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浏览/检索结果: 共68条，第1-10条 帮助

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High cycle and very high cycle fatigue of TC17 titanium alloy: Stress ratio effect and fatigue strength modeling 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF FATIGUE, 2023, 卷号: 166, 页码: 16
作者:  Li, Gen;  Ke, Lei;  Ren, Xuechong;  Sun, Chengqi;  Sun CQ(孙成奇)
  |  收藏  |  浏览/下载：50/0  |  提交时间：2022/11/28
Mechanism of artificial surface defect induced cracking for very high cycle fatigue of Ti alloys 期刊论文  OAI收割
ENGINEERING FRACTURE MECHANICS, 2022, 卷号: 272, 页码: 11
作者:  Sun, Jian;  Peng, Wenjie;  Sun CQ(孙成奇);  Sun CQ(孙成奇)
  |  收藏  |  浏览/下载：36/0  |  提交时间：2022/09/27
Progressive Transition from Extension Fracture to Shear Fracture of Altered Granite During Uniaxial Tensile Tests 期刊论文  OAI收割
ROCK MECHANICS AND ROCK ENGINEERING, 2022, 页码: 21
作者:  Liu, Shijie;  Lan, Hengxing;  Martin, C. Derek
  |  收藏  |  浏览/下载：32/0  |  提交时间：2022/09/21
Progressive Transition from Extension Fracture to Shear Fracture of Altered Granite During Uniaxial Tensile Tests 期刊论文  OAI收割
ROCK MECHANICS AND ROCK ENGINEERING, 2022, 页码: 21
作者:  Liu, Shijie;  Lan, Hengxing;  Martin, C. Derek
  |  收藏  |  浏览/下载：22/0  |  提交时间：2022/09/21
Field observation of debris-flow activities in the initiation area of the Jiangjia Gully, Yunnan Province, China 期刊论文  OAI收割
JOURNAL OF MOUNTAIN SCIENCE, 2022, 卷号: 19, 期号: 6, 页码: 1602-1617
作者:  YANG Hong-juan;  ZHANG Shao-jie;  HU Kai-heng;  WEI Fang-qiang;  WANG Kai
  |  收藏  |  浏览/下载：39/0  |  提交时间：2022/08/22
Field observation of debris-flow activities in the initiation area of the Jiangjia Gully, Yunnan Province, China 期刊论文  OAI收割
JOURNAL OF MOUNTAIN SCIENCE, 2022, 卷号: 19, 期号: 6, 页码: 1602-1617
作者:  YANG Hong-juan;  ZHANG Shao-jie;  HU Kai-heng;  WEI Fang-qiang;  WANG Kai
  |  收藏  |  浏览/下载：32/0  |  提交时间：2022/09/30
Size and Shape Effects on Fatigue Behavior of G20Mn5QT Steel from Axle Box Bodies in High-Speed Trains 期刊论文  OAI收割
METALS, 2022, 卷号: 12, 期号: 4, 页码: 12
作者:  Zhang, Zhenxian;  Li, Zhongwen;  Wu, Han;  Sun, Chengqi;  Sun CQ(孙成奇)
  |  收藏  |  浏览/下载：33/0  |  提交时间：2022/06/10
Characteristic and mechanism of crack initiation and early growth of an additively manufactured Ti-6Al-4V in very high cycle fatigue regime 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, 2021, 卷号: 205, 页码: 8
作者:  Sun CQ(孙成奇);  Chi, Weiqian;  Wang, Wenjing;  Duan, Yan
  |  收藏  |  浏览/下载：107/0  |  提交时间：2021/09/07
Crack initiation mechanisms under two stress ratios up to very-high-cycle fatigue regime for a selective laser melted Ti-6Al-4V 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF FATIGUE, 2021, 卷号: 149, 页码: 10
作者:  Du LM(杜雷鸣);  Pan XN(潘向南);  Qian GA(钱桂安);  Zheng L(郑亮);  Hong YS(洪友士)
  |  收藏  |  浏览/下载：59/0  |  提交时间：2021/08/03
On the Terrestrial Gamma Ray Flashes Preceding Narrow Bipolar Events 期刊论文  OAI收割
Geophysical Research Letters, 2021, 卷号: 48, 页码: e92160
作者:  HXMT
  |  收藏  |  浏览/下载：24/0  |  提交时间：2022/02/08
low frequency magnetic sferics  narrow bipolar events (NBEs)  relativistic feedback mechanism  Terrestrial Gamma ray Flashes (TGFs)  Abstract: Narrow bipolar events (NBEs) are occasionally reported to occur within a few ms after Terrestrial Gamma ray Flashes (TGFs), while the formation mechanism remains mysterious partially due to the lack of sufficient observations. Here, nine more TGFs of this scenario are reported with concurrent LF sferics and lightning location data. The gamma ray production in these TGFs preceded the occurrence of NBEs by a minimum of 60 µs up to 13.5 ms, and no other fast leader discharge was found within 20 ms before the TGF. The TGF preceded positive NBEs occurred at altitudes of 8.6-11 km in thunderstorms, likely in the high electric field (E field) region of lightning initiation. The analyses show that the NBE preceding TGFs bear harder energy spectrum with larger proportion of high energy photons than EIP related TGFs produced in association with lightning leader. Our findings support the relativistic feedback mechanism of gamma ray generation in the large scale thunderstorm E field.