Science of Heterogeneous Additive Printing of 3D Materials (SHAP3D). He received his undergrad and graduate degrees from Tsinghua University and a ScD degree from MIT. After one-year postdoc at MIT, he joined Univ. of Colorado Boulder as an asst. professor and moved to Georgia Tech in 2014. Prof. Qi’s research is in the broad field of nonlinear mechanics of polymeric materials and focuses on developing fundamental understanding of multi-field properties of soft active materials through experimentation and constitutive modeling then applying these understandings to application design.