A numerical analysis approach for evaluating elastic constants of sandwich structures with various cores

AbstractIn this paper we focus on the elastic and thermodynamic properties of the B1 phase of CaO by using the modified TBP model, including the role of temperature. We have successfully obtained the phase transition pressure and volume change at different temperatures. In addition elastic constants and bulk modulus of B1 phase of CaO at different temperatures are discussed. Our results are comparable with the previous ones at high temperatures and pressures. The thermodynamical properties of the B1 phase of CaO are also predicted.

Download Full-text

Autonomous dynamical system description of de Sitter evolution in scalar assisted f(R) − ϕ gravity

International Journal of Geometric Methods in Modern Physics ◽

10.1142/s0219887818502122 ◽

2018 ◽

Vol 15 (12) ◽

pp. 1850212 ◽

Cited By ~ 10

Author(s):

K. Kleidis ◽

V. K. Oikonomou

Keyword(s):

Dynamical System ◽

Numerical Analysis ◽

Scalar Field ◽

Analysis Approach ◽

Single Variable ◽

De Sitter ◽

Exponential Potential ◽

System Description ◽

Variable Formula ◽

Autonomous Dynamical System

In this paper we will study the cosmological dynamical system of an [Formula: see text] gravity in the presence of a canonical scalar field [Formula: see text] with an exponential potential by constructing the dynamical system in a way that it is rendered autonomous. This feature is controlled by a single variable [Formula: see text], which when it is constant, the dynamical system is autonomous. We focus on the [Formula: see text] case which, as we demonstrate by using a numerical analysis approach, leads to an unstable de Sitter attractor, which occurs after [Formula: see text] [Formula: see text]-foldings. This instability can be viewed as a graceful exit from inflation, which is inherent to the dynamics of de Sitter attractors.

Download Full-text

Experimental and numerical analysis of the bending behavior of 3D printed modified auxetic sandwich structures

Materials Today Proceedings ◽

10.1016/j.matpr.2021.11.425 ◽

2021 ◽

Author(s):

Niranjan Kumar Choudhry ◽

Shailesh Ravindra Bankar ◽

Biranchi Panda ◽

Harpreet Singh

Keyword(s):

Numerical Analysis ◽

Sandwich Structures ◽

3D Printed ◽

Bending Behavior

Download Full-text

Experimental and Numerical Analysis of Frequency Responses of Sandwich Structures

10.1007/978-3-030-85584-0_18 ◽

2021 ◽

pp. 173-181

Author(s):

Hamamed Najah ◽

Hentati Hamdi ◽

Bouaziz Slim ◽

Haddar Mohamed ◽

El Guerjouma Rachid ◽

...

Keyword(s):

Numerical Analysis ◽

Sandwich Structures ◽

Frequency Responses

Download Full-text

Green sandwich structures under impact: experimental vs numerical analysis

Procedia Structural Integrity ◽

10.1016/j.prostr.2018.11.084 ◽

2018 ◽

Vol 12 ◽

pp. 317-329 ◽

Cited By ~ 3

Author(s):

Simonetta Boria ◽

Elena Raponi ◽

Fabrizio Sarasini ◽

Jacopo Tirillò ◽

Luca Lampani

Keyword(s):

Numerical Analysis ◽

Sandwich Structures

Download Full-text

An Inverse Procedure for Determining the Material Constants of Isotropic Square Plates by Impulse Excitation of Vibration

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.3-4.287 ◽

2006 ◽

Vol 3-4 ◽

pp. 287-292 ◽

Cited By ~ 1

Author(s):

Marco Alfano ◽

Leonardo Pagnotta

Keyword(s):

Finite Element ◽

Numerical Analysis ◽

Carbon Steel ◽

Elastic Constants ◽

Natural Vibration ◽

Finite Element Code ◽

Resonant Frequencies ◽

Material Constants ◽

Impulse Excitation ◽

Inverse Procedure

The paper presents a procedure whereby the Poisson’s ratio and dynamic Young’s modulus of isotropic and homogeneous materials are determined using two of the first four frequencies of natural vibration in thin square plates. The procedure is based on suitable approximate relationships relating the resonant frequencies to the elastic constants of the material. These relations were derived from an extensive series of numerical analysis carried out by a finite element code. To measure the fundamental resonant frequencies, inexpensive computerized equipment is proposed. The procedure has been validated on Carbon Steel specimens.

Download Full-text