Investigation of the Mechanical Behaviors and Damage Mechanism of C/C Composites Impacted by High-Velocity Jets
Carbon/Carbon (C/C) composites exhibit excellent mechanical properties at high temperatures, making them widely used in aerospace, such as the leading edges of spaceplane wings and the nose cones of hypersonic aircraft. However, damage caused by rain erosion to C/C composites affects their mechanica...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-02-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/17/4/963 |
| _version_ | 1797297611156226048 |
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| author | Yifan Yue Bo Wang Kefei Yan Renxi Zhao Chengyu Zhang Yulong Li |
| author_facet | Yifan Yue Bo Wang Kefei Yan Renxi Zhao Chengyu Zhang Yulong Li |
| author_sort | Yifan Yue |
| collection | DOAJ |
| description | Carbon/Carbon (C/C) composites exhibit excellent mechanical properties at high temperatures, making them widely used in aerospace, such as the leading edges of spaceplane wings and the nose cones of hypersonic aircraft. However, damage caused by rain erosion to C/C composites affects their mechanical properties and poses significant challenges during operational service periods. A jet impingement test platform was employed to conduct single and multiple water-jet erosion tests on three-dimensional orthogonal C/C composite materials and to investigate the residual mechanical properties of the specimens after jet impact. The damage was characterized using optical microscopy, scanning electron microscopy, and X-ray computed tomography. The results showed that the damage types of the C/C composite materials under water-jet impingement included fiber bundle fracturing, delamination, and debonding. The extent of erosion damage was positively correlated with the jet velocity and diameter. The changes in the multi-jet damage indicated a cumulative expansion process, and <i>z</i>-directional fiber bundles exhibited superior resistance to jet impact damage propagation. The results of the three-point bending tests showed that the greater the initial impact damage, the lower the residual mechanical properties of the materials, and the residual strength of the specimen suddenly decreased when damage occurred at the back of the specimen. |
| first_indexed | 2024-03-07T22:23:15Z |
| format | Article |
| id | doaj.art-e1fe1f110ef24345ab5697df95a6d98c |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-07T22:23:15Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-e1fe1f110ef24345ab5697df95a6d98c2024-02-23T15:25:58ZengMDPI AGMaterials1996-19442024-02-0117496310.3390/ma17040963Investigation of the Mechanical Behaviors and Damage Mechanism of C/C Composites Impacted by High-Velocity JetsYifan Yue0Bo Wang1Kefei Yan2Renxi Zhao3Chengyu Zhang4Yulong Li5School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, ChinaThe Sixth Academy of China Aerospace Science and Industry Corporation, Huhehaote 010010, ChinaSchool of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, ChinaShaanxi Key Laboratory of Impact Dynamics and Engineering Application, Xi’an 710072, ChinaCarbon/Carbon (C/C) composites exhibit excellent mechanical properties at high temperatures, making them widely used in aerospace, such as the leading edges of spaceplane wings and the nose cones of hypersonic aircraft. However, damage caused by rain erosion to C/C composites affects their mechanical properties and poses significant challenges during operational service periods. A jet impingement test platform was employed to conduct single and multiple water-jet erosion tests on three-dimensional orthogonal C/C composite materials and to investigate the residual mechanical properties of the specimens after jet impact. The damage was characterized using optical microscopy, scanning electron microscopy, and X-ray computed tomography. The results showed that the damage types of the C/C composite materials under water-jet impingement included fiber bundle fracturing, delamination, and debonding. The extent of erosion damage was positively correlated with the jet velocity and diameter. The changes in the multi-jet damage indicated a cumulative expansion process, and <i>z</i>-directional fiber bundles exhibited superior resistance to jet impact damage propagation. The results of the three-point bending tests showed that the greater the initial impact damage, the lower the residual mechanical properties of the materials, and the residual strength of the specimen suddenly decreased when damage occurred at the back of the specimen.https://www.mdpi.com/1996-1944/17/4/963rain erosionC/C compositesdamage mechanismresidual strength |
| spellingShingle | Yifan Yue Bo Wang Kefei Yan Renxi Zhao Chengyu Zhang Yulong Li Investigation of the Mechanical Behaviors and Damage Mechanism of C/C Composites Impacted by High-Velocity Jets Materials rain erosion C/C composites damage mechanism residual strength |
| title | Investigation of the Mechanical Behaviors and Damage Mechanism of C/C Composites Impacted by High-Velocity Jets |
| title_full | Investigation of the Mechanical Behaviors and Damage Mechanism of C/C Composites Impacted by High-Velocity Jets |
| title_fullStr | Investigation of the Mechanical Behaviors and Damage Mechanism of C/C Composites Impacted by High-Velocity Jets |
| title_full_unstemmed | Investigation of the Mechanical Behaviors and Damage Mechanism of C/C Composites Impacted by High-Velocity Jets |
| title_short | Investigation of the Mechanical Behaviors and Damage Mechanism of C/C Composites Impacted by High-Velocity Jets |
| title_sort | investigation of the mechanical behaviors and damage mechanism of c c composites impacted by high velocity jets |
| topic | rain erosion C/C composites damage mechanism residual strength |
| url | https://www.mdpi.com/1996-1944/17/4/963 |
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