Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Analysis of 3D Geometry and Compressive Behavior of Aluminum Open Cell Foam Using X-ray Micro CT

마이크로 X-ray CT를 활용한 알루미늄 개방형 폼의 형상 및 압축 거동 분석

  • 김영일 (한국기계연구원 부설 재료연구소 변형제어연구그룹) ;
  • 김지훈 (한국기계연구원 부설 재료연구소 변형제어연구그룹) ;
  • 이종국 (현대자동차 중앙연구소 기반기술연구팀) ;
  • 김대용 (한국기계연구원 부설 재료연구소 변형제어연구그룹)
  • Received : 2011.09.15
  • Accepted : 2011.10.18
  • Published : 2011.11.01
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Abstract

The three dimensional geometries of an aluminum open cell foam before and after uniaxial compressive loading were investigated using the X-ray micro CT(computed tomography). Aluminum 6101-T6 open cell foams of 10, 20, 40 ppi (pore per inch) were considered in this work. After the serial sectioning CT images of aluminum foams were obtained from non-destructive X-ray images, the exact 3D structure were reproduced and visualized with commercial image processing program. The relative density ratio was around the 7.0 to 9.0 range, the unit cells showed anisotropic shapes having the different dimensional ratios of 1.1 to 1.3 between the rise and the transverse directions. The yield stress increased with the relative density ratio and the volumetric strain increased proportionally with compressive strain. The plateau stress in the compressive stress-strain curve was caused by the buckling of ligaments.

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References

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