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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:
Nonlinear
dynamic analysis of large diameter pile foundations for the Bay
Bridge
Zechlin,
Erik T. (California Dep of Transportation); Chai, Jianzhong Source:
Geotechnical Special Publication, v 2, 1998, p 1223-1234
ISSN:
0895-0563 CODEN: GSPUER
Conference:
Proceedings of the 1998 Conference on Geotechnical Earthquake
Engineering and Soil Dynamics III. Part 2 (of 2), Aug 3-6 1998,
Seattle, WA, USA
Publisher:
ASCE
Abstract:
The collapse of the span at Pier E9 of the San Francisco-Oakland Bay
Bridge (SFOBB) during the 1989 Loma Prieta Earthquake was a warning
call for engineers to consider the consequences of soft soil
displacements on pile foundation design. Two new piers were proposed
as part of the seismic retrofit strategy for the 60-year-old
Cantilever truss portion of the SFOBB. From both San Andrea and
Hayward faults, the design motions at bedrock were developed for
these piers consisting of a set of response spectrum-compatible and
coherency-compatible time histories. The presence of deep soft soil
at the bridge site not only amplifies the ground motion and elongates
the period of the bridge, it also induces large soil strains which
degrade soil stiffness against piles (Idriss 1990, 1991; Dickenson et
al. 1991). A soil-foundation-structure-interaction model driven by
soil displacement time histories was established to take into account
these critical factors. Using finite element programs ADINA (Bathe
1996) and PAR (1995), dynamic models were developed to perform
seismic analyses and design for the two new piers. (18 refs.)
Keywords: Soil structure interactions -
Pile foundations - Bridge piers - Dynamic
response - Earthquake resistance - Retrofitting
- Stiffness - Finite element method -
Structural analysis - Computer
simulation Secondary Keywords: Soft soils - Software
package ADINA
Modal
approach for processing one- and three-point bend test data for
DSIF-time diagram determination. Part II - calculations and results
Rokach,
I.V. (Kielce Univ of Technology) Source: Fatigue and Fracture of
Engineering Materials & Structures, v 21, n 8, Aug, 1998, p
1015-1026
ISSN:
8756-758X CODEN: FFESEY
Publisher:
Blackwell Sci Ltd
Abstract:
In Part I of this paper, using the modal superposition method,
equations for dynamic SIF calculations are derived for an arbitrary
linear model of an impact bend specimen. In this paper (Part II),
modal parameters and other data which are necessary for the DSIF
determination have been calculated for three types of specimen model:
the Euler-Bernoulli beam model, and two- (2D) and three-dimensional
(3D) solid models. For the latter two cases, calculations were
performed using the finite element program ADINA. Results for the 2D
model of the specimen were fitted by polynomials for a wide range of
specimen geometry parameters and Poisson's ratio values. Considerable
differences were observed between the beam model parameters and the
2D or 3D ones. The differences in results for the 2D and 3D models
are small and mainly connected with non-uniformity of the SIF
distribution along the front of a through-crack in the 3D solid.
Results of processing one- and three-point bend test data reported in
the literature are presented. Numerical DSIF values are compared with
the experimental ones. (18 refs.) Keywords: Stress
intensity factors - Impact testing - Bending
strength - Fatigue of materials - Finite
element method - Mathematical models - Modal
analysis - Polynomials Secondary Keywords: Modal
superposition method
Transfer
and development of the PC version of ABAQUS program
Li,
Xiaofeng (China Inst of Atomic Energy); Zhu, Yuqiao Source:
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology, v 32, n
2, 1998, p 122-130 Language: Chinese
ISSN:
1000-6931 CODEN: YKJIEZ
Publisher:
Atomic Energy Publishing House
Abstract:
The transfer and development of the PC version of ABAQUS - a large
nonlinear mechanical finite element analysis program, are carried
out. Some special problems such as difference of the floating data
format in different computers and the computer's unusual dead halt
during the data transfer are solved and the visualized I/O capability
is added in the redevelopment. Thus, by utilizing the visual
capability, the intensity of analysis works is reduced, and the
reliability of analysis is ensured. The PC ABAQUS are tested by the
standard examples from VAX version of ABAQUS and the calculation
results are reliable. The results of calculation of stress and
deformation for CEFR shell structure with PC ABAQUS and ADINA codes
agree very well. (8 refs.) Keywords: Nuclear
materials safeguards - Nuclear fuel cladding -
Shells (structures) - Strength of materials -
Deformation - Calculations - Computer
software Secondary Keywords: Computer program transfer
- Computer program coding
Numerical
simulation of screw-on and jump-out behavior of threaded casing
connection
Qi,
Junlin (Univ of Petroleum); Luo, Weidong; Zhang, Hong; Cui, Xiaobing
Source: Shiyou Daxue Xuebao/Journal of the University of Petroleum
China, v 22, n 4, 1998, p 68-71 Language: Chinese
ISSN:
1000-5870 CODEN: SDXZE7
Publisher:
Univ Pet China
Abstract:
The mechanism of jump-out of threaded casing connection is
researched by using a finite element analysis program (ADINA).
Displacement constraint functions are applied to describe the
magnitude of overlapping and contact condition. Probing contact
condition and elastoplastic equilibrium iterations are adopted in
studying the mechanical property of threaded casing connection in
screw-on and jump-out respectively. The jump-out criterion and
maximum jump-out load are given. The conclusions are available for
engineering design of casing connection. (5 refs.)
Keywords: Oil well casings - Finite element
method - Mechanics - Computer
simulation Secondary Keywords: Threaded casing connector
- Numerical simulation
Thermal
degradation of the concrete roof of high-level waste storage tank
Stuart,
R. (ARES Corporation); Shipley, L.; Ghose, A.; Hiremath, M. Source:
Computers and Structures, v 64, n 5-6, September, 1997, p 959-972
ISSN:
0045-7949 CODEN: CMSTCJ
Publisher:
Elsevier Ltd
Abstract:
The DOE's high-level waste storage tank (HLWST) sites consist of
single- and double-shell concrete tanks covered with soil overburden.
Due to the high temperature (212°F and above) of the
liquid-filled waste, the concrete walls and domed roofs are expected
to endure thermal degradation which, in turn, may lead to cracking of
the concrete. A remote video camera inspection of one such HLWST
indicated some 'irregularities' on the inner surface of the tank
dome. A finite element model using ADINA was developed to simulate
the field conditions including concrete strength deterioration. The
model was first validated against the results obtained from tests
conducted on a 1/10th-scale model. The analysis was then extended to
study the actual field behavior. The results confirmed the overall
structural integrity of the tank by considering the global response
of the tank and a detailed analysis of likely crack patterns in the
dome area. The paper describes the complexities in validating the
scale model as well as prototype response. 1997 Elsevier
Science Ltd. (4 refs.)
Micromechanics-based
FEM simulation of fiber-reinforced cementitious composite components
Geng,
Y.P. (Inst. for Mechanics and Materials, University of California,
San Diego); Leung, C.K.Y. Source: Computers and Structures, v 64, n
5-6, September, 1997, p 973-982
ISSN:
0045-7949 CODEN: CMSTCJ
Publisher:
Elsevier Ltd
Abstract:
Fiber bridging along cracks is an important mechanism governing the
fracture toughness and the pseudo-ductility of fiber-reinforced
brittle materials and structures. This paper attempts to predict
structural behavior of fiber-reinforced cementitious composite (FRCC)
components using the finite-element procedure with
micromechanics-based constitutive modeling of the stress-displacement
relation along the crack. The tensile stress-displacement relation
along a Mode I (opening) crack is established based on fiber pullout
curves derived from a micromechanical model. A statistical model is
used to account for random fiber distribution. Two-dimensional
finite-element simulations of beam behavior are performed with the
finite-element package ADINA. Using the discrete crack approach,
strain softening truss elements are placed along the crack to
simulate the fiber bridging effect. Experiments of beams under
four-point bending are performed with specimens containing different
fiber volume fractions (up to 1.5%). The numerical results for the
load vs deformation behavior of the beams agree well with the
experimental results. The FEM procedure for micromechanics-based
design and analysis of FRCC components is therefore established.
Simulation of component behavior to identify the most cost-effective
design can, hence, be carried out. 1997 Elsevier Science
Ltd. (26 refs.)
Finite
element analysis of air-sheet interactions and flutter suppression
devices
Wang,
Xiaodong (Inst. of Paper Sci. and Technology) Source: Computers and
Structures, v 64, n 5-6, September, 1997, p 983-994
ISSN:
0045-7949 CODEN: CMSTCJ
Publisher:
Elsevier Ltd
Abstract:
A computational procedure is developed to analyze the vibration of
an axially moving web, controlled through self-acting air bearings.
The Galerkin finite element method is employed for the spatial
discretization of both the moving web and thin air layers. The
predictor-corrector method is also implemented along with the
Newton-Raphson iteration for the time integration. It is shown that
the pressurized air layers between the moving web and bearing
surfaces can significantly reduce the transverse web deflection and
provide a means of effective stabilizing. Some comparisons with
results obtained using ADINA are presented. The computational
algorithm introduced in this paper can be used to optimize both
bearing-geometry designs and spatial locations. 1997
Elsevier Science Ltd. (13 refs.)
A
strain-rate-dependent concrete material model for ADINA
Tedesco,
J.W. (Department of Civil Engineering, Auburn University); Powell,
J.C.; Ross, C. Allen; Hughes, M.L. Source: Computers and Structures,
v 64, n 5-6, September, 1997, p 1053-1067
ISSN:
0045-7949 CODEN: CMSTCJ
Publisher:
Elsevier Ltd
Abstract:
The analysis, design and/or evaluation of protective structures and
facilities for military use demands the accurate determination of
material and structural response to high-intensity, short-duration
impulse loadings. There currently exists a preponderance of data
supporting increased strength characteristics in concrete, the
primary construction material for protective facilities, at high
strain rates. This paper summarizes the modification of the nonlinear
concrete material model currently employed in the ADINA
finite-element computer programs to account for high strain rate
effects. The resultant strain-rate-dependent concrete material model
encompasses the strain-rate range from 10-7s-1
(quasi-static) to 103s-1,
in both compression and tension. 1997 Elsevier Science
Ltd. (30 refs.)
Finite-element
analysis of a rotary oven for bread
Colla,
M. (Department of Industrial Engineering, University of Parma);
Rainieri, S.; Pagliarini, G. Source: Computers and Structures, v 64,
n 5-6, September, 1997, p 1097-1112
ISSN:
0045-7949 CODEN: CMSTCJ
Publisher:
Elsevier Ltd
Abstract:
The paper deals with a finite-element analysis of the turbulent
forced-convection air flow inside a rotary oven for bread. The code
ADINA-F is used for the numerical finite-element simulation. To
describe the flow and the heat transfer inside the oven, a
two-dimensional model has been adopted. The numerical heat-transfer
convection coefficient is in good agreement with the experimental
data thus providing a validation of the approximate model formulated
in the numerical analysis. A structural change intended to enhance
the convective heat transfer has been suggested and numerically
tested. The results show a mean Nusselt number enhancement of about
30%. The finite-element analysis is, therefore, a helpful tool in
estimating the performances of this kind of oven. 1997
Elsevier Science Ltd. (5 refs.)
Structural
analysis of Francis turbine runners using ADINA
Wickstrom,
A. (Kvaerner Energy) Source: Computers and Structures, v 64, n 5-6,
September, 1997, p 1087-1095
ISSN:
0045-7949 CODEN: CMSTCJ
Publisher:
Elsevier Ltd
Abstract:
ADINA is used as the primary design tool in the structural analysis
of Francis turbine runners at Kvaerner Energy. An in-house developed
finite-element mesh generator is used for quick and efficient
modelling of any runner or runner vane segment in THREEDSOLID
elements. The finite-element analyses include frequency analyses in
order to avoid structural amplification of dynamic loads and
static-strength analyses in order to obtain a uniform stress
distribution in the runner. Comparison of the convergence has been
carried out with respect to mesh density and order of the elements.
The high-order elements (20- and 27-nodes) compute both smaller
displacements and lower natural frequencies in comparison to
eight-node elements. For stress calculations, only high-order
elements are used. Poor structural design is one explanation of
failures in some runners. Knowledge of structural performance secures
structural integrity and reveals the potential for reducing weight.
1997 Elsevier Science Ltd. (3 refs.)
Modelling
the behaviour of a control-element blade during irradiation
Massih,
A.R. (Lulea University of Technology); Isaksson, P.; Stahle, P.
Source: Computers and Structures, v 64, n 5-6, September, 1997, p
1113-1127
ISSN:
0045-7949 CODEN: CMSTCJ
Publisher:
Elsevier Ltd
Abstract:
The control-rod elements in a boiling-water reactor contain natural
boron carbide (B4C) powder, used as
neutron-absorber material and clad in stainless-steel blades. During
in-reactor service, the internal production of helium gas and point
defects in neutron-irradiated boron carbide cause swelling which can
induce significant contact stresses in the blade causing, eventually,
stress-corrosion cracking of the blades. In this work, a
finite-element analysis of a control-rod blade consisting of
B4C powder and stainless-steel
cladding has been performed using ADINA. An algorithm for the
finite-element calculation of a porous material such as
B4C powder has been developed and
which models both swelling and consolidation behaviour of
B4C powder. The Drucker-Prager
constitutive law has been used to model the consolidation effect. The
model has been verified with an analytical solution for a simple
geometry. A number of cases with B4C
powder in contact with stainless steel and using the actual blade
design have been studied for which contact stresses, the
displacements and the effective stresses are calculated. Finally, the
model has been used to predict the deformation of the blade during
irradiation under B4C swelling and
irradiation-induced creep of stainless steel. 1997
Published by Elsevier Science Ltd. (9 refs.)
Simulation
of the aquaplane problem
Zmindak,
M. (Univ. of Transp. and Communications, Faculty of Mechanical
Engineering, Dept. Mechanics and Strength of Mat.); Grajciar, I.
Source: Computers and Structures, v 64, n 5-6, September, 1997, p
1155-1164
ISSN:
0045-7949 CODEN: CMSTCJ
Publisher:
Elsevier Ltd
Abstract:
Finite-element analysis (FEA) has been widely integrated into the
tire design process as a useful numerical tool for the investigation
of various behavioural conditions of tires during their service life.
Recently, much interest has been directed towards the contact of a
tire with a water layer together with steering and braking capability
(especially for the landing of airplanes). In this paper, we present
several possibilities for the modeling of aquaplane problems with the
ADINA system. The solution results, which relate to the character of
fluid-flow pressure distribution and lift forces obtained by the
steady-state analysis, yield important information for tire design.
The water under the tire is considered to be an isothermal
incompressible fluid and the tire structure is considered a
deformable body. 1997 Elsevier Science Ltd. (16 refs.)
Nonlinear
finite-element analysis of concrete dowels
Kraus,
D. (Univ. Ger. Armed Forces Munich, Department of Structural
Engineering); Wurzer, O. Source: Computers and Structures, v 64, n
5-6, September, 1997, p 1271-1279
ISSN:
0045-7949 CODEN: CMSTCJ
Publisher:
Elsevier Ltd
Abstract:
Numerical studies used to investigate the bearing and deformation
behavior of a new shear connector called 'concrete dowel', are
presented. In performing the nonlinear analyses, the ADINA
finite-element computer code was used. The validity of the
finite-element model is shown by comparison with results of
experimental tests. 1997 Elsevier Science Ltd. (8 refs.)
Prediction
of thermoplastic failure of a reactor pressure vessel under a
postulated core melt accident
Duijvestijn,
G. (Lab. Safety and Accident Res. (LSU), Paul Scherrer Institute);
Birchley, J.; Reichlin, K. Source: Computers and Structures, v 64, n
5-6, September, 1997, p 1239-1249
ISSN:
0045-7949 CODEN: CMSTCJ
Publisher:
Elsevier Ltd
Abstract:
This paper presents the lower-head failure calculations performed
for a postulated accident scenario in a commercial nuclear power
plant. A postulated 1 inch break in the primary coolant circuit leads
to dry-out and subsequent meltdown of the core. The reference plant
is a pressurized-water reactor without penetrations in the reactor
vessel lower head. The molten core material accumulates in the lower
head, eventually causing failure of the vessel. The analysis
investigates flow conditions in the melt pool, temperature evolution
in the reactor vessel wall and structure mechanical evaluation of the
vessel under strong thermal loads and a range of internal pressures.
The calculations were performed using the ADINA finite-element codes.
The analysis focusses on the failure processes, and time and mode of
failure. The most likely mode of failure at low pressure is global
rupture due to gradual accumulation of creep strain over a large part
of the heated area. In contrast, thermoplasticity becomes important
at high pressure or following a pressure spike and can lead to
earlier local failure. In situations in which part of the heat load
is concentrated over a small area, resulting in a hot spot, local
failure occurs, but not until the temperatures are close to the
melting point. At low pressure in particular, the hot spot area
remains intact until the structure is molten across more than half of
the thickness. 1997 Elsevier Science Ltd. (16 refs.)
Large-deformation
analysis of nonlinear elastic fluids
Prost-Domasky,
S.A. (Department of Mechanical Engineering, Washington University);
Szabo, B.A.; Zahalak, G.I. Source: Computers and Structures, v 64, n
5-6, September, 1997, p 1281-1290
ISSN:
0045-7949 CODEN: CMSTCJ
Publisher:
Elsevier Ltd
Abstract:
A computational analysis was undertaken of four nonlinear
generalizations of the simple Maxwell viscoelastic fluid under
conditions of large deformations. The four fluids are named the upper
convected Maxwell, lower convected Maxwell, Jaumann and
Dong-Skalak-Sung fluids. Each of them is characterized by two
material parameters, a shear modulus and a time constant and each
reduces to the simple Maxwell fluid in the case of small, slow
deformations. The finite element program ADINA was adapted to compute
the mechanical responses of these materials to imposed surface
displacements of various types. Our algorithm was based on the
equality (for an incompressible material) of the components of the
second Piola-Kirchhoff stress with respect to material coordinates
and those of the Cauchy stress with respect to convected coordinates.
After evaluating the algorithm's accuracy with respect to a limited
set of available analytic solutions, the responses to indentation by
a rigid, sharp-edged cylinder of a half-space composed of each of the
four nonlinear fluids were computed. These calculations included a
wide range of indentation speeds, covering the spectrum of material
behavior from viscous fluid to hyperelastic solid. The computations
admitted large indentations - up to six indenter radii in special
cases. In contrast to their radically different behaviors when
subjected to large homogeneous deformations, all four materials
exhibited similar behaviors when subjected to deep indentations. For
any specific choice of material and computational parameters, the
computation terminated if the indentation became too deep and the
magnitude of this maximum achievable indentation depth decreased with
increasing mesh refinement. 1997 Elsevier Science Ltd. (12
refs.)
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