femfat newsletter 07 05 e
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Magna Powertrain (MPT) and Altair Engineering
held a “Fatigue & Durability Meeting” in
Troy/Detroit on the 21 October. The pleasant
surroundings of the Altair Headquarters were
used as the venue for presenting the software
from both companies and for discussing hot
topics in operational strength analysis. MPT
and Altair were delighted to welcome some
80 delegates, primarily from the automotive
industry, including DaimlerChrysler, Ford,
Nissan, Detroit Diesel, Toyota, Mazda,
Honda, AVL, FEV, Federal Mogul, SMW,
Wayne State University, Visteon, McLarren
Performance and BASF, to name but a few.
The presentations kicked off with a review
of the HyperWorks products from Altair,
followed by presentations from the FEMFAT
team of Helmut Dannbauer, Dietmar
Peiskammer and Matthias Meise who
described capabilities of the FEMFAT
modules in detail and illustrated potential
applications. Specialized topics included
“Stress and fatigue analysis of a cylinder
block”, “Predicting car body fatigue life”,
"Virtual iteration using MBS and FEMFAT”
or “Modal-based strength analysis of a
crankshaft using NASTRAN, ADAMS and
FEMFAT”. A relevant workshop example
completed each presentation, demonstrating
the simplicity and speed of using FEMFAT.
During the lively discussion periods, there
was a vigorous exchange of views between
the delegates. Numerous detailed questions
on specific applications linked to FEMFAT
were discussed with the local support team
in Troy, even days after the meeting.
Looking forward to the second “FEMFAT
User Meeting North America”, which takes
place in fall 2006 in Detroit, the FEMFAT
team are hoping for numerous user papers.
MAGNA POWERTRAIN – ALTAIR cooperation:
intensive discussions are currently taking
place with Altair on the future coupling of
FEMFAT in HyperView. On the cards is a
preconfigured FEMFAT startup, in which
entity and stress data is imported auto-
matically for example. This can deliver
even greater efficiency when working with
Altair products.
Fifty delegates, including major companies
such as Hyundai Motor Co., Tata Daewoo,
Katech, Rotem, Doosan Infracore, Jatco, and
DongYang Piston, and representatives from
the Kangwon, Kyungsang, Donga and Hanseo
Universities met on 13 October in the “63
Building” in Seoul for the first Korean FEMFAT
User Meeting. In addition to the presentation
on FEMFAT 4.6 and practical tips, durability
experts from Doosan Infracore (formerly
Daewoo), Rotem and our partner ATES talked
about their experiences with FEMFAT.
We attribute the increasing number of Korean
users not only to FEMFAT’s excellent repu-
tation, but also to the expert sales and
support provided for our products by our
sales partner ATES Advanced Technology
Engineering Services.
Contents:
1st FEMFAT User Meeting, Korea ___ 1
Durability & Fatigue Meeting, Detroit _______________ 1
Future platform strategy __________ 2
FAQs: When/Why BASIC,ChannelMAX orTransMAX _______________ 3
Isothermaltemperature influence ____ 3
FEMFAT star tup options ___ 3
Training courses ________________ 4
News __________________________ 4
Stop press _____________________ 4
Event calendar 2006 ____________ 4
Publisher’s information __________ 4
Visit our website:
www.femfat.com
Winter Edition 2005/2006 - No. 7
1st FEMFAT User Meeting Korea, Seoul
Happy Christmas!Many thanks for your continued loyalty. Durability & Fatigue Meeting, Detroit
FEMFAT VISUALIZER –Evaluation extended
In FEMFAT 4.6, the VISUALIZER module
has also been significantly revised,
and new features added (stress ani-
mation).
Numerous improvements in per for-
mance feature alongside high display
quality and automatic graphical output.
We invite you to tr y out this cost-
effective tool free for one-month, so
that you can see for yourself the
benefits of FEMFAT VISUALIZER.
FEMFATNEWSLETTER Winter Edition 2005/2006
2
Future platform strategyIn general, all FEMFAT modules will run in future on all supported
hardware platforms.
Summary of FEMFAT 4.6 hardware platforms
Operating system Platform Bits Note
Linux i686 32 glibc 2.3 or above, Kernel 2.4 or above
Linux Opteron, 64 glibc 2.3 or above, AMD64, EM64T Kernel 2.6
Linux Itanium2 64 glibc 2.3 or above,Kernel 2.4 or above
AIX ≥ 5.1L Power3/4 64
IRIX ≥ 6.5.22 MIPS 32
HP UX ≥ 11.00 PA-Risc 2.0 64 HP Quality Pack required
HP UX ≥ 11.23 Itanium2 64
Windows 2000/XP i686 32 SP3 required
Windows XP 64 Opteron, 64 planned releaseAMD64, EM64T spring 2006
SUN Solaris Sparc 32
Summary of FEMFAT 4.6 interfaces
All binary interfaces automatically support big/little endian conversion(data transfer PC <-> workstation).
Interface
Abaqus fil B ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✗ * ✓
Abaqus odb B ✓! ✓! ✓! ✓ ✓ ✓ ✓ ✓! * ✓
Ansys cdb A ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ * ✓
Ansys geo A ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ * ✓
Ansys lis A ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ * ✓
Ansys rst B ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ * ✓
Cosmos A ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ * ✓
I-DEAS universal A ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ * ✓
Indeed A ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ * ✓
Intergraph A ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ * ✓
LS-Dyna d3plot B ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ * ✓
Marc t16 B ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ * ✓
Medina bif/bof B ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ * ✓
Nastran bulk A ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ * ✓
Nastran op2 B ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✗ * ✓
Patran neutral A ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ * ✓
Pro Mechanica A ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ * ✓
Key:
✓ supports files > 2 Gb
✓! supports odb files > 2 Gb, although an internal transfer file
must remain < 2Gb
✗ limited to 2 Gb* spring 2006 (files > 2 Gb)
Performance comparison for FEMFAT 4.6
Hardware Operating system CPU speed [Mhz]
AMD Opteron Redhat EL 3 2000
Intel Pentium IV Windows XP 3400
SGI Altix Redhat EL 3 1400
HP Itanium2 HP-UX 11.22 900
IBM Power3 AIX 5.1L 450
Intel Pentium III Redhat 7.3 800
SGI MIPS IRIX 6.5 400
HP PA-Risc HP UX 11.00 360
SUN Sparc Solaris 8 333
Computing time normalized to AMD Opteron
Platform planning for FEMFAT 4.7 and 4.8
FEMFAT has been supporting a large number of hardware platforms
for many years. This flexibility is highly valued by customers. On the
other hand, every additional platform ties up development capacity
that cannot be invested in the product itself. Looking at machine
performance, their extent of use amongst FEMFAT users and the
strategy of hardware manufacturers, then an end is foreseeable for
the SUN Sparc-based systems and the MIPS-based SGI hardware.
The 32 bit versions of the Linux and Windows PC operating systems
are also likely to be rapidly superseded by their 64-bit successors
in the technical sector. Given the widespread use of 32-bit systems,
however, no definitive date has been set for discontinuing their
support.
The following platforms will be fully supported for a limited period:
• SUN Sparc versions including 4.6x (until approx. end of 2006)
• SGI MIPS versions including 4.7x (until approx. end of 2007)
This information relates to the FEMFAT application. SUN Sparc and
SGI MIPS will be supported as license servers for as long as
customers are using these systems.
Bin
ary
/Ascii
Lin
ux,
i686
Lin
ux,
Opte
ron, AM
D64, EM
64T
Lin
ux,
Ita
niu
m2
AIX
≥ 5
.1L, Pow
er
3/4
IRIX
≥ 6
.5.2
2, M
IPS
HP U
X ≥
11.0
0, PA-R
isc 2
.0
HP U
X ≥
11.2
3, Itaniu
m2
Win
dow
s 2
000/XP, i6
86
Win
dow
s X
P64, AM
D64, EM
64T
SU
N 3
2 S
ola
ris, S
parc
AMD Opteron
Intel Pentium IV
SGI Altix
HP Itanium2
IBM Power3
Intel Pentium III
SGI MIPS
HP PA-Risc
SUN Sparc
FEMFATNEWSLETTERWinter Edition 2005/2006
3
FAQs
When/Why BASIC, ChannelMAX or TransMAX?
BASIC
Uses a simple load history that can be des-
cribed by two states and a constant component
(e.g. assembly).
Advantage: the analysis speed is very fast
because BASIC holds the data in RAM.
Examples: Conrod, cylinder head, gearbox casing, shafts etc.
Input data required:
• Upper/lower stress or amplitude/mean stress
• Constant stress (optional)
• Load spectrum for damage analysis
ChannelMAX
The load history is as complex as you wish
and can be described by superimposing “unit
load cases” (static states or modal shapes).
The system response (except local plastic
deformations) must be linear; up to millions
of time points possible.
Examples: wheel mounts, axle frames, body work, crank shafts
Input data required:
• One stress result per channel (load direction, modal shape)
• One load-time sequence per channel
TransMAX
Most general form of the load history. The
system response can be completely non-linear;
number of time points limited to hundreds
(thousands).
Examples: cylinder block and other components with complex
contacts.
Input data required:
• Sequence of computed stress states over time
Isothermal temperature influence
Enabling the isothermal temperature influence means that the local
operating temperature is taken into account at all analyzed nodes
(usually upper temperature).
FEMFAT provides various analysis methods for this:
“FKM guideline” method
The isothermal temperature only affects the dynamic strength
values in the Haigh diagram (vertical scaling).
“FEMFAT 4.5” method
This option changes both the dynamic strength parameters in the
Haigh diagram (similar to the FKM guideline) and the static strength
parameters (horizontal scaling of the Haigh diagram). The same
formulae from the FKM guideline are used for modifying the yield
stress and ultimate tensile stress. The user is warned if the
temperature exceeds the range defined in the FKM guideline, and
the influence factor is extrapolated on the basis of the implemented
formulae.
“User defined” method
In this method, the temperature dependent material data specified
by the user is taken into account; this data can be defined in the
menu “Material data -> Properties at higher temperatures”. The
temperature dependent fully reversed endurance limit and the ultimate
tensile strength must be defined as a minimum for this method.
“FEMFAT 4.6” method (default)
This option is based on method 4.5, but in addition the cyclic
coefficient of hardening K’ of the cyclic stress-strain curve is
reduced in a similar way as the ultimate tensile strength. This
means that the isothermal temperature influence is also correctly
taken into account in the mean stress redistribution of linear elastic
stresses according to Neuber (FEMFAT PLAST module).
Isothermal temperature influence on Rm, Re and K´
One can see from the curves that all temperature influences based
on FKM produce conservative results.
FEMFAT startup options
The start lines for UNIX/Linux read: femfat4 <-Option> and for
Windows: CALL femfat.tcl <-Option>
-ini
The -ini option opens a menu immediately after startup for defining
the memory allocation, interface formats and user interface.
-lic
This option can be used from FEMFAT 4.6 version onwards. It
displays a dialog box in which one can select from the available
licenses, the modules required for the current job. This is useful
for all customers who have a different number of licenses for
different modules.
-dsp = Display#
This option can be used to specify a redirection to any Ethernet
address of another machine. Without a valid display, FEMFAT cannot
startup i.e. this option is often required with server machines.
-job = Jobname.ffj
Execution of multiple FEMFAT analyses in batch mode can be
automated. Similar jobs containing only slight changes e.g. filenames
of FEM data - are easy to set up from an existing job.ffj file using
an editor. The modified jobs are given a new name (e.g. job2.ffj,
job3.ffj,..) and can be listed sequentially under UNIX/Linux in a
shell script.
Under Windows, the *.bat extension must be selected so that the
file can subsequently be executed.
A detailed explanation is given in the “Introduction” chapter in the
FEMFAT user manual.
0,0000
0,2000
0,4000
0,6000
0,8000
1,0000
1,2000
20 50 100 150 200 250 300 350 400 450 500Temperature [°C]
Influe
nce f
actor
Steel/nickel alloy / tool steel
Fine-grained steel
Gray cast iron
Compacted graphite iron / nodular graphite cast iron / sintered steel
Malleable cast iron
Cast steel
Aluminum
Prices (excl. VAT):
per delegate Euro 770.00
per additional delegate
from the same
company Euro 610.00
University/research
organization Euro 300.00
Including 2 month FEMFATevaluation license
Information:
a.schmidthaler@ecs.steyr.com
FEMFATNEWSLETTER Winter Edition 2005/2006
4
Multiaxial fatigue
Welded structures
Spot-joined structures
Analysis & preparation of data
Sub-modeling
Engine dynamics/Acousticssimulation
BREAKStatic safety factors
Local plasticityPLAST
HEATThermomechanical fatigue
STRAINMeasured strain basedfatigue analyses
3D-postprocessor
Fatigue life/Damage andsafety factors for simple loads,comprehensive FE-interfacesand material database
Event calendar 2006
*** STOP PRESS *** STOP PRESS *** STOP PRESS *** STOP PRESS *** STOP PRESS ***
FEMFAT training courses - new dates 2006
Publisher’s information:
Engineering Center Steyr GmbH & Co KGSteyrer Strasse 32, A-4300 St. ValentinTel: ++43 7435 501 303,Fax: ++43 7435 501 300a.schmidthaler@ecs.steyr.comwww.femfat.com
FEMFAT Road Show, FrankfurtSeventeen interested parties - mainly newcomers
- came to a free information day at the Hotel
Plaza in Frankfur t Offenbach on 8 November
2005. Using practical examples, we demonstrated
potential FEMFAT applications and provided
information on inter faces and all the major
FEMFAT modules. Its success has prompted us
to hold fur ther road shows: on 07.02.06 in
Hamburg and on 11.04.06 in Stockholm.
You can already register your interest with us by
e-mail or phone; you will receive a separate
invitation shortly.
Call for Papers and NotificationWe are currently intent on informing global cu-
stomers of the new range of potential applications
for FEMFAT and its additional features. After a
successful first Korean FEMFAT User Meeting in
October 2005, we are holding the 2nd FEMFAT
User Meeting Japan in the Palace Hotel Tokyo
on 10 March 2006, and the 2nd FEMFAT User
Meeting USA in Troy, Michigan in fall 2006.
More details will appear in the next issue of the
FEMFAT Newsletter. We would be delighted to
reserve a slot for any FEMFAT users already
interested in presenting a paper.
FEMFAT 4.6 released
Good things come to those who wait! And that’s
certainly true of the new FEMFAT 4.6 version,
which FEMFAT users will find under their meta-
phorical Christmas tree in December 2005.
As recompense for the wait - admittedly tempered
by a number of interim versions - the new version
includes an awesome VISUALIZER, major new
interfaces and perfected features in the MAX,
SPOT and WELD module. Have fun FEMFATing!
*** NEWS *** NEWS *** NEWS *** NEWS *** NEWS *** NEWS *** NEWS *** NEWS ***
7th Graz Four-wheel Congress Graz 02 - 03 Feb. 2006
Computable Casting in the Motor Industry Aachen 14 - 15 Feb. 2006
FEMFAT User Meeting Japan Tokyo 10 March 2006
Leoben Operational Strength Conference Planneralm 08 - 10 March 2006
Reliability of Mechatronic/Adaptronic Systems Darmstadt 15 - 16 March 2006
FEM Design Optimization Conference Stuttgart 21 - 22 March 2006
SAE World Congress Detroit 03 - 06 April 2006
27th International Viennese Motor Symposium Vienna 27 - 28 April 2006
DVM Day 2006 Material Parameters Berlin 09 - 11 May 2006
2nd Graz Commercial Vehicle Workshop Graz 12 May 2006
Fatigue 2006 Atlanta 14 - 19 May 2006
Gears in vehicles 2006 (VDI) Friedrichshafen 27 - 28 June 2006
Aachen Colloquium Aachen 09 -11 Oct. 2006
DVM 32nd Operational Strength Conference Steyr 11 - 12 Oct. 2006
Fisita 2006 Yokohama 22 - 27 Oct. 2006
FEMFAT User Meeting USA Detroit Fall 2006
Engineering Center Steyr, St. Valentin23 - 24 February 200626 - 27 April 200613 - 14 September 20066 - 7 December 2006
Engineering Center Troy, Detroit17 February 200616 June 200620 October 2006
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