Unraveling Non‐Uniform Strain‐Induced Crystallization Near a Crack Tip in Natural Rubber
Abstract Strain‐induced crystallization (SIC) in natural rubber (NR) near crack tips significantly enhances crack growth resistance, but understanding the interplay between local strain field and crystallization remains challenging due to confined and heterogeneous characteristics. Using micro‐scale...
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| Format: | Article |
| Language: | English |
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Wiley
2024-03-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202307741 |
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| author | Thanh‐Tam Mai Tomohiro Yasui Ruito Tanaka Hiroyasu Masunaga Taizo Kabe Katsuhiko Tsunoda Shinichi Sakurai Kenji Urayama |
| author_facet | Thanh‐Tam Mai Tomohiro Yasui Ruito Tanaka Hiroyasu Masunaga Taizo Kabe Katsuhiko Tsunoda Shinichi Sakurai Kenji Urayama |
| author_sort | Thanh‐Tam Mai |
| collection | DOAJ |
| description | Abstract Strain‐induced crystallization (SIC) in natural rubber (NR) near crack tips significantly enhances crack growth resistance, but understanding the interplay between local strain field and crystallization remains challenging due to confined and heterogeneous characteristics. Using micro‐scale digital image correlation (DIC) and scanning wide‐angle X‐ray diffraction (WAXD, with a narrow 10 µm square beam), this study maps local strain tensor properties and SIC in the vicinity of the crack tip and its peripheral zone (≈3 mm × 1 mm area). The analysis reveals a significant correlation between these properties. In the peripheral zone, there is a noticeable deviation of both the principal strain axis and the crystal orientation from the crack opening direction. These deviations are linearly correlated, which indicates that shear strain plays a significant role in determining the crystal orientation. Crucially, the maximum tensile component in the tensor of local principal strains predominantly dictates local crystallinity. This simplicity is attributed to the limited variation in types of deformation within the SIC region, with corresponding to deformations falling between planar and uniaxial stretching. These findings pave the way for predicting crystallinity distribution using solely strain field data, offering valuable insights into the role of SIC in enhancing the crack growth resistance of NR. |
| first_indexed | 2024-04-24T18:42:33Z |
| format | Article |
| id | doaj.art-df10a380cf1b41c38fa5ee6c0466b2c0 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-04-24T18:42:33Z |
| publishDate | 2024-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-df10a380cf1b41c38fa5ee6c0466b2c02024-03-27T09:39:53ZengWileyAdvanced Science2198-38442024-03-011112n/an/a10.1002/advs.202307741Unraveling Non‐Uniform Strain‐Induced Crystallization Near a Crack Tip in Natural RubberThanh‐Tam Mai0Tomohiro Yasui1Ruito Tanaka2Hiroyasu Masunaga3Taizo Kabe4Katsuhiko Tsunoda5Shinichi Sakurai6Kenji Urayama7Department of Material Chemistry Graduate School of Engineering Kyoto University Nishikyo‐ku Kyoto 615‐8510 JapanDepartment of Biobased Materials Science Kyoto Institute of Technology Kyoto 606‐8585 JapanDepartment of Biobased Materials Science Kyoto Institute of Technology Kyoto 606‐8585 JapanJapan Synchrotron Radiation Research Institute Sayo‐gun Hyogo 679‐5198 JapanJapan Synchrotron Radiation Research Institute Sayo‐gun Hyogo 679‐5198 JapanSustainable and Advanced Materials Division Bridgestone Corporation Tokyo 187‐8531 JapanDepartment of Biobased Materials Science Kyoto Institute of Technology Kyoto 606‐8585 JapanDepartment of Material Chemistry Graduate School of Engineering Kyoto University Nishikyo‐ku Kyoto 615‐8510 JapanAbstract Strain‐induced crystallization (SIC) in natural rubber (NR) near crack tips significantly enhances crack growth resistance, but understanding the interplay between local strain field and crystallization remains challenging due to confined and heterogeneous characteristics. Using micro‐scale digital image correlation (DIC) and scanning wide‐angle X‐ray diffraction (WAXD, with a narrow 10 µm square beam), this study maps local strain tensor properties and SIC in the vicinity of the crack tip and its peripheral zone (≈3 mm × 1 mm area). The analysis reveals a significant correlation between these properties. In the peripheral zone, there is a noticeable deviation of both the principal strain axis and the crystal orientation from the crack opening direction. These deviations are linearly correlated, which indicates that shear strain plays a significant role in determining the crystal orientation. Crucially, the maximum tensile component in the tensor of local principal strains predominantly dictates local crystallinity. This simplicity is attributed to the limited variation in types of deformation within the SIC region, with corresponding to deformations falling between planar and uniaxial stretching. These findings pave the way for predicting crystallinity distribution using solely strain field data, offering valuable insights into the role of SIC in enhancing the crack growth resistance of NR.https://doi.org/10.1002/advs.202307741crystallizationelastomernatural rubberrubber elasticitysynchrotron radiation |
| spellingShingle | Thanh‐Tam Mai Tomohiro Yasui Ruito Tanaka Hiroyasu Masunaga Taizo Kabe Katsuhiko Tsunoda Shinichi Sakurai Kenji Urayama Unraveling Non‐Uniform Strain‐Induced Crystallization Near a Crack Tip in Natural Rubber Advanced Science crystallization elastomer natural rubber rubber elasticity synchrotron radiation |
| title | Unraveling Non‐Uniform Strain‐Induced Crystallization Near a Crack Tip in Natural Rubber |
| title_full | Unraveling Non‐Uniform Strain‐Induced Crystallization Near a Crack Tip in Natural Rubber |
| title_fullStr | Unraveling Non‐Uniform Strain‐Induced Crystallization Near a Crack Tip in Natural Rubber |
| title_full_unstemmed | Unraveling Non‐Uniform Strain‐Induced Crystallization Near a Crack Tip in Natural Rubber |
| title_short | Unraveling Non‐Uniform Strain‐Induced Crystallization Near a Crack Tip in Natural Rubber |
| title_sort | unraveling non uniform strain induced crystallization near a crack tip in natural rubber |
| topic | crystallization elastomer natural rubber rubber elasticity synchrotron radiation |
| url | https://doi.org/10.1002/advs.202307741 |
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