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Journals / Politeknik Dergisi / 2019 / Cilt: 22 - Sayı: 4

Experimental Verification of Cell Shape-Collapse Relationships in Metallic Foams by Photoelasticity Method

ERSİN BAHÇECİ
YUSUF ÖZÇATALBAŞ
Pages
1101–1110
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

It was specified that the collapse at the end of the compression tests started mostly at these areas.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In the present study, the effect of cell morphology on mechanical properties in metallic foams with Al based closed cells was examined.
📊
Key Findings & Data:AlSi8Mg0.8 alloyed metallic foam materials were produced by the Powder Metallurgy (PM) method.
💡
Conclusion & Impact:It was specified that the collapse at the end of the compression tests started mostly at these areas.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Metallic foam · cell morphology · photoelasticity

Abstract

In the present study, the effect of cell morphology on mechanical properties in metallic foams with Al based closed cells was examined. AlSi8Mg0.8 alloyed metallic foam materials were produced by the Powder Metallurgy (PM) method. The elastic stresses and their distributions which were created by the compression load in the metallic foams, producing in similar density and different cell sizes were investigated by the photoelasticity method. The fracture and collapse mechanisms of the foaming materials, having the same density but different cell size and shape factor, exhibited discrepancy as well. The elastic stress concentrations and their distributions that were created by compression at the cell walls could be determined by the photoelasticity method. It was detected that the fringe orders in the photoelasticity images provided important and accurate information about the stress concentration areas at the foam walls. It was specified that the collapse at the end of the compression tests started mostly at these areas.

Özet

In the present study, the effect of cell morphology on mechanical properties in metallic foams with Al based closed cells was examined. AlSi8Mg0.8 alloyed metallic foam materials were produced by the Powder Metallurgy (PM) method. The elastic stresses and their distributions which were created by the compression load in the metallic foams, producing in similar density and different cell sizes were investigated by the photoelasticity method. The fracture and collapse mechanisms of the foaming materials, having the same density but different cell size and shape factor, exhibited discrepancy as well. The elastic stress concentrations and their distributions that were created by compression at the cell walls could be determined by the photoelasticity method. It was detected that the fringe orders in the photoelasticity images provided important and accurate information about the stress concentration areas at the foam walls. It was specified that the collapse at the end of the compression tests started mostly at these areas.

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Cite This Article

BAHÇECİ, E., ÖZÇATALBAŞ, Y. (2019). Experimental Verification of Cell Shape-Collapse Relationships in Metallic Foams by Photoelasticity Method. Politeknik Dergisi, Cilt: 22 - Sayı: 4, 1101–1110. https://ajindex.com/articles/306399

References (11)

  1. Hanssen, A.G., Langseth, M. and Happerstad, O. S., “Static and Dynamic Crushing of Circular Aluminium Extrusions with Aluminium Foam Filler”, Int. J. of Impact Eng. 24(5):475-507 (2000).
  2. Ruan, D., Lu, G., Chen, F.L., Siores, E. “Compressive Behaviour Of Aluminium Foams at Low And Medium Strain Rates. Composite Structures”, 57, 331–336 (2002).
  3. Yi Y., Zheng X., Fu Z., Wang C., Xu X., and Tan X., “Multi-Scale Modeling for Predicting the Stiffness and Strength of Hollow-Structured Metal Foams with Structural Hierarchy. MDPI Materials”, 11,380, 1-12 (2018).
  4. Jeon I., Asahina T., “The effect of structural defects on the compressive behavior of closed-cell Al foam”, Acta Materialia. 53, 12, 3415-3423 (2005).
  5. Jeon I., Katou K., Sonoda T., Asahina T., Kanga Ki-Ju., “Cell wall mechanical properties of closed-cell Al foam”, Mechanics of Materials. 41, 1, 60-73 (2009).
  6. Zhihua W., Hongwei M., Longmao Z., Guitong Y., “Studies on the dynamic compressive properties of open-cell aluminum alloy foams”, Scripta Materialia. 54, 1, 83-87 (2006).
  7. Tan P. J., Harrigan J. J., Reid S. R., “Inertia effects in uniaxial dynamic compression of a closed cell aluminium alloy foam”, 18, 5, 480-488 (2013). Marsavina L,, Kováčik J., Linul E., “Experimental validation of micromechanical models for brittle aluminium alloy foam”, Theoretical and Applied Fracture Mechanics. 83, 11-18 (2016).
  8. Sevostianov I., Kováčik J., Simančík F., “Elastic and electric properties of closed-cell aluminum foams: Cross-property connection”, Materials Science and Engineering: A. 420, 1–2, 87-99 (2006). Mines R. A. W., “On the Characterisation of Foam and Micro‐lattice Materials used in Sandwich Construction”, Strain An İnternational Journal For Experimental Mechanics. 44, 1 71-83 (2008).
  9. Singh R., Lee P. D., Lindley T. C., Kohlhauser C., Hellmich C., Bram M., Imwinkelried T., Dashwood R. J., “Characterization of the deformation behavior of intermediate porosity interconnected Ti foams using micro-computed tomography and direct finite element modeling”, Acta Biomaterialia. 6, 6, 2342-2351 (2010). Vishay Tech Note TN-702-2, “Introduction to Stress Analysis the PhotoStress Method”, 1–13, (2011).
  10. Ozer, A., Ozcatalbas, Y., “Measuring the residual/permanent stresses by using hole-drilling method and calibration of rosette strain-gauges”, J. Fac. Eng. Arch. Gazi Univ. 26(3), 657-666 (2011).
  11. Cevik, B., Ozer, A. ve Ozcatalbas, Y., “Analysis of Stress Generated in Fillet Welds by Using Photoelasticity Method”, 6th Internati