1. Re: Primary creep in ANSYS - v2 (Mohammad Gharaibeh)

Hi, The following publication covers two equations; eqn. 1 which is based on strain and eqn. 3 is for strain rate. Author reports that both equations as representing Norton-Bailey-Law. Please see whether this publication could be of help to sort out the confusion. https://momrg.cecs.ucf.edu/wp-content/uploads/2019/05/May-D.-Segletes-D.-and-Gordon-A.-P.-2013-The-Application-of-the-Norton-Bailey-Law-for-Creep-Prediction-through-Power-Law-Regression.pdf I do not work in this field, hence have not tried to study/interpret the publication. Thanks Roshan A.D AERB, India On 12-10-2023 13:00, xansys-temp-request@list.xansys.org wrote: > Send Xansys mailing list submissions to > xansys-temp@list.xansys.org > > To subscribe or unsubscribe via email, send a message with subject or > body 'help' to > xansys-temp-request@list.xansys.org > > You can reach the person managing the list at > xansys-temp-owner@list.xansys.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Xansys digest..." > > Today's Topics: > > 1. Re: Primary creep in ANSYS - v2 (Mohammad Gharaibeh) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 11 Oct 2023 15:15:36 +0300 > From: Mohammad Gharaibeh <mgharai1@binghamton.edu> > Subject: [Xansys] Re: Primary creep in ANSYS - v2 > To: XANSYS Mailing List Home <xansys-temp@list.xansys.org> > Message-ID: > <CANMK5m2NFHpx491_ukzvHniJAPYnKBRtzL0+Xg8w_uEF828Nag@mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > I found this from SOLIDWORKS help which states that the primary creep > strain is given by the equation mentioned in my previous email of Mukhrejee > et al., (2016), “Creep Constitutive Models Suitable for Solder Alloys in > Electronic Assemblies”, Journal of Electronic Packaging, Vol 138, 3. > > > https://help.solidworks.com/2012/english/SolidWorks/cworks/Creep_Models.htm?format=P&value= > > If ANSYS uses the same equation considering primary creep “strain rate”, I > think this is a problem. Or maybe there’s something I cannot catch. > > Any thoughts? > > Best, > MG > > — > Guest Professor > IMTEK > University of Freiburg > > On Monday, October 9, 2023, Mohammad Gharaibeh <mgharai1@binghamton.edu> > wrote: > >> Dear ANSYS Experts, >> >> I have been asked to do some primary (transient) creep modeling using >> ANSYS. The proposed primary creep model is Bailey-Norton model (strain = >> C0*stress^C1*time^C2*exp(-C4/Temp)) please note that this equation >> obtains the strain - reference: Table 1 of Mukhrejee et al., (2016), >> “Creep Constitutive Models Suitable for Solder Alloys in Electronic >> Assemblies”, Journal of Electronic Packaging, Vol 138, 3. Many other >> primary creep models are mentioned and all compute the strain as a function >> of time, stress and/or temperature. >> >> The above paper cites the original reference of the Bailey-Norton model >> which I tried to find but I didn’t succeed. This cited reference is: Norton >> & Bailey (1954),” Creep of Steel”, Trans. ASM, 52, p. 114. If anyone could >> provide this paper I will be very grateful. >> >> However, When I read TFM, I noticed that this model is given for the >> strain rate (strain rate = C0*stress^C1*time^C2*exp(-C4/Temp)), in >> Mechanical APDL Materials Reference R19.0. >> >> This has been scratching my mind in the last few days. >> >> Is it just a typo somewhere or am I missing something? I would love some >> inputs from ANSYS guys of this list. >> >> Best, >> Mohammad >> >> >> >> -- >> ===================================== >> Mohammad A Gharaibeh, Ph.D. >> Associate Professor >> Department of Mechanical Engineering >> The Hashemite University >> P.O. Box 330127 >> Zarqa, 13133, Jordan >> Tel: +962 - 5 - 390 3333 Ext. 4771 >> Fax: +962 - 5 - 382 6348 >> ===================================== >> >> >> >> -------------------------------------------------------------------------------------------- This mail has been scanned by Interscan Messaging Security Virtual Appliance of Trend Micro -------------------------------------------------------------------------------------------- Disclaimer: ------------ The communication transmitted through e-mail or any other modes with the attached files are intended solely for the use of the addressed individual or entity for official purpose only. It contains information that is confidential and protected from disclosure. It must not be printed, read, copied, disclosed, forwarded, distributed or used (in whatsoever manner) by any person other than the addressee. Unauthorised use, disclosure or copying is strictly prohibited and may constitute unlawful act and can possibly attract legal action. If you have received this message in error, you should destroy this message and may please notify the sender by e-mail. Thank you.

 1. Re: Primary creep in ANSYS - v2 (Mohammad Gharaibeh)

Dear Roshan, Thanks for the response and for the paper. I will dig into it and see what I can do. Best, MG On Thu, 12 Oct 2023 at 4:07 PM Roshan A D <adroshan@aerb.gov.in> wrote: > Hi, > > The following publication covers two equations; eqn. 1 which is based on > strain and eqn. 3 is for strain rate. Author reports that both equations > as representing Norton-Bailey-Law. Please see whether this publication > could be of help to sort out the confusion. > > > https://momrg.cecs.ucf.edu/wp-content/uploads/2019/05/May-D.-Segletes-D.-and-Gordon-A.-P.-2013-The-Application-of-the-Norton-Bailey-Law-for-Creep-Prediction-through-Power-Law-Regression.pdf > > I do not work in this field, hence have not tried to study/interpret the > publication. > > Thanks > > Roshan A.D > > AERB, India > > > On 12-10-2023 13:00, xansys-temp-request@list.xansys.org wrote: > > Send Xansys mailing list submissions to > > xansys-temp@list.xansys.org > > > > To subscribe or unsubscribe via email, send a message with subject or > > body 'help' to > > xansys-temp-request@list.xansys.org > > > > You can reach the person managing the list at > > xansys-temp-owner@list.xansys.org > > > > When replying, please edit your Subject line so it is more specific > > than "Re: Contents of Xansys digest..." > > > > Today's Topics: > > > > 1. Re: Primary creep in ANSYS - v2 (Mohammad Gharaibeh) > > > > > > ---------------------------------------------------------------------- > > > > Message: 1 > > Date: Wed, 11 Oct 2023 15:15:36 +0300 > > From: Mohammad Gharaibeh <mgharai1@binghamton.edu> > > Subject: [Xansys] Re: Primary creep in ANSYS - v2 > > To: XANSYS Mailing List Home <xansys-temp@list.xansys.org> > > Message-ID: > > < > CANMK5m2NFHpx491_ukzvHniJAPYnKBRtzL0+Xg8w_uEF828Nag@mail.gmail.com> > > Content-Type: text/plain; charset="UTF-8" > > > > I found this from SOLIDWORKS help which states that the primary creep > > strain is given by the equation mentioned in my previous email of > Mukhrejee > > et al., (2016), “Creep Constitutive Models Suitable for Solder Alloys in > > Electronic Assemblies”, Journal of Electronic Packaging, Vol 138, 3. > > > > > > > https://help.solidworks.com/2012/english/SolidWorks/cworks/Creep_Models.htm?format=P&value= > > > > If ANSYS uses the same equation considering primary creep “strain rate”, > I > > think this is a problem. Or maybe there’s something I cannot catch. > > > > Any thoughts? > > > > Best, > > MG > > > > — > > Guest Professor > > IMTEK > > University of Freiburg > > > > On Monday, October 9, 2023, Mohammad Gharaibeh <mgharai1@binghamton.edu> > > wrote: > > > >> Dear ANSYS Experts, > >> > >> I have been asked to do some primary (transient) creep modeling using > >> ANSYS. The proposed primary creep model is Bailey-Norton model (strain = > >> C0*stress^C1*time^C2*exp(-C4/Temp)) please note that this equation > >> obtains the strain - reference: Table 1 of Mukhrejee et al., (2016), > >> “Creep Constitutive Models Suitable for Solder Alloys in Electronic > >> Assemblies”, Journal of Electronic Packaging, Vol 138, 3. Many other > >> primary creep models are mentioned and all compute the strain as a > function > >> of time, stress and/or temperature. > >> > >> The above paper cites the original reference of the Bailey-Norton model > >> which I tried to find but I didn’t succeed. This cited reference is: > Norton > >> & Bailey (1954),” Creep of Steel”, Trans. ASM, 52, p. 114. If anyone > could > >> provide this paper I will be very grateful. > >> > >> However, When I read TFM, I noticed that this model is given for the > >> strain rate (strain rate = C0*stress^C1*time^C2*exp(-C4/Temp)), in > >> Mechanical APDL Materials Reference R19.0. > >> > >> This has been scratching my mind in the last few days. > >> > >> Is it just a typo somewhere or am I missing something? I would love some > >> inputs from ANSYS guys of this list. > >> > >> Best, > >> Mohammad > >> > >> > >> > >> -- > >> ===================================== > >> Mohammad A Gharaibeh, Ph.D. > >> Associate Professor > >> Department of Mechanical Engineering > >> The Hashemite University > >> P.O. Box 330127 > >> Zarqa, 13133, Jordan > >> Tel: +962 - 5 - 390 3333 Ext. 4771 > >> Fax: +962 - 5 - 382 6348 > >> ===================================== > >> > >> > >> > >> > > -------------------------------------------------------------------------------------------- > This mail has been scanned by Interscan Messaging Security Virtual > Appliance of Trend Micro > > -------------------------------------------------------------------------------------------- > Disclaimer: > ------------ > > The communication transmitted through e-mail or any other modes with the > attached files are intended solely for the use of the addressed individual > or entity for official purpose only. It contains information that is > confidential and protected from disclosure. It must not be printed, read, > copied, disclosed, forwarded, distributed or used (in whatsoever manner) by > any person other than the addressee. Unauthorised use, disclosure or > copying is strictly prohibited and may constitute unlawful act and can > possibly attract legal action. > If you have received this message in error, you should destroy this > message and may please notify the sender by e-mail. Thank you. > _______________________________________________ > Xansys mailing list -- xansys-temp@list.xansys.org > To unsubscribe send an email to xansys-temp-leave@list.xansys.org > If you are receiving too many emails from XANSYS please consider changing > account settings to Digest mode which will send a single email per day. > > Please send administrative requests such as deletion from XANSYS to > xansys-mod@tynecomp.co.uk and not to the list

 1. Re: Primary creep in ANSYS - v2 (Mohammad Gharaibeh)

Roshan, The paper you've sent is very informative and gave me some insights on what I should do. However, I still have some confusion. The transient creep equation of Bailey-Norton Model is: creep strain = C0*stress^C1*time^C2*exp(-C3/Temp) and the ANSYS Materials Reference gives the same equation for the strain rate as: creep strain rate = C0*stress^C1*time^C2*exp(-C3/Temp) - Please note that same equation forms are used to compute creep strain and creep strain rate. Which is very confusing. Anyway, what I think of doing is to derive the creep strain equation of bailey-Norton with respect to time to get the creep strain rate formula: creep strain rate = C2*C0*stress^C1*time^(C2 - 1)*exp(-C3/Temp) and use this in ANSYS where C2*C0 is the first constant and (C2 - 1) is the third constant. However, I am gonna need to do some validation myself. Or, I would be very grateful if someone could comment on this. Regards, Mohammad ===================================== Mohammad A Gharaibeh, Ph.D. Associate Professor Department of Mechanical Engineering The Hashemite University P.O. Box 330127 Zarqa, 13133, Jordan Tel: +962 - 5 - 390 3333 Ext. 4771 Fax: +962 - 5 - 382 6348 ===================================== On Thu, Oct 12, 2023 at 10:58 PM Mohammad Gharaibeh <mgharai1@binghamton.edu> wrote: > Dear Roshan, > > Thanks for the response and for the paper. I will dig into it and see what > I can do. > > Best, > MG > > On Thu, 12 Oct 2023 at 4:07 PM Roshan A D <adroshan@aerb.gov.in> wrote: > >> Hi, >> >> The following publication covers two equations; eqn. 1 which is based on >> strain and eqn. 3 is for strain rate. Author reports that both equations >> as representing Norton-Bailey-Law. Please see whether this publication >> could be of help to sort out the confusion. >> >> >> https://momrg.cecs.ucf.edu/wp-content/uploads/2019/05/May-D.-Segletes-D.-and-Gordon-A.-P.-2013-The-Application-of-the-Norton-Bailey-Law-for-Creep-Prediction-through-Power-Law-Regression.pdf >> >> I do not work in this field, hence have not tried to study/interpret the >> publication. >> >> Thanks >> >> Roshan A.D >> >> AERB, India >> >> >> On 12-10-2023 13:00, xansys-temp-request@list.xansys.org wrote: >> > Send Xansys mailing list submissions to >> > xansys-temp@list.xansys.org >> > >> > To subscribe or unsubscribe via email, send a message with subject or >> > body 'help' to >> > xansys-temp-request@list.xansys.org >> > >> > You can reach the person managing the list at >> > xansys-temp-owner@list.xansys.org >> > >> > When replying, please edit your Subject line so it is more specific >> > than "Re: Contents of Xansys digest..." >> > >> > Today's Topics: >> > >> > 1. Re: Primary creep in ANSYS - v2 (Mohammad Gharaibeh) >> > >> > >> > ---------------------------------------------------------------------- >> > >> > Message: 1 >> > Date: Wed, 11 Oct 2023 15:15:36 +0300 >> > From: Mohammad Gharaibeh <mgharai1@binghamton.edu> >> > Subject: [Xansys] Re: Primary creep in ANSYS - v2 >> > To: XANSYS Mailing List Home <xansys-temp@list.xansys.org> >> > Message-ID: >> > < >> CANMK5m2NFHpx491_ukzvHniJAPYnKBRtzL0+Xg8w_uEF828Nag@mail.gmail.com> >> > Content-Type: text/plain; charset="UTF-8" >> > >> > I found this from SOLIDWORKS help which states that the primary creep >> > strain is given by the equation mentioned in my previous email of >> Mukhrejee >> > et al., (2016), “Creep Constitutive Models Suitable for Solder Alloys in >> > Electronic Assemblies”, Journal of Electronic Packaging, Vol 138, 3. >> > >> > >> > >> https://help.solidworks.com/2012/english/SolidWorks/cworks/Creep_Models.htm?format=P&value= >> > >> > If ANSYS uses the same equation considering primary creep “strain >> rate”, I >> > think this is a problem. Or maybe there’s something I cannot catch. >> > >> > Any thoughts? >> > >> > Best, >> > MG >> > >> > — >> > Guest Professor >> > IMTEK >> > University of Freiburg >> > >> > On Monday, October 9, 2023, Mohammad Gharaibeh <mgharai1@binghamton.edu >> > >> > wrote: >> > >> >> Dear ANSYS Experts, >> >> >> >> I have been asked to do some primary (transient) creep modeling using >> >> ANSYS. The proposed primary creep model is Bailey-Norton model (strain >> = >> >> C0*stress^C1*time^C2*exp(-C4/Temp)) please note that this equation >> >> obtains the strain - reference: Table 1 of Mukhrejee et al., (2016), >> >> “Creep Constitutive Models Suitable for Solder Alloys in Electronic >> >> Assemblies”, Journal of Electronic Packaging, Vol 138, 3. Many other >> >> primary creep models are mentioned and all compute the strain as a >> function >> >> of time, stress and/or temperature. >> >> >> >> The above paper cites the original reference of the Bailey-Norton model >> >> which I tried to find but I didn’t succeed. This cited reference is: >> Norton >> >> & Bailey (1954),” Creep of Steel”, Trans. ASM, 52, p. 114. If anyone >> could >> >> provide this paper I will be very grateful. >> >> >> >> However, When I read TFM, I noticed that this model is given for the >> >> strain rate (strain rate = C0*stress^C1*time^C2*exp(-C4/Temp)), in >> >> Mechanical APDL Materials Reference R19.0. >> >> >> >> This has been scratching my mind in the last few days. >> >> >> >> Is it just a typo somewhere or am I missing something? I would love >> some >> >> inputs from ANSYS guys of this list. >> >> >> >> Best, >> >> Mohammad >> >> >> >> >> >> >> >> -- >> >> ===================================== >> >> Mohammad A Gharaibeh, Ph.D. >> >> Associate Professor >> >> Department of Mechanical Engineering >> >> The Hashemite University >> >> P.O. Box 330127 >> >> Zarqa, 13133, Jordan >> >> Tel: +962 - 5 - 390 3333 Ext. 4771 >> >> Fax: +962 - 5 - 382 6348 >> >> ===================================== >> >> >> >> >> >> >> >> >> >> -------------------------------------------------------------------------------------------- >> This mail has been scanned by Interscan Messaging Security Virtual >> Appliance of Trend Micro >> >> -------------------------------------------------------------------------------------------- >> Disclaimer: >> ------------ >> >> The communication transmitted through e-mail or any other modes with the >> attached files are intended solely for the use of the addressed individual >> or entity for official purpose only. It contains information that is >> confidential and protected from disclosure. It must not be printed, read, >> copied, disclosed, forwarded, distributed or used (in whatsoever manner) by >> any person other than the addressee. Unauthorised use, disclosure or >> copying is strictly prohibited and may constitute unlawful act and can >> possibly attract legal action. >> If you have received this message in error, you should destroy this >> message and may please notify the sender by e-mail. Thank you. >> _______________________________________________ >> Xansys mailing list -- xansys-temp@list.xansys.org >> To unsubscribe send an email to xansys-temp-leave@list.xansys.org >> If you are receiving too many emails from XANSYS please consider changing >> account settings to Digest mode which will send a single email per day. >> >> Please send administrative requests such as deletion from XANSYS to >> xansys-mod@tynecomp.co.uk and not to the list > >