The Effect of Compression on the Void Coalescence under Strong Dynamic Loading
The void coalescence under strong dynamic loading is a significant spallation process for ductile metals. Since the spallation is basically dominated by tension waves, most void coalescence studies have focused on the tension effect. However, it is known that in spallation, the material initially un...
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2022/9990161 |
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| author | Ruichen Tu Ning Wei Yongmao Pei Yan Liu Fengguo Zhang Dongsheng Zhang |
| author_facet | Ruichen Tu Ning Wei Yongmao Pei Yan Liu Fengguo Zhang Dongsheng Zhang |
| author_sort | Ruichen Tu |
| collection | DOAJ |
| description | The void coalescence under strong dynamic loading is a significant spallation process for ductile metals. Since the spallation is basically dominated by tension waves, most void coalescence studies have focused on the tension effect. However, it is known that in spallation, the material initially undergoes a strong compression wave, and then an irreversible deformation is produced by the compression wave inside the material. Therefore, in this paper, the effect of compression on the void coalescence is investigated using the molecular dynamics (MD) simulation. It was found that as the compressive strain increases, the yield strength decreases first and then increases. The results showed that due to the Bauschinger effect (BE), the yield strength decreases by 19.43% from 5.66 GPa without compressive loading to 4.56 GPa when the compressive strain is −7.5%, after which the yield strength increases. The voids do not coalesce when the compressive strain is −8%. In addition, it was found that during the compressive phase, the void surfaces would generate dislocations, which could obstruct the void coalescence in the tensile phase. Furthermore, under compressive loading, the temperature effect on the void coalescence was studied, and it was found that lower temperatures could suppress the void coalescence. |
| format | Article |
| id | doaj-art-9811514c0485415ba154fcb41a85648b |
| institution | Kabale University |
| issn | 1687-8442 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-9811514c0485415ba154fcb41a85648b2025-02-03T01:29:53ZengWileyAdvances in Materials Science and Engineering1687-84422022-01-01202210.1155/2022/9990161The Effect of Compression on the Void Coalescence under Strong Dynamic LoadingRuichen Tu0Ning Wei1Yongmao Pei2Yan Liu3Fengguo Zhang4Dongsheng Zhang5School of Mechanical EngineeringSchool of Mechanical EngineeringCollege of EngineeringSchool of Aerospace EngineeringInstitute of Applied Physics and Computational MathematicsSchool of Mechanical EngineeringThe void coalescence under strong dynamic loading is a significant spallation process for ductile metals. Since the spallation is basically dominated by tension waves, most void coalescence studies have focused on the tension effect. However, it is known that in spallation, the material initially undergoes a strong compression wave, and then an irreversible deformation is produced by the compression wave inside the material. Therefore, in this paper, the effect of compression on the void coalescence is investigated using the molecular dynamics (MD) simulation. It was found that as the compressive strain increases, the yield strength decreases first and then increases. The results showed that due to the Bauschinger effect (BE), the yield strength decreases by 19.43% from 5.66 GPa without compressive loading to 4.56 GPa when the compressive strain is −7.5%, after which the yield strength increases. The voids do not coalesce when the compressive strain is −8%. In addition, it was found that during the compressive phase, the void surfaces would generate dislocations, which could obstruct the void coalescence in the tensile phase. Furthermore, under compressive loading, the temperature effect on the void coalescence was studied, and it was found that lower temperatures could suppress the void coalescence.http://dx.doi.org/10.1155/2022/9990161 |
| spellingShingle | Ruichen Tu Ning Wei Yongmao Pei Yan Liu Fengguo Zhang Dongsheng Zhang The Effect of Compression on the Void Coalescence under Strong Dynamic Loading Advances in Materials Science and Engineering |
| title | The Effect of Compression on the Void Coalescence under Strong Dynamic Loading |
| title_full | The Effect of Compression on the Void Coalescence under Strong Dynamic Loading |
| title_fullStr | The Effect of Compression on the Void Coalescence under Strong Dynamic Loading |
| title_full_unstemmed | The Effect of Compression on the Void Coalescence under Strong Dynamic Loading |
| title_short | The Effect of Compression on the Void Coalescence under Strong Dynamic Loading |
| title_sort | effect of compression on the void coalescence under strong dynamic loading |
| url | http://dx.doi.org/10.1155/2022/9990161 |
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