Elastic moduli of boron nitride nanotubes based on finite element method

2018 ◽  
Vol 13 (3) ◽  
pp. 351-363
Author(s):  
Hossein Hemmatian ◽  
Mohammad Reza Zamani ◽  
Jafar Eskandari Jam
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Boron Nitride ◽  
Elastic Moduli ◽  
Boron Nitride Nanotubes ◽  
Element Method

scholarly journals Elastic Properties of Boron-Nitride Nanotubes through an Atomic Simulation Method

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Jixiao Tao ◽  
Guangmin Xu ◽  
Yuzhou Sun
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Boron Nitride ◽  
Young’S Modulus ◽  
Elastic Properties ◽  
Simulation Method ◽  
Boron Nitride Nanotubes ◽  
Atomic Scale ◽  
Atomic Simulation ◽  
Element Method

The elastic properties of the boron-nitride nanotubes are studied based on an atomic simulation method that is called atomic-scale finite element method. The Tersoff-Brenner potential is used to describe the interaction between boron and nitrogen atoms, and the computational method is established in an atomic-scale scheme similar to the classical finite element method. Young’s modulus is evaluated for the boron-nitride nanotubes, and their buckling behavior is analyzed. It is shown that the diameter has an obvious influence on Young’s modulus of BNNTs, and the buckling is little related to the length of the nanotubes.

Finite element investigation of the vibrational behavior of concentric multi-walled boron nitride and carbon nanotubes

2017 ◽  
Vol 31 (04) ◽  
pp. 1750018 ◽  
Author(s):  
R. Ansari ◽  
S. Rouhi ◽  
A. Nikkar
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Boron Nitride ◽  
Natural Frequencies ◽  
Vacancy Defect ◽  
Boron Nitride Nanotubes ◽  
The Finite Element Method ◽  
Zigzag Nanotubes ◽  
Vibrational Behavior ◽  
Vibrational Characteristics

This paper concerns the vibrational behavior of concentric double-walled and triple-walled carbon and boron nitride nanotubes using the finite element method. Armchair and zigzag nanotubes with different lengths and diameters are considered. Moreover, different boundary conditions are applied on the nanotubes. It is observed that in double-walled nanotubes, when the inner and outer layers are respectively from boron nitride and carbon, the frequencies are larger than those in the reverse arrangement. Investigating the effect of diameter on the first 10 natural frequencies of double-walled and triple-walled nanotubes showed that nanotubes with larger diameters possess smaller frequencies. The effect of diameter is more significant for higher modes. Finally, comparisons are made between the vibrational behavior of concentric carbon and boron nitride double-walled and triple-walled nanotubes. Considering the effect of vacancy defect on the vibrational characteristics of the nanotubes revealed that when all of the walls of the nanotubes are defective, the largest diminish occurs for the fundamental natural frequencies.

Design of Flexible Grinding Wheel With Variable Hub Thickness

1994 ◽  
Vol 116 (2) ◽  
pp. 260-262 ◽  
Author(s):  
Z. M. Bzymek ◽  
G. Song ◽  
T. D. Howes ◽  
R. E. Garrett
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Boron Nitride ◽  
Variable Thickness ◽  
Cubic Boron Nitride ◽  
Grinding Wheel ◽  
The Finite Element Method ◽  
Grinding Wheels ◽  
Major Step ◽  
Element Method

In this paper, various Cubic Boron Nitride (CBN) grinding wheels designed to suppress chatter are statically and dynamically analyzed and compared by means of the Finite Element Method (FEM). As a result of these analyses, a flexible wheel with a variable thickness hub is proposed. Theoretically, the new wheel should suppress chatter and thus be a major step forward in grinding wheel design.

scholarly journals An application of finite element method to soil-foundation interaction analyses

1974 ◽  
Vol 7 (4) ◽  
pp. 188-199
Author(s):  
Eiichi Kuribayashi ◽  
Yutaka Lida
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Characteristics ◽  
Elastic Moduli ◽  
Field Tests ◽  
Response Analysis ◽  
Actual Structure ◽  
Adjacent Structures ◽  
Soil Foundation ◽  
Element Method

This paper discusses the soil-foundation interaction of an actual structure. The Kanmon Bridge, completed in November 1973, is a three span suspension bridge with 712m center span crossing over the Kanmon Strait between Shimonoseki in Honshu main island and Moji in Kyushu island. During the construction period dynamic field tests on both of the foundations of two main towers were carried out. The Shimonoseki-side foundation, 40m wide, 20m long and 14m deep, weighs about 25,000t and the Moji-side foundation, 40m wide, 20m long and 30m deep, weighs about 50,000t. Their bottoms reach to sound rock layers. Sinusoidal vibratory horizontal forces, up to 35t at 5.5c/s and 40t at 12c/s, were applied to the tops of the foundations. Several peaks appear in resonance curves. In considering the appearance of these peaks, interaction between the structure and the surrounding ground should be taken into consideration. Some analyses were conducted to estimate elastic moduli of the soils and to obtain dynamic characteristics of the Moji-side foundation. From the tests and the analyses the following may be concluded. 1) Elastic moduli of the soils are considerably greater (about 5 times) than those used in the design, therefore displacement due to seismic excitations during future earthquakes may be smaller than those expected in the design. 2) In discussing dynamic characteristics of huge foundations it is necessitated to consider the effects of geological and topographical features and of adjacent structures. And dynamic characteristics of those structures can be satisfactorily obtained by a response analysis on the basis of the finite element method.

scholarly journals THE SIZE EFFECT IN MECHANICS PROPERTIES OF BORON NITRIDE NANOTUBE UNDER TENSION

2017 ◽  
Vol 55 (4) ◽  
pp. 475 ◽  
Author(s):  
Danh Truong Nguyen
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Boron Nitride ◽  
Size Effect ◽  
Uniaxial Tension ◽  
Axial Stress ◽  
Boron Nitride Nanotubes ◽  
Boron Nitride Nanotube ◽  
Armchair Nanotubes ◽  
The Given

This work aimed at investigating the mechanicals properties of boron nitride nanotubes (BN-NTs) under uniaxial tension using atomic finite element method with Tersoff potential. The zigzag and armchair nanotubes with different length and diameter are considered for researching effect on mechanicals behavior of BN-NTs. It is found that Young’s modulus of BN-NTs are independent of the tubular length, but slightly increase when the diameter go rise. At the given strain, axial stress in the armchair tubes is higher than that in the zigzag ones.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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