1. Research student at ITA, RWTH Aachen University
During my visiting research at RWTH Aachen ITA (Institute for Textile Technology) in Germany, I had learned
① The operating mechanism of the weaving loom
② Setting up the conventional weaving loom for 3D woven fabrics
③ Fabricating complex-shaped 3D woven carbon preforms with
the narrow needle loom (Double cantilever beam, blade structures)
④ Composite molding skills (VaRTM and VAP®)
⑤ Micro and mesoscale analysis of the 3D woven composite with TexGen and ABAQUS
② Setting up the conventional weaving loom for 3D woven fabrics
③ Fabricating complex-shaped 3D woven carbon preforms with
the narrow needle loom (Double cantilever beam, blade structures)
④ Composite molding skills (VaRTM and VAP®)
⑤ Micro and mesoscale analysis of the 3D woven composite with TexGen and ABAQUS
⑥ Facilitating a meeting with a different company
- Period: Mar. 2022 - Aug. 2022
- Supported by KIAT (Korea Institute for Advancement of Technology)
2. 1/4 scale prototyping of compressor blades wtin fibre-reinforced composite
In this project, my task involved re-designing the composite blade and creating engineering drawings of composite plies with CATIA. In addition, I performed blade analysis with ABAQUS. Specifically, my job was
① Re-modeling the composite blade structure with Fusion 360
② Making engineering drawings of composite plies with CATIA and AutoCAD
③ Analysis of the composite blade structure with ABAQUS
- Period: Jul. 2021 - May. 2022
- Collaborated with DOOSAN ENERBILITY
3. Team leader of I-GPS (Inha Group for Problem Solving)
In this project, the research scope has been expanded from SiC/SiC to C/SiC. In addition, our team has employed CNF to enhance the mechanical properties of C/SiC composites processed by the liquid silicon infiltration (LSI) method. We have successfully validated the reproducibility of the improved mechanical properties of C/SiC by applying CNF. The following tasks are my contributions.
① Dispersing CNF uniformly into the phenolic resin by using various techniques
② Optimizing the fabrication process of CFRP laminates by vacuum-bag only (VBO) method
③ Fabricating C/SiC composites
④ Measuring mechanical properties based on ASTM standards & Data
analysis and visualization via Python
⑤ Investigating microstructures of the composites by SEM and XRD
⑥ Modeling the composite unit cell structure and the fabrication process
⑦ Identifying the causes of the enhanced mechanical properties
- Period: Jen. 2021 - Feb. 2022
- Collaborated with KOLON DACC COMPOSITE
4. Undergraduate research student
To measure the mechanical properties of Glass/Phenolic composites, several mechanical tests were conducted based on ASTM standards. The composites were made by resin transfer molding (RTM) method.
① Measuring tensile properties based on ASTM D638
② Measuring compressive properties based on ASTM D695
③ Measuring flexural properties based on ASTM D790
- Period: Sep. 2020 - Feb. 2021
5. Team member of I-GPS
One of the problems with the LSI method is that large cracks form after pyrolysis. These cracks cause Si pool inside SiC matrix-based ceramic matrix composites (CMCs). The Si pool deteriorates the mechanical properties and heat resistance of CMCs. For this reason, our team conducted a feasibility study to reduce these cracks and increase the mechanical properties of SiC/SiC composites processed by the LSI method, utilizing CNF. In this project, we learned
① Background knowledge of the fabrication process and characteristics of
SiC/SiC composites
② Si infiltration mechanism
③ Various techniques to disperse CNF in the phenolic resin uniformly
④ Characteristics of thermoset and thermoplastic resin
- Period: Mar. 2020 - Nov. 2020
- Collaborated with KIER (Korea Institute of Energy Research)