Results 21 to 30 of about 828,391 (290)

Geomechanical Model Test and Energy Mechanism Analysis of Zonal Disintegration in Deep Surrounding Rock

open access: yesGeosciences, 2018
With the decreasing of shallow resources, underground roadways of resources exploitation have reached into deep rock mass with high geostress. A series of new failure phenomena such as zonal disintegration phenomenon were discovered in deep surrounding ...
Qiang Gao   +3 more
doaj   +1 more source

A New Method of Fatigue Life Prediction for Notched Specimen

open access: yesJournal of Aeronautical Materials, 2017
The simulations of the notched specimens under multiaxial loading were conducted by finite element method. The simulation results show that the stress gradient increases with the decrease in notch radius for the same strain path.
JIN Dan, GOU Zhifei
doaj   +1 more source

Localization properties of strain-softening gradient plasticity models. Part I: Strain-gradient theories

open access: yesInternational Journal of Solids and Structures, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jirásek, Milan, Rolshoven, Simon
openaire   +2 more sources

Strain gradient and electric field gradient effects in piezoelectric cantilever beams

open access: yesJournal of the Mechanical Behavior of Materials, 2015
A piezoelectric beam model with strain gradient and electric gradient effects is proposed. An energy variational principle with strain, strain gradient, electric field, and electric field gradient considered as independent variables is postulated to ...
Yue Yanmei, Xu Kaiyu, Aifantis Elias C.
doaj   +1 more source

Annealing Behavior of Surface-Locally Cold-Deformed Low-Carbon Steel with a Large Strain Gradient

open access: yesMetals, 2018
The annealing behavior of surface-locally cold-deformed 0.2 mass% carbon steel with a large strain gradient was investigated, with special attention paid to the change in grain size.
Xianguang Zhang   +2 more
doaj   +1 more source

Heterogeneous materials: a new class of materials with unprecedented mechanical properties

open access: yesMaterials Research Letters, 2017
Here we present a perspective on heterogeneous materials, a new class of materials possessing superior combinations of strength and ductility that are not accessible to their homogeneous counterparts.
Xiaolei Wu, Yuntian Zhu
doaj   +1 more source

Numerical Study of Microbeam with Geometric Discontinuity Under Electrostatic Load using Strain Gradient Theory [PDF]

open access: yesInternational Journal of Advanced Design and Manufacturing Technology, 2020
In this work, the pull in analysis of microbeam with geometric discontinuity for two different boundary conditions has been investigated. Boundary conditions are considered as Clamped-Free (CF) and Clamped-Clamped (CC).
Hadi Hamidizadeh   +2 more
doaj  

Theory and computation of higher gradient elasticity theories based on action principles [PDF]

open access: yes, 2017
In continuum mechanics, there exists a unique theory for elasticity, which includes the first gradient of displacement. The corresponding generalization of elasticity is referred to as strain gradient elasticity or higher gradient theories, where the ...
Abali, B. Emek   +2 more
core   +3 more sources

Gradients of Strain to Increase Strength and Ductility of Magnesium Alloys

open access: yesMetals, 2019
A strain gradient was produced in an AZ31B magnesium alloy through a plastic deformation of pure torsion at a torsional speed of π/2 per second. Compared with the base material and with the alloy processed by conventional severe plastic deformation,
Yao Liu, Songlin Cai
doaj   +1 more source

Role of GNDs in bending strength gain of multilayer deposition generated heterostructured bulk aluminum

open access: yesMaterials & Design, 2022
Gradient structured materials have been proven to have excellent mechanical properties, such as strength–ductility synergy and excellent strain hardening.
Xihang Zhao   +4 more
doaj   +1 more source

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