Article
Geosciences, Multidisciplinary
Yijun Zhang, Xiongwei Tang, Dechuan Liu, Tuncay Taymaz, Tuna Eken, Rumeng Guo, Yong Zheng, Jingqi Wang, Heping Sun
Summary: This study investigates the influence of fault geometry on the kinematics and slip distribution of the Kahramanmaras earthquake doublet in southeastern Turkey using synthetic aperture radar observations and high-frequency teleseismic array waveforms. The results suggest that geometric barriers can affect the propagation speed of rupture and enhance high-frequency wave radiations.
Article
Geochemistry & Geophysics
Melodie E. French, Wenlu Zhu, Xiaohui Xiao, Brian Evans, David J. Prior
Summary: This study reports the strength and deformation behavior of Solnhofen limestone during its transition from brittle to ductile. The results show that the combined effects of water and temperature have complex influences on the deformation and strength of the limestone. At elevated temperatures, water-saturated limestone exhibits weakening in both the brittle and ductile fields. Moreover, the concurrent effects of pore water and temperature significantly reduce the pressure of the brittle to ductile transition. These findings are important for understanding the behavior of limestone in geological processes.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geology
Sun LiJing, Zhao ZhongBao, Pan JiaWei, Liang FengHua, Zhang Lei, Zhang JinJiang
Summary: The study focused on the crustal strength profile of the Kangding section of the Xianshuihe fault zone and identified three quartz deformation mechanisms during progressive deformation. It was found that the strength of the rock is weakened within the fault zone, which may lead to an increase in earthquake frequency.
ACTA PETROLOGICA SINICA
(2021)
Article
Physics, Fluids & Plasmas
J. S. Langer
Summary: This paper attempts to construct a first-principles theory of the fracture toughness of crystalline solids based on the thermodynamic dislocation theory. The analysis results show that the theory's predictions quantitatively agree with experimental data, including both brittle and ductile fracture under various conditions.
Article
Engineering, Multidisciplinary
Richard M. Christensen
Summary: The transition from ductile to brittle behavior is determined to occur at specific values of certain material properties, with a strong relationship found with the elements of the Periodic Table, particularly iron. These findings extend beyond elemental materials and have significant implications for understanding the elastic and failure properties of materials. These developments build upon previous empirical observations from Pugh [7] and provide a broader insight into material behavior.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2021)
Article
Environmental Sciences
Wenshu Peng, Xuri Huang, Zegen Wang
Summary: On September 5, 2022, a Ms6.8 magnitude earthquake occurred in Luding County, Sichuan Province, China. This study used Sentinel-1 SAR images and the D-InSAR approach to analyze the earthquake's displacement field, coseismic sliding distribution, and static coulomb stress changes. The results showed that the Luding earthquake was dominated by the left-lateral strike-slip Moxi fault, with a maximum sliding amount of 174.8 cm at a depth of 8.5 km. The seismic moment tensor obtained was 1.06 x 10(19) Nm, Mw = 6.65. The Coulomb stress generated by the Luding earthquake on the Anninghe fault zone indicated a higher risk of future earthquakes, requiring continuous monitoring and risk assessment.
Article
Materials Science, Multidisciplinary
Yan Lu, Wei-Zhong Han
Summary: Pre-deformation is a useful technique to adjust the ductile-to-brittle transition temperature of body-centered cubic metals. However, the mechanism behind the reduction in DBT temperature is still not well understood due to the complex microstructural changes during pre-straining.
Article
Geosciences, Multidisciplinary
Dong Yuan, Lanbin Zhang, Xiaoling Liu, Tao Feng, Guangze Zhang, Zhengxuan Xu, Zhewei Wang, Xiaojuan Yi, Zhiheng Lin, Yang Ren, Ru Zhang, Li Ren
Summary: This study investigates the impact of the Xianshuihe fault zone on a tunnel under construction in southwestern China. The results show that the fault predominantly affects the maximum and minimum horizontal principal stresses in shallow strata, and the closer the location is to the fault, the greater the impact. Furthermore, tunnel rockbursts tend to occur in sections with high stress, typically located between two faults.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Anirudh Udupa, Tatsuya Sugihara, Koushik Viswanathan, Ronald M. Latanision, Srinivasan Chandrasekar
Summary: This study reveals a unique surface stress-induced embrittlement effect in aluminum mediated by an adsorbed organic monolayer. Atomistic simulations and experimental results demonstrate the influence of carbon-chain length on surface stress, leading to a ductile-to-brittle transition and a significant reduction in deformation forces. The microscopic mechanism involves the suppression of dislocation emission at incipient crack tips.
Review
Engineering, Manufacturing
Tao Zhang, Feng Jiang, Hui Huang, Jing Lu, Yueqin Wu, Zhengyi Jiang, Xipeng Xu
Summary: This paper reviews the brittle-ductile transition (BDT) in extreme manufacturing, analyzes the factors affecting it, and discusses the mechanisms behind it. It suggests that the competition between plastic deformation and crack propagation determines the transition between brittleness and ductility. The brittleness or ductility of the machined material should be regulated by deformation scale, deformation temperature, and machining speed to benefit specific manufacturing processes.
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Shunke Zhang, Ning Tian, Jianghua Li, Guanghua Yang, Wenkun Yang, Guangyan Wang, Zhanqi Liu, Yongxiang Li
Summary: The high temperature performance and microstructure of a forged TiAl-Nb alloy were investigated. The alloy exhibited a brittle-ductile transition temperature between 800°C and 820°C. It had high strength in the brittle stage and the main deformation mechanisms were dislocation movement and dynamic recovery. In the ductile stage, the alloy showed good deformation ability with continuous dynamic recrystallization as the main deformation mechanism, resulting in the destruction of the lamellar structure.
MATERIALS CHARACTERIZATION
(2023)
Article
Geochemistry & Geophysics
Jun Ma, Mingming Wang, Guanghao Ha, Jinghao Lei, Bengang Zhou
Summary: The Yalahe Fault (YLHF) plays a significant role in the structural deformation and seismic hazards of the Kangding segment. By studying tectonic geomorphology, trench excavations, and radiocarbon dating, we have identified six recent paleoearthquake events along the YLHF and determined their recurrence patterns and characteristics. The YLHF follows a quasiperiodic recurrence model and exhibits kinematic characteristics of transtension. It also contributes to the slip rate of the Xianshuihe Fault Zone (XSHF).
Article
Chemistry, Physical
Yinhui Wang, Zhiqiang Liang, Wenxiang Zhao, Xibin Wang, Hao Wang
Summary: This work investigates the anisotropic cutting mechanisms on the surface quality of sapphire in ultra-precision machining. The results show that the ductile-to-brittle transition (DBT) depth is influenced by the machining direction. The evaluation of DBT depths, subsurface damage, and cutting forces is essential for optimizing the precision machining of sapphire.
APPLIED SURFACE SCIENCE
(2023)
Article
Geochemistry & Geophysics
Paul K. Byrne, Bradford J. Foley, Marie E. S. Violay, Michael J. Heap, Sami Mikhail
Summary: The thickness of the brittle lithosphere on a planetary body is influenced by the planet's surface temperature, with smaller, older planets generally having thicker lithospheres and larger, younger planets having thinner lithospheres. Some combinations of planetary and stellar parameters can result in worlds with exceedingly thin brittle layers, which may have little elevated topography and limited volatile cycling and weathering. These predictions can be tested through future telescopic observations of known extrasolar planets.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2021)
Article
Geosciences, Multidisciplinary
Takuma Katori, Norio Shigematsu, Jun Kameda, Ayumu Miyakawa, Risa Matsumura
Summary: The study investigates the features and distribution of fault rocks along the Median Tectonic Line (MTL) in SW Japan, revealing deformation characteristics and temperature conditions across the brittle-plastic transition. It suggests that structures formed by sinistral faulting are older than those formed by dextral faulting, and that the stress differential may remain relatively constant in the deep crust.
JOURNAL OF STRUCTURAL GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Aaron Bufe, David P. S. Bekaert, Ekbal Hussain, Bodo Bookhagen, Douglas W. Burbank, Jessica A. Thompson Jobe, Jie Chen, Tao Li, Langtao Liu, Weijun Gan
GEOPHYSICAL RESEARCH LETTERS
(2017)
Article
Geosciences, Multidisciplinary
Yanchuan Li, Xinjian Shan, Chunyan Qu, Yingfeng Zhang, Xiaogang Song, Yu Jiang, Guohong Zhang, Jean-Mathieu Nocquet, Wenyu Gong, Weijun Gan, Chisheng Wang
JOURNAL OF ASIAN EARTH SCIENCES
(2017)
Article
Geochemistry & Geophysics
Xuzhang Shen, YoungHee Kim, Weijun Gan
Article
Geochemistry & Geophysics
Guoquan Wang, Yan Bao, Weijun Gan, Jianghui Geng, Gengru Xiao, Jack S. Shen
JOURNAL OF GEODYNAMICS
(2018)
Article
Engineering, Civil
Yan Bao, Wen Guo, Guoquan Wang, Weijun Gan, Mingju Zhang, Jack S. Shen
JOURNAL OF SURVEYING ENGINEERING
(2018)
Article
Engineering, Civil
Yan Bao, Wen Guo, Guoquan Wang, Weijun Gan, Mingju Zhang, Jack S. Shen
JOURNAL OF SURVEYING ENGINEERING
(2018)
Article
Geosciences, Multidisciplinary
Keke Xu, Weijun Gan, Jicang Wu
JOURNAL OF ASIAN EARTH SCIENCES
(2019)
Article
Environmental Sciences
Huizi Jian, Lifeng Wang, Weijun Gan, Keliang Zhang, Yanchuan Li, Shiming Liang, Yunhua Liu, Wenyu Gong, Xinzhong Yin
Article
Geography, Physical
Ling Zhang, Shiming Liang, Xiaoping Yang, Weijun Gan
Article
Chemistry, Analytical
Keliang Zhang, Yuebing Wang, Weijun Gan, Shiming Liang
Article
Geosciences, Multidisciplinary
Weijun Gan, Peter Molnar, Peizhen Zhang, Genru Xiao, Shiming Liang, Keliang Zhang, Zhangjun Li, Keke Xu, Ling Zhang
Summary: The eastward transport and clockwise rotation of crust dominate active deformation in the eastern region of the Tibetan Plateau. GPS measurements indicate ongoing distortion of the active Red River fault and the Mesozoic Yalong-Yulong-Longmen Shan thrust belt. The inferred pattern of deformation developed since approximately 10.1 million years ago, coinciding with various tectonic phenomena within the wider Eurasia/Indian collision zone.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geochemistry & Geophysics
Yanbao Li, Weijun Gan, Yuebing Wang, Weitao Chen, Shiming Liang, Keliang Zhang, Yongqi Zhang
GEODESY AND GEODYNAMICS
(2016)
Article
Geochemistry & Geophysics
Weitao Chen, Weijun Gan, Genru Xiao, Yuebing Wang, Weiping Lian, Shiming Liang, Keliang Zhang
GEODESY AND GEODYNAMICS
(2016)
Article
Geochemistry & Geophysics
Li Yan-Chuan, Shan Xin-Jiang, Song Xiao-Gang, Jiang-Yu, Gan Wei-Jun, Qu Chun-Yan, Wang Zhen-Jie
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
(2016)
Article
Geochemistry & Geophysics
Yanchuan Li, Chunyan Qu, Xinjian Shan, Xiaogang Song, Guohong Zhang, Weijun Gan, Shaoyan Wen, Zhenjie Wang
EARTHQUAKE SCIENCE
(2015)