On the elastic field perturbation by inhomogeneities in plane elasticity

1982 ◽  
Vol 33 (3) ◽  
pp. 315-325 ◽  
Author(s):  
L. Stagni
Keyword(s):  
Elastic Field ◽  
Plane Elasticity ◽  
Field Perturbation

Interaction Between an Edge Dislocation and a Lamellar Inhomogeneity With a Slipping Interface

1992 ◽  
Vol 59 (1) ◽  
pp. 215-217 ◽  
Author(s):  
L. Stagni ◽  
R. Lizzio
Keyword(s):  
Elastic Constants ◽  
Edge Dislocation ◽  
Stable Equilibrium ◽  
Finite Thickness ◽  
Elastic Field ◽  
Image Force ◽  
Plane Elasticity ◽  
Matrix Interface ◽  
Stable Equilibrium Position ◽  
Plane Elasticity Problem

The plane elasticity problem of an internal stress source located near a lamellar inhomogeneity is considered. It is assumed that the lamella-matrix interface does not transmit tangential displacements or shear tractions (slipping interface). The elastic field is given in terms of the source bulk field and one parameter formed from the elastic constants. The image force on an edge dislocation near the lamella is calculated and discussed. A dislocation stable-equilibrium position exists in a domain of elastic constants and Burgers vector directions. This result is characteristic of the interaction with a slipping lamellar inhomogeneity having finite thickness.

The study of the elastic deformation of a flexible wheel by a cam wave generator

2020 ◽  
Vol 65 (1) ◽  
pp. 51-58
Author(s):  
Sava Ianici
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Elastic Deformation ◽  
Theoretical Study ◽  
Elastic Field ◽  
The Finite Element Method ◽  
Elastic Deformations ◽  
Wave Generator ◽  
Two Stages

The paper presents the results of research on the study of the elastic deformation of a flexible wheel from a double harmonic transmission, under the action of a cam wave generator. Knowing exactly how the flexible wheel is deformed is important in correctly establishing the geometric parameters of the wheels teeth, allowing a better understanding and appreciation of the specific conditions of harmonic gearings in the two stages of the transmission. The veracity of the results of this theoretical study on the calculation of elastic deformations and displacements of points located on the average fiber of the flexible wheel was subsequently verified and confirmed by numerical simulation of the flexible wheel, in the elastic field, using the finite element method from SolidWorks Simulation.

scholarly journals An enhanced VEM formulation for plane elasticity

2021 ◽  
Vol 376 ◽  
pp. 113663
Author(s):  
A.M. D’Altri ◽  
S. de Miranda ◽  
L. Patruno ◽  
E. Sacco
Keyword(s):  
Plane Elasticity

scholarly journals Anomalous shape effect of nanosized helium bubble on the elastic field in irradiated tungsten

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Xinlong Huang ◽  
Chenyangtao Lv ◽  
Haijian Chu
Keyword(s):  
Normal Stress ◽  
Elastic Field ◽  
Elastic Response ◽  
Shape Effect ◽  
Triple Junctions ◽  
Equilibrium Pressure ◽  
Bubble Pressure ◽  
Mechanism Transition ◽  
Geometry Characteristic ◽  
Anomalous Shape

AbstractBubble pressure and elastic response in helium-irradiated tungsten are systematically investigated in this study. An anomalous shape effect is found that the radial normal stress and mean stress distributions around a nanosized void or bubble are far from the spherical symmetry, which is ascribed to polyhedral geometry characteristic of the nanosized bubble and physical mechanism transition from crystal surfaces dominated to the surface ledges and triple junctions dominated. Molecular simulation shows that Young–Laplace equation is not suitable for directly predicting equilibrium pressure for nanosized bubble in crystals. Consequently, a new criterion of average radial normal stress of spherical shell is proposed to polish the concept of equilibrium pressure of helium bubbles. Moreover, the dependences of bubble size, temperature and helium/vacancy ratio (He/Vac ratio) on the bubble pressure are all documented, which may provide an insight into the understanding of mechanical properties of helium-irradiated tungsten.

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