Results 11 to 20 of about 68,365 (261)

Stress Majorization with Orthogonal Ordering Constraints [PDF]

open access: yes, 2006
Force-directed placement is a widely used approach to automatically arranging the nodes and edges of a relational diagram or graph in an aesthetically pleasing manner. The adoption of the stress majorization method from multi-dimensional scaling into graph layout has provided an improved mathematical basis and better convergence properties for so ...
Tim Dwyer, Yehuda Koren, Kim Marriott
openaire   +1 more source

An Optimality-Theoretic Analysis of the Acquisition of English Sentence Stress Based on Acoustic Data

open access: yesComplexity, 2021
The present study adopts both empirical and theoretical methods for the analysis of the acquisition of English sentence stress based on Optimality Theory, aiming to overcome mispronunciation of English sentence stress.
Wen Ji, Yun Liu
doaj   +1 more source

Soil coarsening alleviates precipitation constraint on vegetation growth in global drylands

open access: yesEnvironmental Research Letters, 2022
Drought is an important and complicated topic, and the specific variables that are considered to represent climate drought stress and plant water stress often generate highly contradictory conclusions. As the junction of the atmosphere and the biosphere,
Xinrong Zhu   +5 more
doaj   +1 more source

Stress Triaxial Constraint and Fracture Toughness Properties of X90 Pipeline Steel

open access: yesMetals, 2022
The X90 pipeline steel with high-strength and high-toughness become the most popular pipeline steel. Due to the stress triaxial constraint and fracture toughness properties are the key factors for the stable work of pipeline steel, the research on the ...
Peng Wang   +5 more
doaj   +1 more source

Specimen thickness effect on elastic-plastic constraint parameter A [PDF]

open access: yesFracture and Structural Integrity, 2015
Three-dimensional elastic-plastic problems for a power-law hardening material are solved using the finite element method. Distributions of the J-integral and constraint parameter A along the crack front for varying specimen thickness and crack depth are ...
G.P. Nikishkov, Yu.G. Matvienko
doaj   +2 more sources

Experimental Study on Blasting Energy Distribution and Utilization Efficiency Using Water Jet Test

open access: yesEnergies, 2020
The blasting stress wave and blasting gas generated by explosive blasting are the two main motive powers of rock fragmentation. An experimental method based on water jet test is used to study the energy distribution ratio of blasting stress wave and ...
Chenxi Ding   +4 more
doaj   +1 more source

Comparison of the constraint parameters in elastic-plastic fracture mechanics Focused on Crack Tip Fields

open access: yesFracture and Structural Integrity, 2019
To describe the effect of crack-tip constraint on the stress field for finite cracked bodies, the following most widely used constraint parameters can be employed in elastic-plastic fracture mechanics, namely, local triaxiality parameter, constraint ...
Yu. G. Matvienko
doaj   +1 more source

Variation of stress intensity factor and elastic T-stress along the crack-front in finite thickness plates

open access: yesFracture and Structural Integrity, 2013
Non-singular terms in the series expansion of the elastic crack-tip stress fields, commonly referred to as the T-stress. The T-stress is as an additional stress field characterizing parameter to stress intensity factor (K) in the analysis of cracked ...
K. G. Kodancha, S. K. Kudari
doaj   +3 more sources

Representative Stress-Strain Curve by Spherical Indentation on Elastic-Plastic Materials

open access: yesAdvances in Materials Science and Engineering, 2018
Tensile stress-strain curve of metallic materials can be determined by the representative stress-strain curve from the spherical indentation. Tabor empirically determined the stress constraint factor (stress CF), ψ, and strain constraint factor (strain ...
Chao Chang   +4 more
doaj   +1 more source

A criterion for fatigue failure mode evaluation of U-rib to deck joints

open access: yesJournal of Materials Research and Technology, 2022
In this study, a numerical analysis model was established, on basis of the traction structural stress method, for fatigue failure mode prediction of orthotropic bridge deck (OBD) under symmetric three-point bending conditions. The structural stress-based
Haibo Yang   +3 more
doaj   +1 more source

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