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...
Forming limit prediction of advanced high-strength steels (AHSS) using an enhanced ductile damage model
Tập 47 Số 2 - Trang 142-153 - 2025
This paper presents prediction of forming limits of Advanced High-Strength
Steels (AHSS) DP980 by adopting an enhanced ductile damage model to consider
sheet metal anisotropy. The micro-void growth-based original damage model is
transformed from principal stress space (σ1, σ2, σ3) into the equivalent stress,
Lode parameter, and stress triaxiality space (σe, Lp, η). The proposed ductile
fracture pr...
#ductile fracture #forming limit diagram #AHSS steel #ductile damage model
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
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
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
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
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
The stability of flow with suspended sediment in an inclined channel of movable bed
Tập 13 Số 2 - Trang 8-14 - 1991
In this work the author has studied the stability of flow with suspended
sediment in an inclined channel of movable bed at different stages of flow. The
obtained result shows that when the flow with suspended sediment is at the stage
of deposition or erosion then the critical inclined angle is less than that one
of homogeneous flow, e. g., the flow with suspended sediment is earlier
unstable. If t...