scholarly journals Mechanical response of bilayer silicene nanoribbons under uniaxial tension

RSC Advances ◽  
2018 ◽  
Vol 8 (20) ◽  
pp. 10785-10793 ◽  
Author(s):  
M. R. Chávez-Castillo ◽  
M. A. Rodríguez-Meza ◽  
L. Meza-Montes
Keyword(s):  
Stress Distribution ◽  
Uniaxial Tension ◽  
Mechanical Response ◽  
Silicene Nanoribbons

Ghost vacancy effect on the stress distribution of bilayer silicene nanoribbons.

Simulation of Stress Distribution and Mechanical Response of Metallic Glasses

1998 ◽  
Vol 554 ◽  
Author(s):  
Y. Kogure ◽  
M. Doyama
Keyword(s):  
Stress Distribution ◽  
Metallic Glasses ◽  
Mechanical Response ◽  
Local Density ◽  
Glassy State ◽  
Dynamics Simulation ◽  
Single Atom ◽  
Atomic Interaction ◽  
Embedded Atom ◽  
Embedded Atom Method Potential

AbstractMolecular dynamics simulation of the metallic glasses has been done. The embedded atom method potential function for copper is used to express the atomic interaction. The stress distribution in the glassy state is evaluated from specific volume occupied by single atom and local density in divided cells. The displacements of individual atom under the shear stress are calculated and the correlation between the displacements and the atomic volumes are investigated.

Stress distribution and mechanical response of PCCP with broken wires

2021 ◽  
Vol 245 ◽  
pp. 112858
Author(s):  
Kejie Zhai ◽  
Chengchao Guo ◽  
Hongyuan Fang ◽  
Bin Li ◽  
Baosong Ma ◽  
...  
Keyword(s):  
Stress Distribution ◽  
Mechanical Response

Stress Distribution in and Around Spheroidal Inclusions and Voids at Finite Concentration

1986 ◽  
Vol 53 (3) ◽  
pp. 511-518 ◽  
Author(s):  
G. P. Tandon ◽  
G. J. Weng
Keyword(s):  
Stress Distribution ◽  
Energy Distribution ◽  
Uniaxial Tension ◽  
Elastic Stress ◽  
Three Dimensional ◽  
Tensile Loading ◽  
Form Solution ◽  
Finite Concentration ◽  
The Matrix ◽  
Close Form

A simple, albeit approximate, close-form solution is developed to study the elastic stress and energy distribution in and around spheroidal inclusions and voids at finite concentration. This theory combines Eshelby’s solution of an ellipsoidal inclusion and Mori- Tanaka’s concept of average stress in the matrix. The inclusions are taken to be homogeneously dispersed and undirectionally aligned. The analytical results are obtained for the general three-dimensional loading, and further simplified for uniaxial tension applied parallel to the axis of inclusions. The ensuing stress and energy fields under tensile loading are illustrated for both hard inclusions and voids, ranging from prolate to oblate shapes, at several concentrations.

Hierarchical Structure and Properties of Graphene Oxide Papers

2013 ◽  
Vol 80 (4) ◽  
Author(s):  
Charles D. Wood ◽  
Marc J. Palmeri ◽  
Karl W. Putz ◽  
Zhi An ◽  
SonBinh T. Nguyen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Structural Feature ◽  
Uniaxial Tension ◽  
Hierarchical Structure ◽  
Mechanical Response ◽  
Structure And Properties ◽  
Fracture Surfaces ◽  
High Stiffness ◽  
Significant Attention

The mechanical properties of graphene oxide papers have attracted significant attention in recent years due to their high stiffness and tough behavior. While the structural feature most commonly characterized is the nanosheet spacing, there is a hierarchical structure, which is likely responsible for the impressive mechanical properties. In this paper, we examine the structure of graphene oxide papers on several length scales using novel techniques to distinguish between lamellae and a newly defined feature, termed “super-lamellae.” The differentiation between these intermediate features provides context to the previously observed mechanical response and fracture surfaces of graphene oxide papers, particularly under uniaxial tension.

scholarly journals Elasto-Plastic Stresses in a Functionally Graded Rotating Disk

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
Babak Haghpanah Jahromi ◽  
Hamid Nayeb-Hashemi ◽  
Ashkan Vaziri
Keyword(s):  
Stress Distribution ◽  
Stress Field ◽  
Mechanical Response ◽  
Rotating Disk ◽  
Outer Edge ◽  
Outer Radius ◽  
Disk Center ◽  
Functionally Graded ◽  
Von Mises Stress ◽  
Metal Ceramic

A numerical method based on the extension of the variable material property method was developed to obtain the elasto-plastic stress field in a functionally graded (FG) rotating disk. The method was applied to estimate the stress field in a metal–ceramic functionally graded solid disk. To establish the validity of the proposed method, results were compared with finite element results. Unlike uniform rotating disks, where yielding starts from the disk center, plasticity in FG disks can originate at any point. The effect of different metal–ceramic grading patterns as well as the relative elastic moduli and densities of the ceramic and metallic constituents on the developed stresses were studied. Reinforcement of a metal disk with ceramic particles, in both elastic and plastic regimes, can significantly influence the mechanical response of the disk such as the stress distribution and the critical angular velocities corresponding to the onset of plasticity in the disk and plastic disk. Disks with increasing ceramic content from inner to outer radius showed a more uniform von Mises stress distribution for a fixed value of total ceramic content. In contrast, disks with decreasing ceramic content from inner to outer radius had the lowest outer edge displacement for a fixed value of total ceramic content.

scholarly journals Comparative Stress Evaluation between Bilayer, Monolithic and Cutback All-Ceramic Crown Designs: 3D Finite Element Study

Prosthesis ◽  
2021 ◽  
Vol 3 (2) ◽  
pp. 173-180
Author(s):  
Nathália de Carvalho Ramos ◽  
Gabriela Freitas Ramos ◽  
Marcela Moreira Penteado ◽  
Renata Marques de Melo ◽  
Alexandre Luiz Souto Borges ◽  
...  
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Mechanical Response ◽  
Three Dimensional ◽  
Maximum Principal Stress ◽  
Mechanical Analysis ◽  
Element Analysis ◽  
All Ceramic ◽  
Homogeneous Stress ◽  
Ceramic Crown

Different all-ceramic crown designs are available to perform indirect restoration; however, the mechanical response of each model should still be elucidated. The study aims to evaluate the stress distribution in three different zirconia crown designs using finite element analysis. Different three-dimensional molar crowns were simulated: conventional bilayer zirconia covered with porcelain, a monolithic full-contour zirconia crown, and the cutback modified zirconia crown with porcelain veneered buccal face. The models were imported to the computer-aided engineering (CAE) software. Tetrahedral elements were used to form the mesh and the mechanical properties were assumed as isotropic, linear and homogeneous materials. The contacts were considered ideal. For the static structural mechanical analysis, 100 N occlusal load was applied and the bone tissue was fixed. Maximum principal stress showed that the stress pattern was different for the three crown designs, and the traditional bilayer model showed higher stress magnitude comparing to the other models. However, grayscale stress maps showed homogeneous stress distribution for all models. The all-ceramic crown designs affect the stress distribution, and the cutback porcelain-veneered zirconia crown can be a viable alternative to adequate function and esthetic when the monolithic zirconia crown cannot be indicated.

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