XANSYS Message: 95467 [Go back to message list]
Average Rating: 10 (1 votes)
Subject: Re: [PC] Windows XP SP3
Author: Senthil Gopinathan
Date: 2008-10-15 18:44:45I have experienced a slow startup time after SP3 patching. From ~20 sec
(for SP2) to more than 1.5 minutes. Some applications run somewhat
slower. if you Google, you will find similar complaints.
Senthil Gopinathan
Systems Engineering
HR Textron//Textron Systems
25200 W. Rye Canyon Rd.
Santa Clarita, CA 91355
-----Original Message-----
From: xansys-bounces_at_xansys.org [mailto:xansys-bounces_at_xansys.org] On
Behalf Of Frank Exius
Sent: Wednesday, October 15, 2008 9:26 AM
To: 'ANSYS User Discussion List'
Subject: [Xansys] [PC] Windows XP SP3
Hello everybody,
anyone installed SP3 yet, any complaints esp.
ANSYS stability problems, or other. Like, has
ANSYS Inc. approved SP3 officially ?
Thanks for any notice.
Gruesse,
Frank Exius
IFE Deutschland
www.ife-ansys.de
Telefon +49-2642-980409
Geschaeftszeiten Mo-Fr 09-18:00 Uhr
-----Original Message-----
From: xansys-bounces_at_xansys.org [mailto:xansys-bounces_at_xansys.org] On
Behalf Of Andre Beim
Sent: Monday, October 13, 2008 4:36 PM
To: 'ANSYS User Discussion List'
Subject: [Xansys] RES: [Struc] crack propagation in fatigue
Robin,
I know and use BS 7910 for a long time; it is exactly the criteria I am
comparing with. The point is that this norm does not say anything about
the
effect of the size of the flaw in the crak propagation rate, or what is
the
minimum size the propagation law is valid. It does say about slag
inclusions
at weld toes, with heights of 0.15 to 0.4 mm, in the paragraph about S-N
curves.
Andre Beim
Tresca Eng., Brasil
e-mail: andre_at_tresca.com.br
-----Mensagem original-----
De: xansys-bounces_at_xansys.org [mailto:xansys-bounces_at_xansys.org] Em nome
de
Robin Borland
Enviada em: domingo, 12 de outubro de 2008 16:17
Para: xansys_at_xansys.org
Assunto: Re: [Xansys] [Struc] crack propagation in fatigue
Andre,
You might want to look at BS7910 for a detailed procedure on how to
assess
cracks in welds, TWI has software available for assessment. There are a
lot
of factors to consider such as estimation of secondary stresses, whether
there is post weld heat treatment etc. see
http://www.twisoftware.com/crackwise
Regards
Robin Borland
Integra Developments LLC
Andre,
I didn't know this is about weld, which should make it different. I use
SN
curve in BS7608 to address weld fatigue. What part of ASME code are you
using for fatigue analysis?
For welds, there needs a specification on flaw size for inspection. And
I
believe the understanding of the crack growth rate of different size do
help
for the specification and for defining inspection period.
Guowei Li
Engineering Analyst | Westport Innovations Inc.
604-718-2048 | gli_at_westport.com
-----Original Message-----
From: xansys-bounces_at_xansys.org [mailto:xansys-bounces_at_xansys.org] On
Behalf
Of Andre Beim
Sent: October 10, 2008 8:23 AM
To: 'ANSYS User Discussion List'
Subject: Re: [Xansys] [Struc] crack propagation in fatigue
Guowei Li,
I agree with you, but there are specifications with this requirement for
new
welds, for which I want to find a way to rule out.
Andre Beim
Tresca Eng., Brasil
e-mail: andre_at_tresca.com.br
-----Mensagem original-----
De: xansys-bounces_at_xansys.org [mailto:xansys-bounces_at_xansys.org] Em nome
de
Guowei Li Enviada em: quinta-feira, 9 de outubro de 2008 19:50
Para: ANSYS User Discussion List
Assunto: {SPAM} Re: [Xansys] [Struc] crack propagation in fatigue
I would think these are two related but distinct issues.
Fatigue is where a part is experiencing crack initiation and crack
propagation. The life is the summation of the crack initiation and the
crack
propagation, which is what ASME tells. Crack propagation (Paris) account
for
the latter part.
Crack propagation analysis can provide a quantitative risk assessment of
a
flaw size on a component and prediction of the next inspection time.
Hope this can explain.
Cheers,
Guowei Li
Engineering Analyst | Westport Innovations Inc.
604-718-2048 | gli_at_westport.com
-----Original Message-----
From: xansys-bounces_at_xansys.org [mailto:xansys-bounces_at_xansys.org] On
Behalf
Of Andre Beim
Sent: October 9, 2008 11:31 AM
To: 'ANSYS User Discussion List'
Subject: [Xansys] [Struc] crack propagation in fatigue
I want to bring a new issue to an old topic. Some time ago, some people
told about a trend in fatigue analysis, to consider a small initial
deffect
in the material (some say is 0.25 mm, others say 0.3, others say even
0.5
mm), and calculate the life with the fatigue propagation laws (Paris
law). I
had recently a case in which a part was safe according to the ASME
fatigue
curve (which is known to be very conservative), but unsafe when
calculated
by this small crack propagation criteria. A metallurgist told me the
reason
is that the propagation curves are determined with test specimens with
large
cracks, and the propagation of a small crack is a completely different
phenomenon, which depends on the material (he said he had some
experimental
curves). I did not find anything about this in the codes. BTW, the part
I
designed did not fail. Does anybody know any code or published data
showing
this difference?
Andre Beim
Tresca Eng., Brasil
e-mail: andre_at_tresca.com.br
-----Original Message-----
From: xansys-bounces_at_xansys.org [mailto:xansys-bounces_at_xansys.org] On
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Of xansys-request_at_xansys.org
Sent: Saturday, October 11, 2008 3:00 PM
To: xansys_at_xansys.org
Subject: Xansys Digest, Vol 69, Issue 10
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