Modeling the Nonlinear Deformation of Highly Porous Cellular Plastics Filled with Clay Nanoplatelets
Rigid low-density plastic foams subjected to mechanical loads typically exhibit a nonlinear deformation stage preceding failure. At moderate strains, when the geometrical nonlinearity is negligible, such foam response is predominantly caused by the nonlinearity of deformation of their principal stru...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/3/1033 |
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| author | Aivars Lagzdiņš Alberts Zilaucs Ilze Beverte Jānis Andersons |
| author_facet | Aivars Lagzdiņš Alberts Zilaucs Ilze Beverte Jānis Andersons |
| author_sort | Aivars Lagzdiņš |
| collection | DOAJ |
| description | Rigid low-density plastic foams subjected to mechanical loads typically exhibit a nonlinear deformation stage preceding failure. At moderate strains, when the geometrical nonlinearity is negligible, such foam response is predominantly caused by the nonlinearity of deformation of their principal structural elements—foam struts. Orientational averaging of stresses in foam struts enables estimation of the stresses taken up by foams at a given applied strain. Based on a structural model of highly porous anisotropic cellular plastics filled with clay nanoplatelets and the orientational averaging, a method for calculating their nonlinear deformation is derived in terms of structural parameters of the porous material, the mechanical properties of the monolithic polymer, and filler particles and their spatial orientation. The method is applied to predicting the tensile stress-strain diagrams of organoclay-filled low-density rigid polyurethane foams, and reasonable agreement with experimental data is demonstrated. |
| first_indexed | 2024-03-09T23:35:53Z |
| format | Article |
| id | doaj.art-4408820d10e94227b8659749cf441486 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T23:35:53Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-4408820d10e94227b8659749cf4414862023-11-23T17:01:10ZengMDPI AGMaterials1996-19442022-01-01153103310.3390/ma15031033Modeling the Nonlinear Deformation of Highly Porous Cellular Plastics Filled with Clay NanoplateletsAivars Lagzdiņš0Alberts Zilaucs1Ilze Beverte2Jānis Andersons3Institute for Mechanics of Materials, University of Latvia, 3 Jelgavas St., LV-1004 Riga, LatviaInstitute for Mechanics of Materials, University of Latvia, 3 Jelgavas St., LV-1004 Riga, LatviaInstitute for Mechanics of Materials, University of Latvia, 3 Jelgavas St., LV-1004 Riga, LatviaInstitute for Mechanics of Materials, University of Latvia, 3 Jelgavas St., LV-1004 Riga, LatviaRigid low-density plastic foams subjected to mechanical loads typically exhibit a nonlinear deformation stage preceding failure. At moderate strains, when the geometrical nonlinearity is negligible, such foam response is predominantly caused by the nonlinearity of deformation of their principal structural elements—foam struts. Orientational averaging of stresses in foam struts enables estimation of the stresses taken up by foams at a given applied strain. Based on a structural model of highly porous anisotropic cellular plastics filled with clay nanoplatelets and the orientational averaging, a method for calculating their nonlinear deformation is derived in terms of structural parameters of the porous material, the mechanical properties of the monolithic polymer, and filler particles and their spatial orientation. The method is applied to predicting the tensile stress-strain diagrams of organoclay-filled low-density rigid polyurethane foams, and reasonable agreement with experimental data is demonstrated.https://www.mdpi.com/1996-1944/15/3/1033cellular plasticporositypolyurethane foamsnanoplateletsstructural elementanisotropy |
| spellingShingle | Aivars Lagzdiņš Alberts Zilaucs Ilze Beverte Jānis Andersons Modeling the Nonlinear Deformation of Highly Porous Cellular Plastics Filled with Clay Nanoplatelets Materials cellular plastic porosity polyurethane foams nanoplatelets structural element anisotropy |
| title | Modeling the Nonlinear Deformation of Highly Porous Cellular Plastics Filled with Clay Nanoplatelets |
| title_full | Modeling the Nonlinear Deformation of Highly Porous Cellular Plastics Filled with Clay Nanoplatelets |
| title_fullStr | Modeling the Nonlinear Deformation of Highly Porous Cellular Plastics Filled with Clay Nanoplatelets |
| title_full_unstemmed | Modeling the Nonlinear Deformation of Highly Porous Cellular Plastics Filled with Clay Nanoplatelets |
| title_short | Modeling the Nonlinear Deformation of Highly Porous Cellular Plastics Filled with Clay Nanoplatelets |
| title_sort | modeling the nonlinear deformation of highly porous cellular plastics filled with clay nanoplatelets |
| topic | cellular plastic porosity polyurethane foams nanoplatelets structural element anisotropy |
| url | https://www.mdpi.com/1996-1944/15/3/1033 |
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