Numerical approach for a continuum theory with higher stress gradients [PDF]
PAMM, 2021 AbstractWe use an extended balance of linear momentum derived from stress field analysis of higher order terms in power series expansion. Thus, the balance equation accounts for higher gradients of stress in the contiguity of continuum points. Interestingly, it does not coincide with the balance of linear momentum from strain gradient elasticity.
Ghasemi, Seyed Ali +3 more
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Evaluation of extremely steep residual stress gradients based on a combined approach using laboratory-scale equipment [PDF]
Journal of Applied Crystallography, 2021 Surface treatments characterized by rapid heating and cooling (e.g. laser hardening) can induce very steep residual stress gradients in the direct vicinity of the area being treated. These gradients cannot be characterized with sufficient accuracy by means of the classical sin2Ψ approach applying angle-dispersive X-ray diffraction.
Andreas Fischer +3 more
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Stress Gradient Effects on Notched Composite Failure Using a Local-Global Approach [PDF]
45th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics & Materials Conference, 2004 Micromechanics based analysis to predict damage initiation in compressively loaded symmetric notched multidirectional laminates under remote uniaxial loading is described. A novel hybrid local-global finite element method in conjunction with the commercial code ABAQUS is used to solve the governing system of equations.
Ahn, Junghyun, Waas, Anthony M.
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Matrix exponential-based closures for the turbulent subgrid-scale stress tensor [PDF]
, 2009 Two approaches for closing the turbulence subgrid-scale stress tensor in terms of matrix exponentials are introduced and compared. The first approach is based on a formal solution of the stress transport equation in which the production terms can be ...
C. Truesdell +12 more
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A Novel Estimation Approach of Pressure Gradient and Haemodynamic Stresses as Indicators of Pathological Aortic Flow Using Subvoxel Modelling [PDF]
IEEE Transactions on Biomedical Engineering, 2021 The flow downstream from aortic stenoses is characterised by the onset of shear-induced turbulence that leads to irreversible pressure losses. These extra losses represent an increased resistance that impacts cardiac efficiency. A novel approach is suggested in this study to accurately evaluate the pressure gradient profile along the aorta centreline ...
Pascal Corso +4 more
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Geometrical statistics and vortex structures in helical and nonhelical turbulences [PDF]
, 2010 In this paper we conduct an analysis of the geometrical and vortical statistics in the small scales of helical and nonhelical turbulences generated with direct numerical simulations.
Gulitski G. +3 more
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Gradient elasticity: a transformative stress analysis tool to design notched components against uniaxial/multiaxial high-cycle fatigue [PDF]
, 2016 This paper investigates the accuracy of gradient elasticity in estimating high-cycle fatigue strength of notched components subjected to both uniaxial and multiaxial fatigue loading. A novel design methodology is formulated by combining Ru and Aifantis’
Aifantis +49 more
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Environmental stress, facilitation, competition, and coexistence [PDF]
, 2013 The major theories regarding the combined influence of the environment and species interactions on population and community dynamics appear to conflict. Stress/disturbance gradient models of community organization, such as the stress gradient hypothesis,
Hart, Simon P., Marshall, Dustin J.
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Interactive Mesh-Free Stress Analysis for Mechanical Design Assembly With Haptics [PDF]
, 2007 This paper describes a virtual reality application that performs fast stress reanalysis coupled with virtual reality and haptics that allows rapid evaluation of multiple designs throughout the product design process.
Faas, Daniela +3 more
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Generalized Terzaghi’s Effective Stress Equation for Unsaturated Soil: An Independent Phase Balance Approach That Considers a Pore Water Content Gradient [PDF]
Geofluids, 2022 The effective stress equation for unsaturated soil is the most important equation in unsaturated soil mechanics. It has been derived by many scholars using different methods. However, none of them considered the gradient of the pore water content, which results in unreasonable force balance equations for different constituent phases in unsaturated soil.
Lifeng Zeng, Longtan Shao
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