Results 101 to 110 of about 4,803 (295)

基于多尺度晶体塑性有限元的GCr15轴承钢拉-压不对称性研究

Jixie qiangdu, 2021
In this paper,stress triaxiality is added to the classical crystal plasticity constitutive model to investigate the experimental phenomenon of tension-compression asymmetry for the GCr15 bearing steel.Firstly, the crystal plasticity constitutive model is
樊冬, 余丰, 李淑欣
doaj  

Influence of triaxiality and second-order terms in flattenings on the rotation of terrestrial planets

, 2002
Unlike for the Earth, the equatorial flattening of Mars is important and almost of the same magnitude as the polar flattening. The classical semi-analytical model for the rotation of an ellipsoidal rotating planet with an elastic mantle and ...
T. Van Hoolst, V. Dehant, Dehant, Véronique, Van Hoolst, T.   +3 more
core   +1 more source

Multi‐factor coupling effects in hydraulic fracturing of laminated shale: Experimental insights and physics‐informed neural network‐driven optimization

Deep Underground Science and Engineering, EarlyView.
This study establishes a multi‐factor coupling framework for predicting breakdown pressure in laminated shale by integrating experimental hydraulic fracturing tests, physics‐informed neural networks (PINNs), and Sobol sensitivity analysis. It reveals how differential stress, the bedding dip angle, and the injection rate interact to influence fracture ...
Tao Wang, Guoyao Xu, Liyuan Liu, Yao Zhang, Sitao Zhu, Hongyang Chu, Kaikai Zhao   +6 more
wiley   +1 more source

Numerical research on anti‐dislocation measures design of deep‐buried tunnels in an anisotropic rock mass area

Deep Underground Science and Engineering, EarlyView.
This paper conducts a numerical simulation study on the construction of a deep‐buried tunnel in an anisotropic stratum area. A statistical analysis of the effects of two anti‐faulting design measures, namely, a conventional design and an articulated design, is carried out, and the results demonstrate the effectiveness of the anti‐faulting structures ...
Shiqi Liu, Huanling Wang, Yong Zhou, Zhen Wang   +3 more
wiley   +1 more source

Probabilistic characterization of seepage‐induced tunnel face failure via a two‐phase double‐point material point method

Deep Underground Science and Engineering, EarlyView.
To address seepage‐induced tunnel face collapse, this study develops a two‐phase double‐point MPM framework to capture large‐deformation hydro‐mechanical interactions. Incorporating a cementation‐based constitutive model with dynamic permeability updates, the model is successfully validated against saturated granular‐column collapse experiments ...
Yue Tong, Mingliang Zhou, Jie Xu, Zeyu Li, Yisheng Zhao, Jin An, Hongwei Huang   +6 more
wiley   +1 more source

Testing for triaxiality with kinematic data [PDF]

Monthly Notices of the Royal Astronomical Society, 1985
Des modeles cinematiques simples de galaxies elliptiques sont utilises pour montrer que si les galaxies sont triaxiales, les vitesses de rotation suivant leurs axes principaux apparents doivent etre associees a des mouvements similaires suivant leurs petits axes apparents.
openaire   +2 more sources

Dynamic prediction of coal and gas outburst risk based on quantitative analysis of stress–energy evolution and adaptive correction

Deep Underground Science and Engineering, EarlyView.
This study quantitatively analyzed the spatiotemporal evolution of stress redistribution ahead of the working face by integrating coal seam distribution, tectonic stress anomalies, gas pressure, and mining‐induced disturbances. An R‐value criterion for coal and gas outburst (CGO) risk assessment was established based on energy principles.
Yingjie Zhao, Xueqiu He, Dazhao Song, Liming Qiu, Minggong Guo, Jie Liu, Qiang Liu, Yi Zhu   +7 more
wiley   +1 more source

Real‐time multiscale characterization of water migration in deep coal under stepwise pressure‐increasing injection: Combined low‐field nuclear magnetic resonance and multifractal approach

Deep Underground Science and Engineering, EarlyView.
The graphical abstract illustrates the real‐time multiscale characterization of water migration in deep coal under stepwise pressure‐increasing injection. Under in‐situ hydrostatic pressure, the water invasion front advances progressively along the axial direction as the injection pressure increases stepwise, tracked in real time by nuclear magnetic ...
Lei Song, Hongwei Zhou, Zelin Liu, Yimeng Wang, Xiaohai Zhang, Mingyuan Lu, Yang Ju   +6 more
wiley   +1 more source

Stress triaxiality and failure in SFRPs: a novel workflow for failure curve determination, considering fibre orientation and specimen geometry

Polymer Testing
This research investigates the static failure behaviour of a PA6T/6I GF50, focusing on the distribution of the stress triaxiality at critical points where failure is expected.
F.E. Fiorini, A. Canegrati, L.M. Martulli, P. Steck, A. Bernasconi   +4 more
doaj   +1 more source

Feeling Better Before, Not After: An Ecological Momentary Assessment of Affect Around Exercise in Women With Eating Disorders

International Journal of Eating Disorders, EarlyView.
ABSTRACT Objective Maladaptive exercise includes excessive, compulsive, or compensatory exercise and is a common eating‐disorder (ED) symptom associated with increased severity, slower rates‐of‐recovery, and faster rates‐of‐relapse. Affect‐regulation theories posit that maladaptive exercise functions to reduce high negative affect (NA), although ...
Danielle A. N. Chapa, Kelsie T. Forbush, Yiyang Chen, Courtney E. Costain, Samiya I. Rasheed   +4 more
wiley   +1 more source