Results 11 to 20 of about 5,901,072 (257)

Micromechanical analysis of kinematic hardening in natural clay [PDF]

open access: yes, 2009
This paper presents a micromechanical analysis of the macroscopic behaviour of natural clay. A microstructural stress-strain model for clayey material has been developed which considers clay as a collection of clusters.
Academy of Finland (Grant 210744) (Funder)   +17 more
core   +4 more sources

Strength criterion of cross-anisotropic Q3 loess

open access: yesYantu gongcheng xuebao, 2018
The structure of loess consisting of vertically extended cracks and horizontally deposited planes makes the cross-anisotropic strength behavior.
XU Ping 1, SHAO Sheng-jun 2, ZHANG Shuai 1
doaj   +1 more source

Development and application of pneumatic hollow cylinder apparatus with four-direction dynamic loads

open access: yesYantu gongcheng xuebao, 2018
Only the torque can be dynamically controlled in the traditional hollow cylinder apparatus, and the dynamic shear tests can be carried out. The existing hollow cylinder apparatus is modified to have the four-direction vibration capability, including ...
LIN Nan , YE Guan-lin , WANG Jian-hua
doaj   +1 more source

Spatiotemporal Variations of Focal Mechanism Solutions and Stress Field of the 2019 Changning Ms 6.0 Earthquake Sequence

open access: yesFrontiers in Earth Science, 2022
The June 17, 2019, MS 6.0 Changning earthquake is the largest recorded event in the Sichuan basin, spatiotemporal variations of stress field may shed light on the seismogenic mechanism of the earthquake. We determined the focal mechanism solutions (FMSs)
Zhiwei Zhang   +5 more
doaj   +1 more source

Abnormal texture formation and mechanical anisotropy of pre-aging extruded Mg-Gd-Y-Zn-Zr alloy with large-scale

open access: yesJournal of Materials Research and Technology, 2022
In order to further explore the effect of pre-aging treatment on large-scale alloys, a pre-aging extruded Mg-9.32Gd-4.02Y-2.16Zn-0.48Zr (wt.%) alloy with large extrusion ratio (ER = 19.5) and extrusion temperature of 450 °C in large-scale (Φ308 mm × 800 ...
Zixuan Wang   +7 more
doaj   +1 more source

Numerical Modeling of Stress Disturbance Characteristics during Tunnel Excavation

open access: yesAdvances in Materials Science and Engineering, 2020
The stress state and principal stress axis changes of the stress-field tensor are analyzed during the advancement of a tunnel face on the basis of a given case study of the Jinping II Hydropower Station in China.
Zeqi Zhu   +3 more
doaj   +1 more source

Design of three-dimensional true earth pressure sensor and calculation of stress parameters

open access: yesYantu gongcheng xuebao, 2020
The stress state is the basis for evaluating the deformation and strength of soil. The maximum principal stress and its direction are the important basis for determining the generation and development process of sliding surface of slopes, foundation pits
CHEN Zhi-xiang 1, 2, SHAO Long-tan 1, 2, LI Shun-qun 3, GUO Xiao-xia 1, 2, TIAN Xiao-jian 1, 2
doaj   +1 more source

Method for calculating limit support pressure of face of shield tunnels considering principal stress axis rotation and soil arching effects in dry sand

open access: yesYantu gongcheng xuebao, 2023
For the deep-buried shield tunnels in dry cohesionless soils, it is critical to determine the support pressure acting on the tunnel face due to the significant soil arching effects.
ZHANG Yu 1, 2, TAO Lianjin 2, LIU Jun 1, ZHAO Xu 2, GUO Fei 3, BIAN Jin 4
doaj   +1 more source

Development and validation of Speech-Language Pathology Occupational Stress Questionnaire (SLP-OSQ)

open access: yesClinical Epidemiology and Global Health, 2022
Background: The objectives of the study were to develop and validate the Speech-Language Pathology Occupational Stress Questionnaire (SLP-OSQ). Further, to administer the questionnaire on practicing speech language pathologists in India across different ...
Pooja Nirmal Kumar   +3 more
doaj   +1 more source

An Experimental Study on the Strength Behavior of Compacted Loess under the Principal Stress Axis Rotation

open access: yesDEStech Transactions on Engineering and Technology Research, 2017
A series of consolidated-undrained tests was carried out on compacted loess with a hollow cylinder torsional shear apparatus to investigate the stress-strain characteristics and the strength behavior of the compacted loess under different stress paths.
Wu-Yu Zhang   +5 more
openaire   +2 more sources

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