ADroppedObjectTestusingWorkbenchLS‐DYNA
IntroductiontoApplicationCustomizationToolkit(ACT)
ACT (Application Customization Toolkit) is a full featured scripting interface to customize applications
in workbench. ACT provides the internal mechanisms that allow users to customize an Ansys
workbench application without compiling external code or linking with existing libraries.
ACT will allow you to add custom features to the mechanical interface that are specific to your
industry or even one particular model. These applications are called “extensions” by ANSYS.
Among different ACT Extensions, the Workbench LS‐DYNA is an ACT extension which provides an
interactive access to LS‐DYNA with the full access to Ansys workbench tools. All pre‐post and post‐
processing are set up inside the workbench environment. The main advantages for Workbench LS‐
DYNA user are listed below:
‐ Easy to learn and use mechanical GUI
‐ Bi‐directional access to all CAD
‐ Powerful “explicit smart” meshing
‐ One click update for modified CAD
‐ Parameter optimization
‐ One click report generation
‐ No K. file modification required
The Workbench LS‐DYNA is available to all users with an Ansys LS‐DYNA, Ansys LS‐DYNA PC and /or
Ansys LS‐DYNA prepost license. It is an ACT Extension, available from the Ansys customer portal. The
extension is less than 2 MB and can be installed in less than 5 minutes. Currently, Workbench LS‐
DYNA is available for 64 bit windows 7 and XP. Workbench LS‐DYNA is going to be developed for
Linux by the end of a year. Workbench LS‐DYNA is now available to download from Ansys customer
portal as illustrated in Figure 1.
Downlo
Figure 1: A
StartWIn Ansys
then inst
Extensio
Figure 2:
oadWorkb
Ansys extensio
Workbench 14.5 workbe
tall extensio
on
Install Workbe
benchLS‐D
n library
hLS‐DYNAench, “Exten
n to browse
ench LS‐DYNA e
DYNAExte
AExtensinsion” is add
to the file “L
extension
ension
ioned into the p
LS‐DYNA.We
pull‐down m
ebex” and ins
enu. Click on
stall Workbe
n “Extension
ench LS‐DYNA
” and
A
Figure 3: M
CreateThere ar
‐
‐ O
Figure 4: W
Manage LS‐DYN
eaWorkbre two ways t
Drag and dro
Or double cl
Workbench LS‐
NA extension
benchLS‐Dto create the
op Workben
ick on Work
DYNA extensio
DYNAproe project:
ch LS‐DYNA
bench LS‐DY
on
oject
system to Pr
YNA system
roject Schemmatic
In the fo
verify th
It is esse
critical c
A metho
following
DEMO
In Engine
Figure 5: N
Insert th
object.
ollowing exam
e capability
ential to kno
hanges in th
od of setting
g. The result
:ModelS
eering Data,
Nonlinear mate
he geometry
mple a cylind
of the struct
ow if the stru
he shape and
a dynamic a
ts afterwards
etupinW
choose a no
erial (structura
file into the
der is droppe
ture against a
cture can wi
strength of
nalysis in Wo
s are compar
Workbench
onlinear mat
l steel NL)
Design Mod
ed onto a pla
a dropped o
ithstand the
the structur
orkbench LS
red with a m
hLS‐DYNA
erial (structu
deler, consist
ate. The over
bject with sp
impact (with
re.
‐DYNA Exten
more tradition
AExtensi
ural steel NL)
ting of a Plat
rall aim of su
pecific impac
h a specific e
nsion is demo
nal static ana
ion
)
e and a cylin
uch an analys
ct energy.
energy) with
onstrated in
alysis.
ndrical dropp
sis is to
out any
the
ped
OverviThe pre
Figure 6: A
iewoftheand post pro
Available pre a
eExtensioocessors too
nd post toolba
onToolbalbar of the e
r for Workbenc
arextension are
ch LS‐DYNA ext
Pre‐process
Part:
‐ Sec
‐ Hou
‐ Def
Constraints
‐ Incl
Post‐proces
‐ ASC
The toolbar
future.
e explained in
tension
sing toolbar:
tion propert
urglass Contr
fine Airbag (
:
ude more co
ssing:
CII output plo
r will be com
n the followi
:
ties (element
rol
not available
ontact defini
ot
pleted with
ing figure:
t formulation
e in V 14.5)
itions and co
more option
ns)
onstraints
ns in
Complet
Figure 7: A
te the definit
Analysis setting
tion of the ge
LS‐D
g for Workbenc
eometry in t
DYNA Exten
ch LS‐DYNA ext
the same wa
nsion Analys
tension
Ste
M
Da
Ho
Ou
y of the stat
sis Setting
ep control:
End tim
emory mana
‐ Memo
‐ Numb
amping Cont
‐ Specify
ourglass con
‐ Specify
utput contro
‐ Stress
‐ Strain
‐ Plastic
ic analysis:
me
agement:
ory allocation
er of CPU
trol:
y global dam
trol:
y global hou
ol:
c strain
n
mping
rglass contro
ol
Model
Initial co
‐ X
‐ Y
‐ Z
lSetupon
ondition (righ
X componen
Y componen
Z componen
Figure 8: Initia
ntheplate
ht click on ini
nt: 0 m/s
nt: 18,01m/s
nt: 0 m/s
al condition fo
eandthe
itial conditio
s
r the dropped o
dropped
on to insert v
object
object
velocity and sscope it to cy
ylinder)
Right clic
plate. Lis
‐ Fixed
‐ Elast
‐ Nod
‐ Nod
‐ Tem
‐ Conv
‐ Heat
‐ Radi
Figure 9: A
ck on Analys
st of the bou
d rotation
tic support
al force
al displacem
mperature
vection
t flux
iation
Available boun
is setting to
undary condi
ment
dary condition
Not ava
in V 14.
apply fixed s
tions in Wor
s in Workbenc
ailable
.5
Availab
V 14.5
support bou
rkbench LS‐D
h LS‐DYNA exte
ble in
ndary condit
DYNA Extens
ension
tion to the fo
ion is:
our edges of
the
Postp
Save the
SolverOSolver o
‐
‐
‐ W
‐
‐ T
‐ T
Figure 10:
rocessing
e project. Clic
Outpututput under
LS‐DYNA ver
Initialization
Warning Me
Error Messag
Time step siz
Timing infor
Solver output
gofWork
ck on “Solve”
the solution
rsion numbe
details
essages
ges
ze and other
mation
kbenchLS
” and run the
n Information
r and your sy
r cycle detail
‐DYNAEx
e simulation
n consists of
ystem inform
s
xtension
.
the followin
mation
ng informatioon:
Right clic
Figure 11:
Figure 12:
ck on “Soluti
Deformation r
Directional de
ion” and inse
results in LS‐DY
eformation of t
ert “Deforma
YNA extension
the dropped ob
ation”, “Tota
bject
al” and “Directional”
Figure 13:
Figure 14:
Total deforma
Directional de
ation of the dro
eformation of t
opped object an
he dropped ob
nd the plate
bject
Figure 15:
Figure 16:
Equivalent str
Equivalent str
ress of the drop
ress of the drop
pped object and
pped object and
d the plate (top
d the plate (bo
p side)
ottom side)
Figure 17:
Workb
Moreove
‐
‐ C
‐ C
As an ex
Equivalent tot
benchLS‐
er, in the pos
In LS‐DYNA p
Click on Tabu
Click on the
xample, kinem
tal strain of the
DYNATo
st processing
post tool bar
ular Data in t
different op
matic energy
e dropped obje
olbar
g part, LS‐DY
r, Click on AS
the details o
ptions (Figure
y, internal en
ect and the plat
YNA has a cus
SCII and then
of Global data
e 18) in the T
nergy and to
te (Top side)
stomized too
n Global data
a
Tabular Data
tal energy ar
olbar with th
a
a to add a ne
re illustrated
he following
ew line
d in Figur
feature
re 19.
Figure 18:
LS‐DYNA toolbbar
Figure
CompDropp
The calc
static st
direction
kJ) as th
structure
energy i
during a
static an
e 19: Kinetic Ene
areWorkpedObjec
culated resu
ructure resu
n). The displa
he dynamic
e (which is p
n the dynam
an impact an
nalysis is pres
ergy (gray), Int
kbenchLctandth
lts by Work
ults. The dro
acement of t
(Workbench
presented by
mic (Workbe
nalysis both s
sented in Fig
ternal Energy (g
LS‐DYNAhePlate
kbench LS‐DY
opped objec
the dropped
h LS‐DYNA)
the strain e
ench LS‐DYNA
structural an
gure 20.
green) and Tota
Resultsw
YNA can be
ct is defined
object is tun
analysis. It
nergy) in the
A) analysis.
nd kinetic en
al Energy (red)
withthe
e directly co
by a remot
ned to gener
means that
e static analy
However, th
nergies are p
StaticRe
mpared wit
te displacem
rate the sam
t the work d
ysis should b
his is a conse
present. The
esultsfor
h the corre
ment (11.5 m
me kinetic ene
done to def
e equal to th
ervative app
e strain Ener
rthe
sponding
mm in –Y
ergy (~50
form the
he kinetic
proach as
gy of the
Boundar
Figure 2and the (Workbe
ry condition
1 to Figure 2maximum eqench LS‐DYNA
and the post
24 present thquivalent strA) analyses r
Figur
t processing
he maximumrain decreaserespectively.
re 20: Strain en
results are s
m equivalent es from 0.03.
nergy of the sta
shown below
stress reduc3 to 0.01 in t
tic analysis
w.
es form 404 he static and
MPa to 359 d the dynam
MPa ic
Figure 21:
Figure 22:
Boundary con
Equivalent str
dition of the st
ress of the drop
tatic model
pped object andd the plate for the static model (top side)
Figure 23:
Figure 24:
By comp
user can
the code
Equivalent str
Equivalent str
paring the ca
n clearly find
e compliance
ress of the drop
rain of the drop
alculated res
out that ho
e and meet t
pped object and
pped object and
ults of Work
w the result
he industry d
d the plate for
d the plate for
kbench LS‐DY
ts are optimi
demands.
the static mod
the static mod
YNA and the
ized on the n
el (bottom side
el
e static struc
non‐conserv
e)
ctural analys
vative way co
es, Ansys
onfirming