Facilitation and competition deconstructed: a mechanistic modelling approach to the stress gradient hypothesis applied to drylands [PDF]
Scientific ReportsFacilitative interactions among species are key in plant communities. While experimental tests support the Stress Gradient Hypothesis (SGH) as an association between facilitation and stress, whether the shape of net effects along stress gradients can be ...
Rubén Díaz-Sierra +3 more
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Influence of the stress gradient on the fatigue life calculation of a martensitic high strength steel [PDF]
Fracture and Structural Integrity, 2017 Nowadays lifetime calculation in the high cycle fatigue region is commonly based on S/N curves which are modified by different influences to ensure accurate results.
I. Milo�evic +3 more
doaj +9 more sources
MetalsGradient structure provides an effective approach to improve the combination of high strength and toughness compared to a uniform one. The gradient interfaces or boundaries in gradient-structured metallic glass composites play a crucial role in ...
Yongwei Wang, Guangping Zheng, Mo Li
doaj +2 more sources
Nonlinear flexure mechanics of beams: stress gradient and nonlocal integral theory
Materials Research Express, 2021 In order to study the intrinsic size-effects, the stress gradient theory is implemented to a nano-scale beam model in nonlinear flexure. The nonlocal integral elasticity model is considered as a suitable counterpart to examine the softening behavior of ...
Mahdad Fazlali +2 more
doaj +2 more sources
Environmental and Experimental Botany, 2021 Techniques to monitor oxidative stress pre-visually are essential to optimize plant management. Here, we investigated the capability of hyperspectral reflectance (350−2500 nm) to characterize responses of two pomegranate cultivars (Parfianka and ...
Remorini D. +5 more
core +2 more sources
Plane-Strain Problems for a Class of Gradient Elasticity Models-A Stress Function Approach
Journal of Elasticity, 2011 The plane strain problem is analyzed in detail for a class of isotropic, compressible, linearly elastic materials with a strain energy density function that depends on both the strain tensor epsilon and its spatial gradient a double dagger epsilon.
Aravas, N., Nikolaos Aravas
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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
openaire +2 more sources
Fatigue life prediction of notched components: a comparison between the theory of critical distance and the classical stress-gradient approach [PDF]
Procedia Engineering, 2011 Fatigue life prediction for machine components is a key factor in the industrial world and several methods can be traced in technical literature to estimate life of notched components.
SPAGGIARI, Andrea +7 more
core +4 more sources
A GRADIENT-LESS PARAMETER APPROACH FOR SHAPE OPTIMIZATION
Jixie qiangdu, 2016 A gradient-less parametrical approach has been employed to optimize the stress concentration on local part. The design boundary was represented by splines and the shape of boundary can be varied by adjusting the coordinate of control points.By doing so ...
TIAN Shuai +3 more
doaj +2 more sources
From uni- to multi-axial fretting-fatigue crack nucleation: Development of a stress-gradient-dependent critical distance approach [PDF]
International Journal of Fatigue, 2014 International audienceFretting fatigue is characterized by combined high stress gradients induced by contact loading and more homogeneous stress gradients induced by bulk fatigue stressing.
Gallien, Hervé +2 more
core +3 more sources