Page 8
Following are some publications with reference to the use of ADINA. The pages give the Abstracts of some papers published since 1986 referring to ADINA. The most recent papers are listed first. All these papers may be searched using the box:
Self-strengthening
research of fiber reinforced pressure vessel with metallic liners
Wang,
X. (Department of Engineering Mechanics, School of Civil Eng. and
Mechanics, Shanghai Jiaotong University); Li, M.D.; Yu, Z.Y. Source:
Journal of Reinforced Plastics and Composites, v 20, n 16, 2001, p
1390-1413
ISSN:
0731-6844 CODEN: JRPCDW
Publisher:
SAGE Publications Ltd
Abstract:
On the basis of an elasto-plastic analytical solution for laminating
structure, making use of automatic dynamic increment nonlinear finite
element analysis software ADINA [1], the self-strengthening research
of a FRP (fiber reinforced pressure) vessel with metallic liner is
presented in this paper. A self-strengthening pressure is determined
to make the aluminum inner layer elastic deformation under
hydrostatic pressure and to obtain the best ratio of the vessel's
volume and weight. Thus, the gas-tightness and fatigue strength of
FRP vessel were improved. In addition, the influence of thermal load
on the vessel was also calculated. Keywords: Pressure
vessels - Fiber reinforced materials - Laminates
- Elasticity - Plasticity - Pressure
effects - Deformation - Hydrostatic pressure
- Thermal load - Fatigue of materials -
Finite element method Secondary Keywords: Metallic
liners
Analysis
of thermoelastic hydrodynamic lubrication performance of thrust
bearing for large hydroelectric generator
Wu,
Z.D. (Dep. of Elect. Mach., Harbin Inst. of Large Electr. Mach.);
Wang, L.Q.; Qu, D.Z.; Qi, Y.L. Source: Mocaxue Xuebao/Tribology, v
21, n 2, March, 2001, p 147-150 Language: Chinese
ISSN:
1004-0595 CODEN: MAXUE7
Publisher:
Science Press
Abstract:
The thermoelastic-hydrodynamic lubrication performance of the thrust
bearing with Babbitt layer and/or teflon layer of large hydroelectric
generator was investigated by finite element analysis. The physical
model takes the lubricating oil film, thrust bearing and runner and
thrust head into account . The thermoelastic deformation of the
thrust bearing and runner and thrust head was analyzed by using ADINA
(T) program. It was found that the calculating results of the thrust
bearings conform well to the measuring values.
Keywords: Thrust bearings - Hydroelectric
generators - Elastohydrodynamic lubrication -
Deformation - Finite element method
Secondary Keywords: Thermoelastic hydrodynamic lubrication -
Thermoelastic deformation
Dynamic
response analysis of fuel assembly with channel for nuclear heating
reactor during seismic loading
Ju,
Dezhong (Inst. of Nuclear Energy Technol., Tsinghua Univ.); Xu, Yong;
Wang, Jiachun Source: Qinghua Daxue Xuebao/Journal of Tsinghua
University, v 40, n 11, November, 2000, p 75-78 Language: Chinese
ISSN:
1000-0054 CODEN: QDXKE8
Publisher:
Press of Tsinghua University
Abstract:
The dynamic response of the fuel assembly and fuel channel
interaction during a seismic event is analyzed to study the
structural characteristics of the reactor fuel assembly as part of
the Daqing NHR-200 project. The finite element program for automatic
dynamic increment nonlinear analysis (ADINA) is used to predict the
non linear dynamic response due to collisions between the fuel
assembly and the fuel channel during seismic events. The results are
used to analyze factors affecting the dynamic response, such as
boundary support conditions and changes of the main model parameters.
Curves are presented for the forces and frame displacements following
the seismic excitation. The results verify the structural integrity
of the fuel assembly including the channel in the NHR-200 design when
subjected to seismic loading and verify that the cruciform control
rod can still be inserted. (3 refs.) Keywords: Nuclear
reactors - Heating - Nuclear fuel elements
- Control nonlinearities - Dynamic response -
Finite element method Secondary Keywords: Nuclear
heating reactors - Dynamic response
analysis
Meso/micro-mechanical
model for damage progression in glass-fiber/epoxy cross-ply laminates
by finite-element analysis
Xia,
Zihui (Univ of Alberta); Chen, Yu; Ellyin, Fernand Source: Composites
Science and Technology, v 60, n 8, Jun, 2000, p 1171-1179
ISSN:
0266-3538 CODEN: CSTCEH
Publisher:
Elsevier Science Ltd
Abstract:
A three-dimensional multi-cell meso/micro-mechanical finite-element
model has been developed for the prediction of the overall mechanical
behavior of a glass-fiber/epoxy laminate, and for the study of damage mechanisms in
fiber-reinforced polymer laminates. The epoxy matrix is represented
by a non-linear viscoelastic constitutive model, which was
incorporated into the finite-element analysis code, ADINA, through
the user-defined subroutine. In addition, a damage criterion for the
epoxy matrix is introduced into the finite-element model. Numerical
results from the finite-element analysis are compared with
experimental data, and it is found that both the predicted overall
stress/strain response and the prediction of the initiation and
propagation of the damage are in good agreement with the experimental
results. (23 refs.)
Keywords: Glass fiber
reinforced plastics - Laminated composites -
Nonmetallic matrix composites - Epoxy resins
- Composite micromechanics - Mathematical models
- Finite element method - Viscoelasticity -
Stress analysis - Strain measurement - Crack
initiation - Crack propagation - Computer
simulation Secondary Keywords: Mesomechanical model -
Viscoelastic constitutive model - Fiber reinforced
cross-ply laminates - Damage simulation
Validity
of one-dimensional experimental principle for flat specimen in
bar-bar tensile impact apparatus
Wang,
C.Y. (Univ of Science and Technology of China); Xia, Y.M. Source:
International Journal of Solids and Structures, v 37, n 24, Mar,
2000, p 3305-3322
ISSN:
0020-7683 CODEN: IJSOAD
Publisher:
Elsevier Science Ltd
Abstract:
The Bar-bar Tensile Impact Apparatus (BTIA) is widely used to
measure the dynamic tensile properties of solid materials. In the
present paper, a simplified three-dimensional finite element model
for the BTIA system with a flat specimen is established to simulate
the experimental process of a BTIA. The numerical solution for the
model is solved by ADINA. In the scope of elastoplastic theory, the
numerical analysis confirms the validity of the one-dimensional
experimental principle used in the BTIA, as long as certain
foundations are satisfied. (15 refs.) Keywords: Tensile
testing - Structural analysis - Finite
element method - Mathematical models -
Elastoplasticity - Stress analysis
Secondary Keywords: Bar-bar tensile impact apparatus
(BTIA)
Nonlinear
finite element analysis for the ultimate strength of multiplannar
tubular joint
He,
Dongzhe (Tsinghua Univ); Wang, Yuanqing; Li, Shaofu Source: Gong
Cheng Li Xue/Engineering Mechanics, v 17, n 4, Aug, 2000, p 50-55
Language: Chinese
ISSN:
1000-4750 CODEN: GOLIEB
Publisher:
Tsinghua University
Abstract:
A four-node general quadrilateral shell element for geometric and
materials non-linear analysis was employed in the modeling of tubular
joint, an automatic incremental algorithm was adopted in the solution
of nonlinear finite element equations. Based on the ADINA code, the
preprocessing and post-processing programs were developed, which
reduced the computational cost of the ultimate strength of
multiplannar tubular joints including joints between circular hollow
sections, joints between square hollow sections and circular hollow
sections. Numerical results were compared with the experimental
results. Good agreement is achieved. (6 refs.)
Keywords: Joints (structural components) - Finite
element method - Shells (structures) - Nonlinear
equations Secondary Keywords: Tubular joint - Four
node shell element - Automatic incremental algorithm
- Ultimate strength - ADINA program
Three-dimensional
analysis of bar-bar tensile impact testing apparatus with a flat
specimen by elastoplastic FEM
Congyue,
Wang (Univ of Science and Technology of China); Yuanming, Xia Source:
Ying Yong Li Xue Xue Bao/Chinese Journal of Applied Mechanics, v 17,
n 1, Mar, 2000, p 121-126 Language: Chinese
ISSN:
1000-4939 CODEN: YLXUFD
Publisher:
Xi'an Jiaotong Univ
Abstract:
In relation to reference, a three-dimensional finite element model
for the SHTB is established to simulate the Bar-Bar Tensile Impact
Testing Apparatus with a Flat Specimen. Using the finite element
program ADINA, the first comprehensive 3-D numerical solution for the
model is obtained. Numerical simulations indicate that, so long as
certain conditions be satisfied, the 1-D experimental principle
adopted in analyzing the experimental data can be confirmed. These
conditions make it necessary to appropriately select the geometry of
the specimen. Compared with the simulational experimental results
for the SHTB with a dumbbell-like cylindrical specimen, this SHTB
with a dumbbell-like flat specimen is more reliable and reasonable.
3-D
computational fluid dynamics in artificial lung design: steady and
transient models
Chambers,
S.D. (Michigan Critical Care Consultants, Inc); Bartlett, R.H.;
Montoya, J.P. Source: ASAIO Journal, v 46, n 2, Mar-Apr, 2000, p 231
ISSN:
1058-2916 CODEN: ASATEJ
Conference:
46th Annual Conference and Exposition of ASAIO, Jun 28-Jul 1 2000,
New York, NY, USA
Publisher:
Lippincott-Raven Publ
Abstract:
A 3-D Computational Fluid Dynamic (CFD) model of a previously
described total artificial lung (TAL) was developed. The model was
developed to optimize the TAL design based on three parameters: flow
distribution, pressure drop (ΔP), and lung impedance in
pulsatile flow. METHODS: ADINA (ADINA R&D, Inc., Watertown,
MA), a finite-element based package, was used in this work. The
fiber bundle was assumed to be a porous medium, and thus, modeled
using Darcy's equations. The porosity (φ=0.5) was calculated
from the fiber geometry and spacing, and the permeability
(k=7.4e-9m2)
was measured experimentally. For this preliminary work, the fluid
was water (ρ=1000 kg/m3,
μ=0.001 Ns/m2). For
steady-state flow, ΔP was prescribed as the boundary
condition. For transient flow, physiologic inlet and outlet
pressures were prescribed as functions of time. RESULTS: For the
initial TAL design, the calculated steady-state flow rate (Q) vs.
ΔP was within 5-20% of the measured Q up to 10 l/min.
Several design alterations were studied, and the CFD results trended
with the measured Q vs. ΔP. For the transient model, the
calculated Q(t) was within 10-15% of that measured. CONCLUSIONS:
These preliminary results suggest that CFD will be a useful tool in
hemodynamic optimization of the TAL. Also, the transient model will
allow for the TAL impedance to be optimized, while minimizing the
need for trial and error device prototyping.
Keywords: Artificial organs - Computational fluid
dynamics - Pulsatile flow - Mathematical
models - Physiology - Hemodynamics -
Optimization - Computer aided design
Secondary Keywords: Artificial lung - Flow distribution
- Lung impedance
Dynamic
elastic buckling of a slender beam with geometric imperfections
subject to an axial impulse
Kenny,
S. (Dalhousie Univ); Pegg, N.; Taheri, F. Source: Finite Elements in
Analysis and Design, v 35, n 3, Jun, 2000, p 227-246
ISSN:
0168-874X CODEN: FEADEU
Publisher:
Elsevier Science B.V.
Abstract:
Results from a numerical investigation of the dynamic buckling of an
elastic slender beam, with initial geometric imperfections, subjected
to an intense axial impulse are presented. The pulse buckling
response was numerically modelled via the finite difference and
finite element methods. Three commercially available software
packages were utilized during the investigations: ADINA (Users
Manual, ADINA R&D, Inc., 71 Elton Avenue, Watertown, MA,
02172, USA, September 1990 (http://world.std.com to approximately
adina/).) ANSYS (Users Manual, Ver. 5.3, Troy Technology Park, 1960
Ring Drive, Troy, MI, 48083, USA, SAS IP Inc., 1997
(http://www.ansys.com).) and NISA (Users Manual, Ver. 7, Engineering
Mechanics Research Corporation, P.O. box 696, Troy, MI 48099, USA,
1997 (http://www.emrc.com).). The analysis demonstrated that only
random geometric imperfections would initiate the characteristic
exponential growth of transverse buckling displacements. Accurate
modelling of the peak buckling amplitude and modal response required
aspect ratios in the order of 1:1. The finite difference models were
consistent with theory. The performance of quadratic, plane strain
finite element models was superior to that using beam elements. This
was related to the inherent curvature restrictions defined through
the Euler-Bernoulli beam element formulation. A buckling criterion
based on critical load intensity was investigated. Details on the
numerical models, computations and analyses are presented. (19
refs.) Keywords: Beams and girders -
Buckling - Elasticity - Finite element
method - Finite difference method - Dynamic
response - Computer aided design - Computational
geometry - Computer simulation - Mathematical
models - Failure analysis Secondary Keywords: Geometric
imperfections - Software package ANSYS - Software
package ADINA
Nonlinear
finite element analysis for the ultimate strength of multiplannar
tubular joint
He,
Dong-zhe (Tsinghua Univ); Wang, Yuan-qing; Li, Shao-fu Source: Gong
Cheng Li Xue/Engineering Mechanics, v 17, n 4, Aug, 2000, p 50-55
Language: Chinese
ISSN:
1000-4750 CODEN: GOLIEB
Publisher:
Tsinghua University
Abstract:
A four-node general quadrilateral shell element for geometric and
material non-linear analysis is employed in the modeling of tubular
joint, an automatic incremental algorithm is adopted in the solution
of nonlinear finite element equations. Based on the ADINA code, the
preprocessing and post-processing programs are developed, which
reduce the computational cost of the ultimate strength of
multiplannar tubular joints including joints between circular hollow
sections, joints between square hollow sections and circular hollow
sections. Numerical results are compared with to the experimental
results. Good agreement is achieved. (6 refs.)
Keywords: Joints (structural components) - Structural
analysis - Strength of materials - Mathematical
models - Finite element method - Algorithms
- Computer aided analysis Secondary Keywords: Ultimate
strength - Software package ADINA
A
two-dimensional axisymmetric numerical analysis of a bar-bar tensile
impact apparatus by elastoplastic FEM
Wang,
C.Y. (Department of Modern Mechanics, Univ. of Sci. and Technol. of
China); Wan, H.P.; Xia, Y.M. Source: Journal of Sound and Vibration,
v 220, n 5, Mar 11, 1999, p 787-806
ISSN:
0022-460X CODEN: JSVIAG
Publisher:
Academic Press
Abstract:
At present, a bar-bar Tensile Impact Apparatus (BTIA) is widely used
to measure the dynamic tensile properties of solid materials. A BTIA
consists of two long bars, between which a specimen is connected.
Hence, there are several physical and geometric discontinuous
sections in a BTIA. In the present paper, a two-dimensional
axisymmetric elastoplastic finite element model for a BTIA with a
dumb bell-shaped cylindrical specimen is established. The numerical
solution for the model is solved by ADINA. In the scope of
elastoplastic theory, the numerical analysis confirms the validity of
the 1D experimental measuring principle of BTIA, so long as certain
foundations are satisfied. The effects of the specimen geometry and
strain rate are also discussed. The matching relation between the
specimen and the BTIA system has been studied. (11 refs.)
Two-Dimensional
Axisymmetric Analysis of Bar-Bar Tensile Impact Testing Apparatus by
Elastoplastic FEM
Congyue,
Wang; Yuanming, Xia Source: Ying Yong Li Xue Xue Bao/Chinese Journal
of Applied Mechanics, v 16, n 1, 1999, p 65-73 Language: Chinese
ISSN:
1000-4939 CODEN: YLXUFD
Publisher:
Xi'an Jiaotong University
Abstract:
At present, a bar-bar tensile impact apparatus (SHTB) is widely used
to measure the dynamic tensile properties of solid materials. SHTB
consists of two long elastic bars, between which a specimen is
glue-connected. Hence, there are several physical and geometric
discontinuous sections in SHTB. In the present paper, the results of
the first comprehensive two-dimensional (2D) numerical analysis of
SHTB are obtained. A 2D axisymmetric elastoplastic finite element
model for SHTB is established. The numerical solution for the model
is solved by the dynamic incremental non-linear finite element
program (ADINA). The numerical results show the rule of the stress
wave propagation is SHTB and quantitatively describe the effects of
variations in both the specimen geometry and the different
strain-rate on the validity of the assumptions used in analyzing
experimental data. In the scope of elastoplastic theory, the
numerical analysis for SHTB shows that the validity of ID
experimental measuring principle can also definitely be found out.
Furthermore, the matching relation between the specimen and the SHTB
system is discussed. (12 refs.)
Computational
simulation of turbulent mixing with mass transfer
Wang,
Xiaodong (Georgia Inst of Technology); Feng, Zhigang; Forney, Larry
J. Source: Computers and Structures, v 70, n 4, Feb, 1999, p 447-465
ISSN:
0045-7949 CODEN: CMSTCJ
Publisher:
Elsevier Sci Ltd
Abstract:
In this paper, we present a series of computational simulations of
three-dimensional turbulent mixing with mass transfer for various
pipe mixing arrangements. The simulations are carried out with the
ADINA software, in which general-purpose finite element and finite
volume formulations along with the k-ε turbulent model
are used for incompressible Navier-Stokes flows with mass transfer.
Based on the predicted pressure and velocity profiles and the
standard deviation of tracer (or fiber) spatial distributions at
certain distances downstream from the injection point, we compare the
mixing performances of various transverse, concentric, and multijet
mixers as well as four silo mixing units. In addition, we deduce
certain design information pertaining to different mixing
configurations. (14 refs.) Keywords: Mixing
- Mixers (machinery) - Jets - Turbulent
flow - Mass transfer - Pipe - Computer
simulation - Computer software - Finite
element method - Finite volume method -
Mathematical models - Machine design -
Incompressible flow Secondary Keywords: Software
package ADINA - Turbulent mixing - Navier-Stokes
flows
Fatigue
testing of double-angle connections of steel railroad bridges
Abouelmaaty,
Waled (Univ of Nevada-Reno); Maragakis, Emmanuel; Itani, Ahmad;
Douglas, Bruce Source: Transportation Research Record, n 1688, Nov,
1999, p 46-52
ISSN:
0361-1981 CODEN: TRREDM
Publisher:
National Research Council
Abstract:
An experimental study to evaluate the fatigue strength of
double-angle connections used to connect stringers to floor beams in
steel railroad bridges is described. The tests examined connections
that could be used for either new construction or replacement of old,
damaged connections. Double-angle connections are always assumed to
be subjected only to shear stresses. But, in reality, some bending
moment also is developed by this type of connection, causing
additional flexural stresses, which, in turn, can produce fatigue
damage by exceeding the constant amplitude fatigue limit. The amount
of the transferred moment was estimated in the tests. Two full-scale
specimens were built, representing the stringer-to-floor beam
connection of a one-span, open-deck, through-plate girder bridge
located in Nevada, typical of construction in the early 1900s. The
specimens were tested under a cyclic loading of ± 195.8 kN,
representing the equivalent load, which produces a total maximum
shear reaction at the connection equal to the one produced in the
actual bridge. However, the load cycles were from 0 to 391.6 kN in
real bridges. The specimens also were tested beyond the fatigue
initiation to observe the crack-propagation patterns and their growth
rate. The tested specimens were modeled by the finite element
program ADINA, and a comparison between the analytical and
experimental results was made. (12 refs.)
Keywords: Railroad bridges - Steel bridges
- Fatigue testing - Connectors (structural) -
Structural analysis - Strength of materials -
Fatigue of materials - Shear stress -
Bending moments - Numerical methods - Cyclic
loads - Crack propagation - Finite element
method Secondary Keywords: Double angle connections -
Steel railroad bridges - Flexural stresses -
Fatigue damage
Seismic
analysis of a fire loop piping system
Crawford,
J.E. (Karegozian & Case Structural Engineers); Constantino,
C.J.; Goen, L.K.; Volkman, D. Source: American Society of Mechanical
Engineers, Pressure Vessels and Piping Division (Publication) PVP, v
387, 1999, p 249-254
ISSN:
0277-027X CODEN: AMPPD5
Conference:
Seismic Engineering - 1999 (The ASME Pressure Vessels and Piping
Conference), Aug 1-Aug 5 1999, Boston, MA, USA Sponsor: ASME
Publisher:
American Society of Mechanical Engineers
Abstract:
This paper summarizes the studies conducted to assess the seismic
capability of a fire loop piping system that is being installed at
the Los Alamos National Laboratory (LANL) to serve a series of
critical facilities. The approach used in the evaluation was to
develop a complete finite element model of the entire fire loop
piping system and its appurtenances extent to the structures being
protected. The seismic loading was input to this system in the form
of specified accelerograms selected to match given response spectral
criteria. The system responses were then computed using the ADINA
nonlinear finite element program, incorporating several nonlinear
aspects relating to pipe-soil interaction and pipe bending. A series
of calculations were performed to assess the effects of direction of
the seismic input, potential variability in site parameters as well
as materials of the piping system. Calculations of response were
performed for both ductile iron (DI) and high-density polyethylene
(HDPE) pipe. (12 refs.) Keywords: Water piping
systems - Earthquake resistance - Structural
analysis - Structural loads - Computer
simulation - Mathematical models - Finite
element method - Computer software - Soil
structure interactions - Bending (deformation) -
Nodular iron - Plastic pipe - High
density polyethylenes Secondary Keywords: Fire loop piping
systems - Accelerograms - Response spectral
criteria - Software package ADINA
Page 8
|
