Results 31 to 40 of about 227,622 (300)

Preparation and characterization of SEBS-g-MAH-filled flexible polyurethane foam composites with gradient-changing structure

open access: yesMaterials & Design, 2019
This study constructs a flexible gradient foaming structure by changes the maleic anhydride-grafted styrene-ethylene/butylene-styrene (SEBS-g-MAH) content on the basis of a two-step foaming technique.
Ting-Ting Li   +6 more
doaj   +1 more source

Automatic detection of regions in spinach canopies responding to soil moisture deficit using combined visible and thermal imagery [PDF]

open access: yes, 2014
Thermal imaging has been used in the past for remote detection of regions of canopy showing symptoms of stress, including water deficit stress. Stress indices derived from thermal images have been used as an indicator of canopy water status, but these ...
Thompson, Andrew J.   +21 more
core   +1 more source

An Initial Residual Stress Inference Method by Incorporating Monitoring Data and Mechanism Model

open access: yesChinese Journal of Mechanical Engineering, 2022
Initial residual stress is the main reason causing machining deformation of the workpiece, which has been deemed as one of the most important aspects of machining quality issues.
Shuguo Wang   +3 more
doaj   +1 more source

Microfluidic Adaptation of Density-Gradient Centrifugation for Isolation of Particles and Cells

open access: yesBioengineering, 2017
Density-gradient centrifugation is a label-free approach that has been extensively used for cell separations. Though elegant, this process is time-consuming (>30 min), subjects cells to high levels of stress (>350 g) and relies on user skill to ...
Yuxi Sun, Palaniappan Sethu
doaj   +1 more source

Classification of failure modes of pipelines containing longitudinal surface cracks using mechanics-based and machine learning models

open access: yesJournal of Infrastructure Preservation and Resilience, 2023
This paper applies the mechanics-based approach and five machine learning algorithms to classify the failure mode (leak or rupture) of steel oil and gas pipelines containing longitudinally oriented surface cracks.
Haotian Sun, Wenxing Zhou
doaj   +1 more source

Application of the Higher-Order Hamilton Approach to the Nonlinear Free Vibrations Analysis of Porous FG Nano-Beams in a Hygrothermal Environment Based on a Local/Nonlocal Stress Gradient Model of Elasticity

open access: yesNanomaterials, 2022
Nonlinear transverse free vibrations of porous functionally-graded (FG) Bernoulli–Euler nanobeams in hygrothermal environments through the local/nonlocal stress gradient theory of elasticity were studied.
Rosa Penna   +3 more
doaj   +1 more source

A micromorphic approach to stress gradient elasticity theory with an assessment of the boundary conditions and size effects [PDF]

open access: yesZAMM - 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 ...
openaire   +1 more source

Four simplified gradient elasticity models for the simulation of dispersive wave propagation

open access: yes, 2008
Gradient elasticity theories can be used to simulate dispersive wave propagation as it occurs in heterogeneous materials. Compared to the second-order partial differential equations of classical elasticity, in its most general format gradient elasticity ...
Pichugin, AV   +7 more
core   +1 more source

Distribution of material properties in finite element models of inhomogeneous elements of structures [PDF]

open access: yesEPJ Web of Conferences, 2019
This paper discusses an approach to finite element modelling of structure elements considering material inhomogeneity. This approach is based on the functional dependence of mechanical properties on the spatial coordinates of finite elements.
Moskvichev Egor
doaj   +1 more source

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