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

Yıl 2019, Cilt: 22 Sayı: 4, 1101 - 1110, 01.12.2019

Ersin Bahceci , Yusuf Ozcatalbas

https://doi.org/10.2339/politeknik.490993

Öz

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.  

Anahtar Kelimeler

Metallic foam, cell morphology, photoelasticity, stress distribution, collapse

Kaynakça

• 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).
• 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).
• 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).
• 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).
• 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).
• 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).
• 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).
• 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).
• 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).
• 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).
• Cevik, B., Ozer, A. ve Ozcatalbas, Y., “Analysis of Stress Generated in Fillet Welds by Using Photoelasticity Method”, 6th International Advanced Technologies Symposium (IATS’11). Elazığ. Turkey. 409-414, (2011).
• Bahceci, E. and Ozcatalbas, Y., “Microstructural Characterisation Of The AlSiMg Alloy Metallic Foams Produced With P/M Method”, IN-TECH 2013. Budapest. Hungary. 459-463 (2013).
• Guarino S., Di Ilio G., and Venettacci S., “Influence of Thermal Contact Resistance of Aluminum Foams in Forced Convection: Experimental Analysis”, MDPI Materials. 10, 907, 1-14 (2017).
• Gibson, L. J. and Ashby, M. F., “Cellular Solids: Structure and Properties-Second edition”, Cambridge University Press. UK. 175-308 (1997).
• Kim, A., Hasan, M.A., Nahm, S.H. and Jun, Y.D., “Compressive Mechanical Properties of Closed Cell Al-Si-Cu-Mg Alloy Foams”, Int. conference on mechanical engineering. Bangladesh. 1-6 (2003).
• Raj, R.E. and Daniel, B.S.S., “Structural and Compressive Property Correlation of Closed-Cell Aluminium Foam”, Journal of Alloys And Compounds. 467, 550-556 (2008).
• Degischer, H.P. and Kriszt, B., “Handbook of Cellular Metals: Production, Processing and Applications”, Wiley-VCH. Weinheim. 1-363 (2002).
• Bahceci, E., “Effect of cell morphology on mechanical properties of closed cell metal foams and usability of photoelasticity method”, University of Gazi Science Enstitute. Ankara. 106-117 (2012).
• Kaufman, J. Gilbert and Rooy Elwin L., “Aluminum Alloy Castings: Properties, Processes, and Applications”, ASM International, 120 (2004).
• Nafisi S., Ghomashchi R., “Effect of modification during conventional and semi- solid metal processing of A356 Al-Si Alloy”, Science and Engineering, A 415, 273–285 (2006).
• Apelian, D., “Aluminum Cast Alloys: Enabling Tools for Improved Performance”, North American Die Casting Association, 6-17 (2009).
• Kádár C., Máthis K., Knapek M., and Chmelík F., “The Effect of Matrix Composition on the Deformation and Failure Mechanisms in Metal Matrix Syntactic Foams during Compression”, MDPI Materials, 10,196, 1-10 (2017).
• Ozkir, S.E., “Photoelastic Stress Analysis of Fixed Restorations over Straight and Inclined Implants with Different Macro-Designs”, Ankara University Graduate School Of Health Sciences. Ankara. 40-47 (2007).
• Aly M. S., “Behavior of closed cell aluminium foams upon compressive testing at elevated temperatures: Experimental results”, Materials Letters. Vol. 61( 14–15), 3138-3141 (2007).