中国科学院机构知识库网格系统: 检索

A strain-based J-integral formulation for an internal circumferential surface crack of pipeline under inner pressure and large axial deformation 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING, 2024, 卷号: 212, 页码: 18
作者: Zhao, Di; Gao, Weitao; Zhao, Kai; Zheng, Hang; Chen, Jian

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收藏 | 浏览/下载：5/0 | 提交时间：2024/10/21

J-integral Crack front driving force Strain-based formula Dimensional analysis

Effects of Chemical Short-Range Order and Lattice Distortion on Crack-Tip Behavior of Medium-Entropy Alloy by Atomistic Simulations 期刊论文 OAI收割
METALS, 2024, 卷号: 14, 期号: 2, 页码: 14
作者: Zhu, Xiuju; Cao, Fuhua; Dai, Lanhong; Chen, Yan; Dai LH(戴兰宏)

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收藏 | 浏览/下载：30/0 | 提交时间：2024/04/02

chemical short-range order lattice distortion J-integral localized deformation zone crack molecular dynamics

The anisotropy of fracture toughness of an α-Fβ titanium alloy by β forging 期刊论文 OAI收割
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, 2023, 卷号: 27, 页码: 5840-5853
作者: Yang, Jie; Huang, Sensen

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收藏 | 浏览/下载：2/0 | 提交时间：2024/01/07

Titanium alloy Mechanical anisotropy beta forging Texture J-integral

Remarkably high fracture toughness of HfNbTaTiZr refractory high-entropy alloy 期刊论文 OAI收割
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2022, 卷号: 123, 页码: 70-77
作者: Fan, X. J.; Qu, R. T.; Zhang, Z. F.

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收藏 | 浏览/下载：46/0 | 提交时间：2022/07/01

High-entropy alloys BCC structure Fracture toughness J-integral

Stress intensity factor evolution considering fracture process zone development of granite under monotonic and stepwise cyclic loading 期刊论文 OAI收割
ENGINEERING FRACTURE MECHANICS, 2022, 卷号: 273, 期号: -, 页码: -
作者: Miao, Shuting; Pan, Peng-Zhi; Hou, Wenbo; He, Benguo; Yu, Peiyang

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收藏 | 浏览/下载：19/0 | 提交时间：2023/08/02

Cyclic loading Stress intensity factor Fracture process zone J-integral Digital image correlation Acoustic emission

Determination of mode I fracture toughness of rocks with field fitting and J-integral methods 期刊论文 OAI收割
THEORETICAL AND APPLIED FRACTURE MECHANICS, 2022, 卷号: 118, 期号: -, 页码: -
作者: Miao, Shuting; Pan, Peng-Zhi; Hou, Wenbo; Li, Mei; Wu, Zhenhua

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收藏 | 浏览/下载：21/0 | 提交时间：2023/08/02

Fracture toughness FPZ J-integral Field fitting method DIC

Size effect of deformation nanotwin bundles on their strengthening and toughening in heterogeneous nanostructured Cu 期刊论文 OAI收割
SCIENCE CHINA-TECHNOLOGICAL SCIENCES, 2020, 页码: 9
作者: You Zesheng; Luo Shusen; Lu Lei

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收藏 | 浏览/下载：45/0 | 提交时间：2021/02/02

fracture toughness nanotwins J-integral size effect toughening mechanism

Size effect of deformation nanotwin bundles on their strengthening and toughening in heterogeneous nanostructured Cu 期刊论文 OAI收割
SCIENCE CHINA-TECHNOLOGICAL SCIENCES, 2020, 页码: 9
作者: You Zesheng; Luo Shusen; Lu Lei

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收藏 | 浏览/下载：45/0 | 提交时间：2021/02/02

fracture toughness nanotwins J-integral size effect toughening mechanism

An underlying clock in the extreme flip-flop state transitions of the black hole transient Swift J1658.2-4242 期刊论文 OAI收割
Astronomy and Astrophysics, 2020, 卷号: 641, 页码: A101
作者: HXMT

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收藏 | 浏览/下载：61/0 | 提交时间：2022/02/08

accretion accretion disks black hole physics X-rays: binaries time Astrophysics - High Energy Astrophysical Phenomena Abstract:
Aims: Flip-flops are top-hat-like X-ray flux variations, which have been observed in some transient accreting black hole binary systems, and feature simultaneous changes in the spectral hardness and the power density spectrum (PDS). They occur at a crucial time in the evolution of these systems, when the accretion disc emission starts to dominate over coronal emission. Flip-flops remain a poorly understood phenomenon, so we aim to thoroughly investigate them in a system featuring several such transitions.
Methods: Within the multitude of observations of Swift J1658.2-4242 during its outburst in early 2018, we detected 15 flip-flops, enabling a detailed analysis of their individual properties and the differences between them. We present observations by XMM-Newton, NuSTAR, Astrosat, Swift, Insight-HXMT, INTEGRAL, and ATCA. We analysed their light curves, searched for periodicities, computed their PDSs, and fitted their X-ray spectra, to investigate the source behaviour during flip-flop transitions and how the interval featuring flip-flops differs from the rest of the outburst.
Results: The flip-flops of Swift J1658.2-4242 are of an extreme variety, exhibiting flux differences of up to 77% within 100 s, which is much larger than what has been seen previously. We observed radical changes in the PDS simultaneous with the sharp flux variations, featuring transitions between the quasi-periodic oscillation types C and A, which have never been observed before. Changes in the PDS are delayed, but more rapid than changes in the light curve. Flip-flops occur in two intervals within the outburst, separated by about two weeks in which these phenomena were not seen. Transitions between the two flip-flop states occurred at random integer multiples of a fundamental period of 2.761 ks in the first interval and 2.61 ks in the second. Spectral analysis reveals the high and low flux flip-flop states to be very similar, but distinct from intervals lacking flip-flops. A change of the inner temperature of the accretion disc is responsible for most of the flux difference in the flip-flops. We also highlight the importance of correcting for the influence of the dust scattering halo on the X-ray spectra.

The influence of combined gradient structure with residual stress on crack-growth behavior in medium carbon steel 期刊论文 OAI收割
ENGINEERING FRACTURE MECHANICS, 2019, 卷号: 209, 页码: 369-381
作者: Wang Y(王瑶); Yuan LC; Zhang SJ(张诗嘉); Sun CQ(孙成奇); Wang WJ

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收藏 | 浏览/下载：76/0 | 提交时间：2019/04/11

Gradient material Residual stress Fatigue crack Cyclic J-integral Crack- growth rate