Shu Chang holds the Melbert B. Cary Jr. Distinguished Professorship. Her research identifies techniques to bridge the system aspects of conventional digital printing to the rapidly growing field of additive manufacturing. She is currently developing techniques where one can design properties such as hardness or elasticity that a fabricated object requires by identifying structures and combinations of materials created during the printing process.
Prior to joining RIT, Shu worked in printing technology research and development at Xerox for over 20 years. Her work at Xerox spanned from printing technologies and materials science research to sustainability in printing and market explorations. Her expertise extends to process and materials systems, lean six sigma, modeling and simulation, and materials characterizations. Shu holds over 25 U.S. Patents and patent applications as well as over 40 publications.
Shu loves gardening, walking dogs (mostly borrowed canines from neighbors), hiking, and knitting (with her own designs).
Integrating Functions and Structures into Clothing
- Exploring the workflow and techniques to integrate functionality and structure into flexible substrates for clothing through combined research and classroom experiences.
- Establish the integration workflow in incorporating functionality and structure into aesthetics associated with fabrics and clothing.
- The project is to establish design and implementation procedures for interactive clothing applications.
Current Research: Digital Material Structures
Characterizing microstructures of additive manufactured materials at different stages of the 3-D printing process. The goal of this project is to assess the impact of the material deposition process on the material properties of the part.
- In comparison to conventional manufacturing, additive manufacturing (or 3D printing) has the advantage of lower energy use, fewer resource demands, lower carbon emissions and pollution .
- To produce parts, additive manufactured materials must meet the requirements of the product’s intended function.
- The material properties of the part depend on the microstructures that result from the fabrication or deposition process.
- It is critical to understand the impact of the manufacturing deposition process on the material performance of the part.
Characterizing Digital Materials
- The project assesses the impact of the process of material deposition on the properties of resulting parts.
- Understanding how the material deposition process impacts the 3D print material properties.
- The project will answer the question of how the additive process itself will impact the final material performance.
Current Research Project: GETTs
Reducing Energy and Materials Usage: 3D printing part characterization for quality assurance
The project will design and characterize test artifacts that can assess the ability of 3D printing technologies to produce parts with the intended geometry and performance.
- In comparison to conventional manufacturing, additive manufacturing (or 3D printing) reduces energy use, resource demands, carbon emissions and pollutants .
- There is a need to assess the capability of various technologies to reliably produce parts as designed in order to increase yield and lower waste.
- Current test artifacts are complex and do not provide metrics to compare different technologies.
- There is a need to provide metrics to manufacturers to assess the ability of different technologies to produce parts that meet their product’s requirements.
As technologies advance in the field of additive manufacturing (AM), it increases the demand in using test targets to quantitatively appraise the performance of AM processes and parts. This study presents a unique concept to address the dimensional and geometric viability of three-dimensional (3D) printers with test targets that are unique and complementary to those currently available. We have named these distinct designed artifacts as Geometric Element Test Targets (GETTs). The concept for the targets is to rely on positioning and spatial frequency of geometric shapes to induce failures that are indicative of the system’s dimensional limitations. A distinguishing characteristic is that the dimensional failures can be inspected visually. Systematic evaluations of the limitations can be further conducted through contact or non-contact measurements. We will illustrate this concept with samples produced with fused deposition modeling printers. The potential applications of GETTs include standardization, reference targets, in-line system control, and more.
Graph Expo 2014 press release
NextPrint Laboratory of School of Media Sciences at Rochester Institute of Technology is taking on 3D printing research.
Since Dr. Shu Chang joined the School of Media Sciences last fall as the Melbert B. Cary Jr. Distinguished Professor, she has been establishing her research facility and growing her group. As her research goal is to bridge system aspects of conventional digital printing to the rapidly growing field of 3D printing, her initial focus has been to develop characterization techniques to assess materials microstructures in a fabricated object. Her future goal will be to increase the types of materials that one can print in order to fabricate novel materials systems and devices in the fields of biology, medicine, and electronics.
During the past year, Dr. Chang has welcomed Nathan Ostrout, Heng Li, and Di Bai, all seeking a Master of Science degree in the School of Media Sciences, into her research group. In addition, Vineeth Patil, a second year graduate student, is currently finishing his thesis in the RIT’s Materials Science and Engineering program. Dr. Chang’s group has produced one peer reviewed publication in Powder Technology and two publications in the proceedings of the Solid Free Form Symposium and the NIP30 Digital Fabrication and Digital Printing.
Dr. Chang’s laboratory has attained a Keyence Digital Microscope VHX-5000 that is capable of imaging surface topography and measuring 3D artifacts, a Lutsbot 3D fused deposition modeling 3D printer, a MakerBot digitizer, and just recently in August a Fuji Dimatix Materials Printer DMP-3000. In addition, Dr. Chang is co-developing a powder deposition apparatus with the PRISM lab of RIT’s College of Engineering. Her research group also enjoys access to many other research facilities on the RIT campus, including the Brinkman’s lab (College of Engineering) which has a variety of 3D manufacturing printers and a Confocal Laser Scanning Microscope (College of Science).
Prior to joining RIT, Dr. Chang worked in printing technology research and development at Xerox for almost 25 years. Her work at Xerox spanned from printing technologies and materials science research to sustainability in printing and market explorations. Her expertise extends to process and materials systems, lean six sigma, modeling and simulation, and materials characterizations. Shu holds over 25 U.S. Patents and patent applications as well as 45 publications.