Abstract
Additive Manufacturing (AM) of carbon fiber (CF) reinforcedcomposite has received growing attention because of the designflexibility, superior mechanical properties, improved thermalproperties, and weight reduction. Autoclave tooling was provento be a successful application for large scale AM technology. Thecapital cost, and cost associated with heating, and cycle time ina conventional autoclave process is relatively high. Thus, aninnovative design of AM mold with an efficient heating schemeis essential. This study represents an innovative method of theresistive heating of composite molds which does not require aroom size oven for heating during the curing processing.Therefore, it has the potential to reduce the operating costdrastically. For the design validation and feasibility study, weperformed a numerical analysis of the wire embedded and AMmold parts. The goal of this study is to determine and optimizethe thermal behavior of the printed mold with embedded wiretechnology. It is anticipated that the larger distance between theembedded wires along the printing direction (z-direction)increase the cold spot, on the other hand, a close distance of thewire can create the unwanted localize heating, thus melting.Constant thermal properties of the 20 wt.% short CF reinforcedacrylonitrile butadiene styrene (ABS) was used for thesimulation purpose. Thermal characterization was set to 100°Cto avoid the thermal deformation or bulging on the part surface.
| Original language | English |
|---|---|
| Title of host publication | Advanced Manufacturing |
| Publisher | American Society of Mechanical Engineers (ASME) |
| ISBN (Electronic) | 9780791884485 |
| DOIs | |
| State | Published - 2020 |
| Event | ASME 2020 International Mechanical Engineering Congress and Exposition, IMECE 2020 - Virtual, Online Duration: Nov 16 2020 → Nov 19 2020 |
Publication series
| Name | ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE) |
|---|---|
| Volume | 2A-2020 |
Conference
| Conference | ASME 2020 International Mechanical Engineering Congress and Exposition, IMECE 2020 |
|---|---|
| City | Virtual, Online |
| Period | 11/16/20 → 11/19/20 |
Funding
This research is sponsored by the US Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office, under contract DE-AC05-00OR22725 with UT-Battelle LLC. This research was supported in part by an appointment to the Oak Ridge National Laboratory ASTRO Program, sponsored by the U.S. Department of Energy and administered by the Oak Ridge Institute for Science and Education. Material extrusion additive manufacturing (AM) or 3D printing of fiber-reinforced composite has enabled the direct and indirect fabrication of high performance and lightweight structures. Direct fabrication of fiber-reinforced of AM parts refers to those are made readily available for end-use applications such as engine bracket, rapid prototyping tool, sensor, embedded electronics, unmanned aerial vehicle’s component, boat hull, etc. [1]–[7]. On the other hand, indirect fabrication refers to the parts that are used for molding or tooling applications as such autoclave molds [8]. The inherent limitation of the extrusion-based AM part is the porosity and inferior mechanical strength along the z-axis [9]. Thus, direct fabrication of 3D printed parts for end-use applications is hindered (as they are needed to pass the quality control test), while the indirect fabrication of AM parts got much more attention in recent days for industrial applications. More specifically, AM of autoclave molds that can be used for resin curing during the autoclave process is an emerging field. The design freedom, a wide variety Notice: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC0500OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for the United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-
Keywords
- 3D printing
- Autoclave tooling
- Carbon fiber-reinforced composite
- Composite Mold
- Large Format Additive Manufacturing
- Numerical analysis
- Wire embedding