Dynamic mechanical behavior of coral rock subjected to high strain rate loading
文献类型：期刊论文
| 作者 | Wei, Houzhen1; Ma, Linjian4; Wu, Jiawen4; Yu, Jin3; Li, Zeng4; Xu, Rui1,2 |
| 刊名 | MARINE GEOPHYSICAL RESEARCH
 |
| 出版日期 | 2022-09-01 |
| 卷号 | 43期号:3页码:- |
| ISSN号 | 0025-3235 |
| 关键词 | Coral rock Strain rate Dynamic increase factor Failure mode Energy absorption |
| 英文摘要 | Coral rock of biological origin exhibits distinctive mechanical behavior compared to that of conventional mineral rocks. Quasi-static and impact loading tests were conducted to investigate the mechanical properties of coral rock using a servo-hydraulic device and a split Hopkinson pressure bar (SHPB) apparatus. The dependence of the dynamic compressive strength, elastic modulus and energy absorption were quantitatively analyzed with respect to loading strain rate. The coral rock is characterized by a high porosity of 50.99 (+/- 5.60)% and a low bulk density of 1.31 (+/- 0.07) g cm(-3) because of biological sedimentary. Both the quasi-static and dynamic stress-strain curves contain more pronounced compaction portion than dense rocks due to its special porous skeleton structure. The dynamic increase factor (DIF) of strength increases from 1.88 to 3.76 with the strain rate increasing from 117 to 334 s(-1), which could be expressed with a parabolic function. The dynamic elastic modulus exhibits an overall linear increasing trend with loading strain rate. The ratio of reflected energy to incident energy is positively related with the strain rate while the absorbed ratio is roughly negatively correlated with strain rate with a value less than 0.08. The specific energy absorption (SEA) is found to be proportional to the logarithm of the loading strain rate. It seems that the failure mode of coral rock under both quasi-static and dynamic compression is more dependent on inherent flaws like pre-existing pores, growth lines, weak bonding areas than loading strain rate. Nevertheless, the dominant failure mode in microscopic scale for coral rock at higher strain rate is still trans-granular fracture by means of SEM. |
| 学科主题 | Geochemistry & Geophysics ; Oceanography |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:000840310700001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35379]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 2.University of Chinese Academy of Sciences, Beijing 10049, China 3.Fujian Engineering Technology Research Center for Tunnel and Underground Space, Huaqiao University, Xiamen 361021, China 4.State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, China |
| 推荐引用方式 GB/T 7714 | Wei, Houzhen,Ma, Linjian,Wu, Jiawen,et al. Dynamic mechanical behavior of coral rock subjected to high strain rate loading[J]. MARINE GEOPHYSICAL RESEARCH,2022,43(3):-. |
| APA | Wei, Houzhen,Ma, Linjian,Wu, Jiawen,Yu, Jin,Li, Zeng,&Xu, Rui.(2022).Dynamic mechanical behavior of coral rock subjected to high strain rate loading.MARINE GEOPHYSICAL RESEARCH,43(3),-. |
| MLA | Wei, Houzhen,et al."Dynamic mechanical behavior of coral rock subjected to high strain rate loading".MARINE GEOPHYSICAL RESEARCH 43.3(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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