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Research Paper

A Study on the Mechanical behavior of 3D Printed Short-Fiber Reinforced Composite Structures using AM-Structural Coupled Analysis

AM 공정 연계 구조 해석을 활용한 단섬유 강화 복합소재 3D 프린팅 출력물의 기계적 거동 특성 분석

Geung-Hyeon Lee1
,
Da-Young Jang1
,
Chae-Rim Seon2
,
Minho Yoon3
,
Jang-Woo Han4*
이 긍현1
,
장 다영1
,
선 채림2
,
윤 민호3
,
한 장우4*
1Graduate Student, Department of Mechanical Engineering, Kumoh National Institute of Technology, Gumi, 39177, Korea
2Graduate Student, Department of Mechanical and Information Engineering, The University of Seoul, Seoul, 02504, Korea
3Associate Professor, Department of Mechanical and Information Engineering, The University of Seoul, Seoul, 02504, Korea
4Assistant Professor, School of Mechanical System Engineering, Kumoh National Institute of Technology, Gumi, 39177, Korea
1국립금오공과대학교 기계공학과 석사과정
2서울시립대학교 기계정보공학과 석사과정
3서울시립대학교 기계정보공학과 부교수
4국립금오공과대학교 기계시스템공학부 조교수
*Corresponding Author
31 October 2024. pp. 309-316
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Abstract

In this paper, additive manufacturing (AM)-structural coupled analysis was proposed to accurately predict the mechanical behavior of 3D printed short-fiber reinforced composite structures. Tensile specimens were printed using a composite 3D printer (Mark Two, Markforged), and tensile tests were conducted on specimens manufactured with various nozzle paths. In addition, a reverse engineering scheme was applied to the experimental data to reasonably derive local anisotropic material properties according to the nozzle paths. Consequently, AM-structural coupled analysis was performed using the enhanced finite element model with mapped local materials properties, and the mechanical behavior of the 3D printed short-fiber reinforced composite was accurately described. To demonstrate the effectiveness of the proposed AM-structural coupled analysis model, the computational results obtained were compared with experimental results.

Keywords
composite 3D printing
AM-structural coupled analysis
anisotropic material properties
nozzle path

본 논문에서는 3D 프린팅 공정을 통해 제작된 단섬유 강화 복합소재 구조물의 기계적 거동을 효과적으로 예측하기 위한 AM 공정 연계 구조 해석 기법을 제안하였다. 복합소재 3D 프린터(Mark Two, Markforged)를 활용하여 다양한 노즐 경로를 갖는 인장 시편을 출력하였으며, 출력물에 대한 인장 시험을 진행하였다. 또한, 노즐 경로에 따른 부위별 이방 물성을 도출하기 위해 실험적 데이터를 기반으로 역공학 기법을 적용하였다. 제안된 AM 공정 연계 구조 해석 방안의 타당성을 검증하기 위해 실험 결과와의 비교/분석을 병행하였으며, 부위별 이방 물성이 반영된 FE 모델을 바탕으로 AM 공정 연계 구조 해석을 수행함으로써 복합소재 3D 프린팅 출력물의 거동 양상을 정확하게 예측할 수 있음을 확인하였다.

키워드
복합소재 3D 프린팅
AM 공정 연계 구조 해석
이방적 소재 물성
노즐 경로
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Information
  • Publisher :Computational Structural Engineering Institute of Korea
  • Publisher(Ko) :한국전산구조공학회
  • Journal Title :Journal of the Computational Structural Engineering Institute of Korea
  • Journal Title(Ko) :한국전산구조공학회 논문집
  • Volume : 37
  • No :5
  • Pages :309-316
  • Received Date : 2024-06-20
  • Revised Date : 2024-07-11
  • Accepted Date : 2024-07-15
  • DOI :https://doi.org/10.7734/COSEIK.2024.37.5.309
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