Vietnam Journal of Mechanics
2815-5882
Cơ quản chủ quản: N/A
Phân tích ảnh hưởng
Các bài báo tiêu biểu
QUADRATIC AND CUBIC NON-LINEARITIES IN A QUASI-LINEAR PARAMETRICALLY-EXCITED SYSTEM
Tập 15 Số 3 - Trang 14-21 - 1993
A quasi-linear oscillating system always contains weak factors (negative and
positive frictions, exciting forces in resonances, non-linarites of restoring
forces) usually characterized by a small parameters €. Recently, some articles
have distinguished the degree of smallness of different factors and
interesting phenomena have been found [3, 4]. In the present paper, using the
same manner, we sh...
An error compensation controller for milling robots
Tập 45 Số 2 - Trang 105-116 - 2023
This paper presents a method of controlling a serial robot for milling by an
inverse kinematic controller combined with an outer PD loop (Inverse Dynamics +
PD controller), with calibration and compensation of errors in calculating the
cutting forces. Because the cutting forces are generated at the time of cutting,
at the contact area between the workpiece and the cutting tool, the generalized
for...
#milling robot #robotic machining #robot dynamics #cutting force calibration #robot control
Thermal postbuckling analysis of FG-CNTRC doubly curved panels with elastically restrained edges using Reddy's higher order shear deformation theory
Tập 42 Số 3 - Trang 307-320 - 2020
For the first time, postbuckling behavior of thick doubly curved panels made of
carbon nanotube reinforced composite (CNTRC), under preexisting external
pressure and subjected to uniform temperature rise is analyzed in this paper.
Carbon nanotubes (CNTs) are reinforced into matrix through functionally graded
(FG) distribution patterns, and effective properties of CNTRC are determined
according to ...
#CNT-reinforced composite #thermal postbuckling response #higher order shear deformation theory #doubly curved panels #tangential edge constraints
Mechanical response of outer frames in tuning fork gyroscope model with connecting diamond-shaped frame
Tập 41 Số 1 - Trang 79-87 - 2019
In tuning fork micro-gyroscopes, two outer frames are connected by using the
linking elements. The driving vibrations of the two outer frames are required to
be exactly opposite to generate the opposite sensing modes perpendicular to
driving direction. These opposite driving vibrations are provided by a
mechanical structure named the diamond-shaped frame. This paper presents
mechanical responses o...
#tuning fork gyroscope #anti-phase mode #mechanical response
Dynamic analysis of FG stepped truncated conical shells surrounded by Pasternak elastic foundations
Tập 42 Số 2 - Trang 133-152 - 2020
This research presents a continuous element model for solving vibration problems
of FG stepped truncated conical shells having various material properties and
surrounded by Pasternak foundations. Based on the First Order Shear Deformation
Theory (FSDT) and the equations of the FGM conical shells, the dynamic stiffness
matrix is obtained for each segment of the shell having constant thickness. The
...
#stepped shell #vibration of conical shell #functionally graded shell #continuous element method #Winkler–Pasternak foundation
Exact receptance function of a tapered AFG beam with nonlinearly varying ratios of beam properties carrying concentrated masses
Tập 45 Số 4 - Trang 296-317 - 2023
This paper presents a method for establishing the exact receptance function of a
tapered axially functionally graded (AFG) beam with nonlinear ratios of
properties using the Adomian method. In current papers, the Adomian method was
applied for linearly tapered beams where the geometric series was used
conveniently. However, for nonuniform AFG beams with nonlinearly varying ratios
of properties, th...
#receptance #frequency response function #concentrated mass #functionally graded material beam
Tuning acoustic performance of multi-chamber hybrid mufflers
Tập 43 Số 3 - Trang 209-220 - 2021
In this paper, we investigate the functional acoustic performance of
multi-chamber mufflers using a numerical approach. The wave propagation
governing in expansion chamber domains is first introduced and solved by the
finite element method. Our numerical results of selected muffler configurations
are compared with the reference predictions model and experiments in order to
validate the present pro...
#exhaust muffler #low frequency #sound transmission loss #partition #micro-perforated tube
Study on the velocity of droplet at steady state in contraction microchannels by numerical simulation
Tập 45 Số 4 - Trang 287-295 - 2023
The droplet-based microfluidic system is increasingly advancing and widely
applied in various fields of analytical techniques and experiments. To optimize
and advance this system, droplet dynamics is of utmost concern. The velocity of
droplets is highly significant as it aids in precise droplet control and
manipulation, ultimately leading to the optimization of device design and
performance. This ...
#droplet dynamics #droplet-based microfluidic #contraction microchannel #numerical simulation #velocity of droplets
Application of newly proposed hardening laws for structural steel rods
Tập 46 Số 2 - Trang 93-103 - 2024
In civil engineering, distinct mechanical properties and behaviors of structural
steel rods necessitate a novel approach to material modeling. This study extends
the application of recently proposed strain-hardening laws, originally developed
for automotive sheet metals, to several structural steel rods (CB240-T and
CB300-T). Standard uniaxial tensile tests are conducted for each examined
material...
#structure steel rods #hardening law #post-necking #finite element analysis #uniaxial tensile test