Influence of layer architecture on fracture toughness and specimen stiffness in polymer multilayer composites
The objective of this contribution was to increase the fracture toughness of talcum reinforced polypropylene (PP) while preserving specimen stiffness. This was accomplished by introducing soft interlayers (ILs) made of standard PP (PP-St) or very compliant PP (PP-Soft) and utilizing the so-called ma...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-07-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522004506 |
| _version_ | 1811333307506360320 |
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| author | Johannes Wiener Florian Arbeiter Otmar Kolednik Gerald Pinter |
| author_facet | Johannes Wiener Florian Arbeiter Otmar Kolednik Gerald Pinter |
| author_sort | Johannes Wiener |
| collection | DOAJ |
| description | The objective of this contribution was to increase the fracture toughness of talcum reinforced polypropylene (PP) while preserving specimen stiffness. This was accomplished by introducing soft interlayers (ILs) made of standard PP (PP-St) or very compliant PP (PP-Soft) and utilizing the so-called material inhomogeneity effect. Architectures with one or two ILs of either 0.3 or 0.9 mm thickness were tested in single edge notched bending experiments. Layers of PP-Soft always arrested growing cracks due to their low Young’s modulus, E, and yield stress, σy, which is called an (E-σy)-inhomogeneity. However, the increase in fracture toughness came at the cost of specimen stiffness. For ILs made of PP-St, E was still lower compared to the matrix material, but σy was similar (pure E-inhomogeneity). Specimen stiffness remained high for these composites, but crack arrest could not be achieved in most cases, which could be explained by plastic deformation of the soft layers. Plastic deformation could be contained within the ILs in one of the architectures, where two large ILs were used. Crack arrest could be achieved in this adapted IL design, leading to excellent fracture toughness in combination with high stiffness. |
| first_indexed | 2024-04-13T16:50:44Z |
| format | Article |
| id | doaj.art-fdd885120504435ab7af71a4c4fa7729 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-13T16:50:44Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-fdd885120504435ab7af71a4c4fa77292022-12-22T02:38:57ZengElsevierMaterials & Design0264-12752022-07-01219110828Influence of layer architecture on fracture toughness and specimen stiffness in polymer multilayer compositesJohannes Wiener0Florian Arbeiter1Otmar Kolednik2Gerald Pinter3Materials Science and Testing of Polymers, Montanuniversitaet Leoben, 8700 Leoben, AustriaMaterials Science and Testing of Polymers, Montanuniversitaet Leoben, 8700 Leoben, Austria; Corresponding author.Erich-Schmid-Institute of Materials Science, Austrian Academy of Science, 8700 Leoben, AustriaMaterials Science and Testing of Polymers, Montanuniversitaet Leoben, 8700 Leoben, AustriaThe objective of this contribution was to increase the fracture toughness of talcum reinforced polypropylene (PP) while preserving specimen stiffness. This was accomplished by introducing soft interlayers (ILs) made of standard PP (PP-St) or very compliant PP (PP-Soft) and utilizing the so-called material inhomogeneity effect. Architectures with one or two ILs of either 0.3 or 0.9 mm thickness were tested in single edge notched bending experiments. Layers of PP-Soft always arrested growing cracks due to their low Young’s modulus, E, and yield stress, σy, which is called an (E-σy)-inhomogeneity. However, the increase in fracture toughness came at the cost of specimen stiffness. For ILs made of PP-St, E was still lower compared to the matrix material, but σy was similar (pure E-inhomogeneity). Specimen stiffness remained high for these composites, but crack arrest could not be achieved in most cases, which could be explained by plastic deformation of the soft layers. Plastic deformation could be contained within the ILs in one of the architectures, where two large ILs were used. Crack arrest could be achieved in this adapted IL design, leading to excellent fracture toughness in combination with high stiffness.http://www.sciencedirect.com/science/article/pii/S0264127522004506PolypropyleneMultilayerFracture mechanicsBiomimetic designMaterial inhomogeneity effect |
| spellingShingle | Johannes Wiener Florian Arbeiter Otmar Kolednik Gerald Pinter Influence of layer architecture on fracture toughness and specimen stiffness in polymer multilayer composites Materials & Design Polypropylene Multilayer Fracture mechanics Biomimetic design Material inhomogeneity effect |
| title | Influence of layer architecture on fracture toughness and specimen stiffness in polymer multilayer composites |
| title_full | Influence of layer architecture on fracture toughness and specimen stiffness in polymer multilayer composites |
| title_fullStr | Influence of layer architecture on fracture toughness and specimen stiffness in polymer multilayer composites |
| title_full_unstemmed | Influence of layer architecture on fracture toughness and specimen stiffness in polymer multilayer composites |
| title_short | Influence of layer architecture on fracture toughness and specimen stiffness in polymer multilayer composites |
| title_sort | influence of layer architecture on fracture toughness and specimen stiffness in polymer multilayer composites |
| topic | Polypropylene Multilayer Fracture mechanics Biomimetic design Material inhomogeneity effect |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522004506 |
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