Results 21 to 30 of about 760,552 (308)
A micromorphic approach to stress gradient elasticity theory with an assessment of the boundary conditions and size effects [PDF]
ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 2018 AbstractBasing on thermodynamics principles, a stress gradient elasticity theory is presented whereby the material is modeled as a centro‐symmetric micromorphic anisotropic material. A principle of minimum complementary energy and a stationarity principle of Hellinger–Reissner type are provided, by which the boundary conditions are uniquely determined ...
Castrenze Polizzotto
openalex +2 more sources
Procedia Engineering, 2011 Abstract 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. The paper correlates the classical stress-gradient approach, here after called support factor (SF) method, proposed by Siebel, Neuber and Petersen with the ...
Andrea Spaggiari +3 more
openalex +4 more sources
Agricultural Water Management, 2020 Grapevine is a widespread crop for grape and wine production, often cultivated on hilly areas. Moderate vine water stress plays an important role in determining high-quality viticulture. However, a precise quantification of the effect of hydraulic properties and slope gradient on hilly soil water balance and consequently on vine stress has not yet been
Angelo Basile +6 more
openalex +6 more sources
Development and validation of a machine learning model for predicting occupational stress among primary and secondary school teachers [PDF]
Frontiers in Public HealthBackgroundTo address the limitations of traditional linear tools in predicting teacher occupational stress, this study aimed to develop and validate machine learning models using easily obtainable, self-reported data.MethodA cross-sectional study of 2 ...
Jinyu Wang, Xinran Zhang, Sheng Li
doaj +2 more sources
X-ray analysis of residual stress gradients in TiN coatings by a Laplace space approach and cross-sectional nanodiffraction: a critical comparison [PDF]
Journal of Applied Crystallography, 2013 Novel scanning synchrotron cross-sectional nanobeam and conventional laboratory as well as synchrotron Laplace X-ray diffraction methods are used to characterize residual stresses in exemplary 11.5 µm-thick TiN coatings. Both real and Laplace space approaches reveal a homogeneous tensile stress state and a very pronounced compressive stress gradient in
Mario Stefenelli +7 more
openalex +3 more sources
Ecological Indicators, 2010 Abstract Quantifying relative habitat quality is an important means of ecosystem assessment, and an essential step in the development and validation of indices of biotic integrity (IBI). Variables included in multi-metric IBIs are selected on the basis of their correlation with a human disturbance gradient, and the IBI is tested by examining ...
Rebecca C. Rooney, Suzanne E. Bayley
openaire +3 more sources
Procedia Engineering, 2018 This study is dedicated to the effect of surface defects on the fatigue behaviour of high strength steels and the evaluation of their sensitivity. For that purpose, defects were introduced by Electro-Discharge Machining (EDM) on the edge of sheet metal test samples. Different defect depths are tested on high strength steel grades.
Fabienne Pennec +5 more
openalex +4 more sources
Journal of Structural Engineering, 2017 AbstractThis article presents a computationally efficient methodology for stress-based topology optimization of steel frame structures with cross-sectional properties that are mapped from I-beam se...
Navid Changizi, Mehdi Jalalpour
openalex +3 more sources
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 +5 more sources