3D 프린팅 된 탄소 단섬유강화 복합재료의 후처리 효과가 재료의 기계적 성능에 미치는 영향
Effect of Post-processing on Mechanical Properties of 3D Printed Carbon Chopped Fiber Reinforced Composites
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
상용 FFF (Fused filament fabrication) 3D 프린터로 제조된 탄소 단섬유강화 나일론 복합재료 구조의 내부 채움 패턴(Infill pattern)의 높은 공극률은 프린팅 된 구조의 기계적 성능을 결정한다. 본 연구는 프린팅 된 구조의 내부 채움 패턴의 공극률을 줄여서 기계적 특성을 개선하기 위해 사각형 내부 채움 구조로 제작된 Onyx 복합 재료 시편의 열압밀 조건에 따른 시편의 기계적 성능을 실험적으로 평가하고, 가장 우수한 기계적 물성을 유도하는 열압밀 공정 조건(145oC, 4 MPa, 12 min)을 찾았다. 현미경 관찰결과 열압밀 후처리를 겪은 복합재료 시편의 내부 채움 공극률이 효과적으로 줄어듦을 확인하였다. 후처리된 시편의 기계적 성능을 확인하기 위해, 후처리를 하지 않은 대조군 시편과, 후처리 후 밀도와 치수를 동일하게 설정하여 출력한 시편과 함께 인장시험 및 3점 굽힘시험을 수행하여 기계적 물성을 비교한 결과 열압밀 후처리를 수행한 경우 기계적 물성이 효과적으로 개선되는 것을 확인하였다.
Abstract
The high porosity of the infill pattern of carbon chopped fiber-reinforced Nylon composite structures fabricated by the fused filament fabrication (FFF) type 3D printers determines the mechanical performance of the printed structures. This study experimentally evaluated the mechanical performance of Onyx composite specimens fabricated with a rectangular infill structure under the hot-pressing condition to improve the mechanical properties by reducing the porosity of the infill pattern of the printed structure, and evaluated the best mechanical performance. The hot-pressing conditions (145oC, 4 MPa, 12 min) that induce the most appropriate mechanical properties were found. As a result of microscopic observation, it was confirmed that the infill porosity of the composite specimens subjected to post hot-pressing treatment was effectively reduced. In order to confirm the mechanical performance of the post-treated specimen, a tensile test and a three-point bending test were performed with a control specimen without post-treatment and a specimen printed with the same density and dimensions after post-treatment to evaluate the mechanical properties. As a result of comparison, it was confirmed that the mechanical properties were effectively improved when the post-treatment of hot-pressing was performed.
참고문헌 (28)
- Thompson, M. K., "Design for Additive Manufacturing : Trends, Opportunities, Considerations, and Constraints", Cirp Annals, 65(2), pp.737~760 (2016)
- Dizon, J. R. C., "Mechanical Characterization of 3D-printed Polymers", Additive Manufacturing, 20, pp.44~67 (2018)
- Lu, B., "Development Trends in Additive Manufacturing and 3D Printing", Engineering, 1(1), pp.85~89 (2015)
- De Leon, A. C., "High Performance Polymer Nanocomposites for Additive Manufacturing Applications", Reactive and Functional Polymers, 103, pp.141~155 (2016)
- 백운경, "열경화성 연속섬유 복합재를 이용해 외측 보강된 3D 프린팅 열가소성 복합재 구조물의 굽힘 특성 향상에 대한 연구", Composites Research, 34(2), pp.136~142 (2021), 한국복합재료학회[DOI]
- Wang, P., "Preparation of Short CF", GF Reinforced PEEK Composite Filaments and Their Comprehensive Properties Evaluation for FDM-3D Printing, 2020, pp.198, 108175~
- Manapat, J. Z., "High-strength Stereolithographic 3D Printed Nanocomposites : Graphene Oxide Metastability", ACS Applied Materials & Interfaces, 9(11), pp.10085~10093 (2017)
- Advincula, R. C., "Additive Manufacturing for COVID-19 : Devices, Materials, Prospects, and Challenges", MRS Communications, 10(3), pp.413~427 (2020)
- 오은영, "3D 프린터용 복합재료 연구 동향", Composites Research, 31(5), pp.192~201 (2018), 한국복합재료학회
- Kabir, S. M. F., "The Road to Improved Fiber-reinforced 3D Printing Technology", Technologies, 8(4), pp.51~ (2020)
- Saeed, K., "Characterization of Continuous Carbon Fibre Reinforced 3D Printed Polymer Composites with Varying Fibre Volume Fractions", Composite Structures, 282, pp.115033~ (2022)
- Fernandez-Vicente, M., "Identifying Limitations for Design for Manufacturing with Desktop FFF 3D Printers", International Journal of Rapid Manufacturing, 5(1), pp.116~128 (2015)
- Somireddy, M., "Analysis of the Material Behavior of 3D Printed Laminates via FFF", Experimental Mechanics, 59(6), pp.871~881 (2019)
- Elkaseer, A., "Experiment-based Process Modeling and Optimization for High-quality and Resource-efficient FFF 3D Printing", Applied Sciences, 10(8), pp.2899~ (2020)
- Kubota, M., "Effect of Buildup Orientations and Process Parameters on the Tensile Strength of 3D Printed Short Carbon Fiber", PA-6 Composites, 2022, pp.31(2), 119~136
- Blok, L. G., "An Investigation into 3D Printing of Fibre Reinforced Thermoplastic Composites", Additive Manufacturing, 22, pp.176~186 (2018)
- Bárnik, F., "Comparing Mechanical Properties of Composites Structures on Onyx Base with Different Density and Shape of Fill", Transportation Research Procedia, 40, pp.616~622 (2019)
- Impens, D., "Assessing the Impact of Postprocessing Variables on Tensile and Compression Characteristics for 3D Printed Components", IFAC-PapersOnLine, 48(3), pp.652~657 (2015)
- Pascual-González, C., "Postprocessing Effects on Microstructure, Interlaminar and Thermal Properties of 3D Printed Continuous Carbon Fibre Composites", Composites Part B : Engineering, 210, pp.108652~ (2021)
- Stava, O., "Stress Relief : Improving Structural Strength of 3D Printable Objects", ACM Transactions on Graphics (TOG), 31(4), pp.1~11 (2012)
- Arefin, A. M. E., "Polymer 3D Printing Review : Materials, process, and Design Strategies for Medical Applications", Polymers, 13(9), pp.1499~ (2021)
- Žigon, J, "Surface Finishing of 3DPrinted Polymers with Selected Coatings", Polymers, 12(12), pp.2797~ (2020)
- Kumar, K., "An Experimental and Theoretical Investigation of Surface Roughness of Poly-jet Printed Parts : This Paper Explains How Local Surface Orientation Affects Surface Roughness in a Poly-jet Process", Virtual and Physical Prototyping, 10(1), pp.23~34 (2015)
- Hetrick, D. R., "Void Content Reduction in 3D Printed Glass Fiber-Reinforced Polymer Composites through Temperature and Pressure Consolidation", Journal of Composites Science, 6(5), pp.128~ (2022)
- Karakurt, I., "3D Printing Technologies : Techniques, Materials, and Post-processing", Current Opinion in Chemical Engineering, 28, pp.134~143 (2020)
- Kabir, S. M. F., "The Road to Improved Fiber-reinforced 3D Printing Technology", Technologies, 8(4), pp.5~ (2020)
- "ASTM D638, Standard Test Method for Tensile Properties of Plastics", ~
- "ASTM S. Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials. ASTM D790", Annual Book of ASTM Standards, ~ (1997)