Particle breakage and morphology changes of calcareous sands under one-dimensional compression loading
文献类型：期刊论文
| 作者 | Wei, Houzhen4; Liu, Hao1,4,5; Zhao, Tao2; Zhang, Shuodong2; Ma, Linjian3; Yin, Mei2; Meng, Qingshan4 |
| 刊名 | MARINE GEOPHYSICAL RESEARCH
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 43期号:4页码:- |
| ISSN号 | 0025-3235 |
| 关键词 | Calcareous sand Acoustic emission One-dimensional compression Particle breakage |
| 英文摘要 | Particle breakage and the corresponding change of morphology are two key factors governing the mechanical behavior of calcareous sands in offshore geotechnical engineering constructions. To reveal the characteristics of these two factors, oedometer tests on calcareous sands have been performed in this study. The materials were sampled from the South China Sea with a homogenous composition but different particle size ranges and relative densities. In these tests, the dynamic imaging analysis (DIA) by Microtrac PartAn(3D) and acoustic emission (AE) techniques were employed to investigate the evolution of particle morphology and characteristics of AE signaling associated with the material deformations, respectively. The compressive deformation of calcareous sands was mainly induced by the particle rearrangement and particle breakage which are effectively irreversible plastic deformations. The irregular particle shape has led to strong interparticle filling and interlocking effects, which affected the particle slippage and rearrangement significantly during the deformation. The intensity and type of AE-triggering micro-mechanical behaviors were characterized by AE ringdown counts (RDC) and peak frequency, respectively. The RDC values concentrated primarily in the compression stage and increased rapidly under the normal stress of 400-3200 kPa. The RDC values increased with the increase of particle size but decreased with the increase of initial relative density. The compressive deformation and breakage characteristics of calcareous sands are consistent with the existing acoustic emission laws. |
| 学科主题 | Geochemistry & Geophysics ; Oceanography |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:000895680200001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35370]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering, Guilin University of Technology, 541004 Guilin, China 2.Department of Civil and Environmental Engineering, College of Engineering, Brunel University London, Uxbridge, UK 3.State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, 210007 Nanjing, China 4.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, 430071 Wuhan, China 5.College of Civil Engineering and Architecture, Guilin University of Technology, 541004 Guilin, China |
| 推荐引用方式 GB/T 7714 | Wei, Houzhen,Liu, Hao,Zhao, Tao,et al. Particle breakage and morphology changes of calcareous sands under one-dimensional compression loading[J]. MARINE GEOPHYSICAL RESEARCH,2022,43(4):-. |
| APA | Wei, Houzhen.,Liu, Hao.,Zhao, Tao.,Zhang, Shuodong.,Ma, Linjian.,...&Meng, Qingshan.(2022).Particle breakage and morphology changes of calcareous sands under one-dimensional compression loading.MARINE GEOPHYSICAL RESEARCH,43(4),-. |
| MLA | Wei, Houzhen,et al."Particle breakage and morphology changes of calcareous sands under one-dimensional compression loading".MARINE GEOPHYSICAL RESEARCH 43.4(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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