Numerical Modeling and Experimental Behavior of Closed-Cell Aluminum Foam Fabricated by the Gas Blowing Method under Compressive Loading
This paper deals with the experimental and numerical study of closed-cell aluminum-based foam under compressive loading. Experimental samples were produced by the gas blowing method. Foam samples had an average cell size of around 1 mm, with sizes in the range 0.5–5 mm, and foam density of...
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MDPI AG
2019-05-01
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| author | Varun Sharma Fatima Zivic Nenad Grujovic Norbert Babcsan Judith Babcsan |
| author_facet | Varun Sharma Fatima Zivic Nenad Grujovic Norbert Babcsan Judith Babcsan |
| author_sort | Varun Sharma |
| collection | DOAJ |
| description | This paper deals with the experimental and numerical study of closed-cell aluminum-based foam under compressive loading. Experimental samples were produced by the gas blowing method. Foam samples had an average cell size of around 1 mm, with sizes in the range 0.5–5 mm, and foam density of 0.6 g/cm<sup>3</sup>. Foam samples were subjected to a uniaxial compression test, at a displacement rate of 0.001 mm/s. Load and stress were monitored as the functions of extension and strain, respectively. For numerical modeling, CT scan images of experimental samples were used to create a volume model. Solid 3D quadratic tetrahedron mesh with TETRA 10-node elements was applied, with isotropic material behavior. A nonlinear static test with an elasto-plastic model was used in the numerical simulation, with von Mises criteria, and strain was kept below 10% by the software. Uniform compressive loading was set up over the top sample surface, in the y-axis direction only. Experimental tests showed that a 90 kN load produced complete failure of the sample, and three zones were exhibited: an elastic region, a rather uniform plateau region (around 23 MPa) and a densification region that started around 35 MPa. Yielding, or collapse stress, was achieved around 20 MPa. The densification region and a rapid rise in stress began at around 52% of sample deformation. The numerical model showed both compressive and tensile stresses within the complex stress field, indicating that shear also had a prominent role. Mainly compressive stresses were exhibited in the zones of the larger cells, whereas tensile stresses occurred in zones with an increased number of small cells and thin cell walls. |
| first_indexed | 2024-04-12T01:10:35Z |
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| id | doaj.art-fa65bc856b5e49d092aac7cf6e2c325c |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-12T01:10:35Z |
| publishDate | 2019-05-01 |
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| spelling | doaj.art-fa65bc856b5e49d092aac7cf6e2c325c2022-12-22T03:54:08ZengMDPI AGMaterials1996-19442019-05-011210158210.3390/ma12101582ma12101582Numerical Modeling and Experimental Behavior of Closed-Cell Aluminum Foam Fabricated by the Gas Blowing Method under Compressive LoadingVarun Sharma0Fatima Zivic1Nenad Grujovic2Norbert Babcsan3Judith Babcsan4Faculty of Engineering, University of Kragujevac, Kragujevac 34000, SerbiaFaculty of Engineering, University of Kragujevac, Kragujevac 34000, SerbiaFaculty of Engineering, University of Kragujevac, Kragujevac 34000, SerbiaALUINVENT, Felsőzsolcai Industrial Park, Miskolc H-3561, HungaryInnobay Hungary Ltd., Miskolc 3519, HungaryThis paper deals with the experimental and numerical study of closed-cell aluminum-based foam under compressive loading. Experimental samples were produced by the gas blowing method. Foam samples had an average cell size of around 1 mm, with sizes in the range 0.5–5 mm, and foam density of 0.6 g/cm<sup>3</sup>. Foam samples were subjected to a uniaxial compression test, at a displacement rate of 0.001 mm/s. Load and stress were monitored as the functions of extension and strain, respectively. For numerical modeling, CT scan images of experimental samples were used to create a volume model. Solid 3D quadratic tetrahedron mesh with TETRA 10-node elements was applied, with isotropic material behavior. A nonlinear static test with an elasto-plastic model was used in the numerical simulation, with von Mises criteria, and strain was kept below 10% by the software. Uniform compressive loading was set up over the top sample surface, in the y-axis direction only. Experimental tests showed that a 90 kN load produced complete failure of the sample, and three zones were exhibited: an elastic region, a rather uniform plateau region (around 23 MPa) and a densification region that started around 35 MPa. Yielding, or collapse stress, was achieved around 20 MPa. The densification region and a rapid rise in stress began at around 52% of sample deformation. The numerical model showed both compressive and tensile stresses within the complex stress field, indicating that shear also had a prominent role. Mainly compressive stresses were exhibited in the zones of the larger cells, whereas tensile stresses occurred in zones with an increased number of small cells and thin cell walls.https://www.mdpi.com/1996-1944/12/10/1582aluminum foamclosed-cell foammicro-CTtomographymodelingmechanical properties |
| spellingShingle | Varun Sharma Fatima Zivic Nenad Grujovic Norbert Babcsan Judith Babcsan Numerical Modeling and Experimental Behavior of Closed-Cell Aluminum Foam Fabricated by the Gas Blowing Method under Compressive Loading Materials aluminum foam closed-cell foam micro-CT tomography modeling mechanical properties |
| title | Numerical Modeling and Experimental Behavior of Closed-Cell Aluminum Foam Fabricated by the Gas Blowing Method under Compressive Loading |
| title_full | Numerical Modeling and Experimental Behavior of Closed-Cell Aluminum Foam Fabricated by the Gas Blowing Method under Compressive Loading |
| title_fullStr | Numerical Modeling and Experimental Behavior of Closed-Cell Aluminum Foam Fabricated by the Gas Blowing Method under Compressive Loading |
| title_full_unstemmed | Numerical Modeling and Experimental Behavior of Closed-Cell Aluminum Foam Fabricated by the Gas Blowing Method under Compressive Loading |
| title_short | Numerical Modeling and Experimental Behavior of Closed-Cell Aluminum Foam Fabricated by the Gas Blowing Method under Compressive Loading |
| title_sort | numerical modeling and experimental behavior of closed cell aluminum foam fabricated by the gas blowing method under compressive loading |
| topic | aluminum foam closed-cell foam micro-CT tomography modeling mechanical properties |
| url | https://www.mdpi.com/1996-1944/12/10/1582 |
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