Empathy List Archives

MG

Mohammad Gharaibeh

Wed, Aug 9, 2023 6:09 PM

Hello XANSYS Experts,

I am performing a thermo-mechanical simulation of a an electronic system
with sintered silver is the die attach material. I am using experimental
stress-strain data (at 3 temperatures). For defining the sintered silver
material model, I used TB command with the options of EXPE and UNITENSION.
The data points are then defined using TBPT. Prior TBPT, Temperatures are
set using TBTEMP.

The model solved just fine and I want to see the stress-strain results from
this simulation. I wonder what strain type (not component) is available in
/POST26 for this kind of material modeling? Elastic, plastic, or else? Or,
am I doing something wrong? Any advice would be greatly appreciated!

Thank you very much,
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

---====

Hello XANSYS Experts, I am performing a thermo-mechanical simulation of a an electronic system with sintered silver is the die attach material. I am using experimental stress-strain data (at 3 temperatures). For defining the sintered silver material model, I used TB command with the options of EXPE and UNITENSION. The data points are then defined using TBPT. Prior TBPT, Temperatures are set using TBTEMP. The model solved just fine and I want to see the stress-strain results from this simulation. I wonder what strain type (not component) is available in /POST26 for this kind of material modeling? Elastic, plastic, or else? Or, am I doing something wrong? Any advice would be greatly appreciated! Thank you very much, 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 =====================================

MG

Mohammad Gharaibeh

Thu, Aug 10, 2023 8:49 AM

Well, let me try to rephrase my question.

Using ANSYS Classic APDL, I am performing a thermo-mechanical simulation of
an electronic system with sintered silver as the die attach material. I am
using experimental stress-strain data (at 3 temperatures) for modeling the
silver. For defining its material model, I used the TB command with the
options of EXPE and UNIAXIAL (and UNITENSION). The stress-strain data
points are then defined using TBPT. Prior TBPT, Temperatures are set using
TBTEMP. Please see the APDL snippet at the end of this email for more
details.

I am doing this because I have fitted Norton Creep parameters (strain_rate
= A * (stress^n) * exp(-Q/RT)) and want to compare between the actual test
stress-strain data simulation results with those of this fitting empirical
model. Does it make sense?

The model solved just fine and I want to see the stress-strain results from
this simulation. There were no strain values stored except the "Elastic
Strains". I believe plastic strains should be also available. Am I missing
something? should I, at some point, define the initiation of plastic
deformation in my material model definition? Please advise!

Best Regards,
Mohammad

APDL:

! Die Attach
MPTEMP,1,25,100,200
MPDATA,EX,2,1,61E3,53E3,49e3
MP,PRXY,2,0.28
MP,CTEX,2,21.7e-6
!

TB,expe,2,3,50,uniaxial ! Could be UNITENSION
TBTEMP,25 ! Define first temperature
!tbpt , , 0.000000 , 0.000000
tbpt , , 0.000280 , 17.794428
tbpt , , 0.000548 , 38.414079
tbpt , , 0.000938 , 63.728864
tbpt , , 0.001343 , 87.815119
tbpt , , 0.001721 , 107.134180
tbpt , , 0.002000 , 128.129020
tbpt , , 0.002255 , 145.976007
tbpt , , 0.002498 , 158.901011
tbpt , , 0.002824 , 176.915343
tbpt , , 0.003188 , 199.353776
tbpt , , 0.003590 , 224.233568
tbpt , , 0.004019 , 248.443674
tbpt , , 0.004445 , 269.039227
tbpt , , 0.004869 , 286.479704
tbpt , , 0.005337 , 310.925911
TBTEMP,100 ! Define second temperature
!tbpt , , 0.000000 , 0.000000
tbpt , , 0.001571 , 73.745654
tbpt , , 0.002005 , 100.639202
tbpt , , 0.002398 , 117.823746
tbpt , , 0.002894 , 140.088412
tbpt , , 0.002969 , 142.336910
tbpt , , 0.002979 , 142.243919
tbpt , , 0.003135 , 151.278902
tbpt , , 0.003891 , 198.233721
tbpt , , 0.004704 , 233.552649
tbpt , , 0.005568 , 264.700466
tbpt , , 0.006054 , 282.188126
tbpt , , 0.006365 , 292.063758
TBTEMP,200 ! Define third temperature
!tbpt , , 0.000000 , 0.000000
tbpt , , 0.001311 , 49.591660
tbpt , , 0.001723 , 67.973589
tbpt , , 0.002206 , 86.082534
tbpt , , 0.002670 , 99.968976
tbpt , , 0.003016 , 109.822132
tbpt , , 0.003361 , 116.975289
tbpt , , 0.003684 , 122.554393
tbpt , , 0.003876 , 127.105099
tbpt , , 0.004258 , 130.714321
tbpt , , 0.004336 , 133.297749
tbpt , , 0.004672 , 134.854808
tbpt , , 0.004738 , 135.597108
tbpt , , 0.005075 , 135.935566
tbpt , , 0.005196 , 136.365141
tbpt , , 0.005440 , 137.314378
tbpt , , 0.005550 , 139.029876
tbpt , , 0.005707 , 141.543198
tbpt , , 0.006137 , 144.719815
tbpt , , 0.006495 , 148.316230
tbpt , , 0.006940 , 151.872619

---====
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 Wed, Aug 9, 2023 at 8:09 PM Mohammad Gharaibeh mgharai1@binghamton.edu
wrote:

Hello XANSYS Experts,

I am performing a thermo-mechanical simulation of a an electronic system
with sintered silver is the die attach material. I am using experimental
stress-strain data (at 3 temperatures). For defining the sintered silver
material model, I used TB command with the options of EXPE and UNITENSION.
The data points are then defined using TBPT. Prior TBPT, Temperatures are
set using TBTEMP.

The model solved just fine and I want to see the stress-strain results
from this simulation. I wonder what strain type (not component) is
available in /POST26 for this kind of material modeling? Elastic, plastic,
or else? Or, am I doing something wrong? Any advice would be greatly
appreciated!

Thank you very much,
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

---====

Well, let me try to rephrase my question. Using ANSYS Classic APDL, I am performing a thermo-mechanical simulation of an electronic system with sintered silver as the die attach material. I am using experimental stress-strain data (at 3 temperatures) for modeling the silver. For defining its material model, I used the TB command with the options of EXPE and UNIAXIAL (and UNITENSION). The stress-strain data points are then defined using TBPT. Prior TBPT, Temperatures are set using TBTEMP. Please see the APDL snippet at the end of this email for more details. I am doing this because I have fitted Norton Creep parameters (strain_rate = A * (stress^n) * exp(-Q/RT)) and want to compare between the actual test stress-strain data simulation results with those of this fitting empirical model. Does it make sense? The model solved just fine and I want to see the stress-strain results from this simulation. There were no strain values stored except the "Elastic Strains". I believe plastic strains should be also available. Am I missing something? should I, at some point, define the initiation of plastic deformation in my material model definition? Please advise! Best Regards, Mohammad APDL: ! Die Attach MPTEMP,1,25,100,200 MPDATA,EX,2,1,61E3,53E3,49e3 MP,PRXY,2,0.28 MP,CTEX,2,21.7e-6 ! TB,expe,2,3,50,uniaxial ! Could be UNITENSION TBTEMP,25 ! Define first temperature !tbpt , , 0.000000 , 0.000000 tbpt , , 0.000280 , 17.794428 tbpt , , 0.000548 , 38.414079 tbpt , , 0.000938 , 63.728864 tbpt , , 0.001343 , 87.815119 tbpt , , 0.001721 , 107.134180 tbpt , , 0.002000 , 128.129020 tbpt , , 0.002255 , 145.976007 tbpt , , 0.002498 , 158.901011 tbpt , , 0.002824 , 176.915343 tbpt , , 0.003188 , 199.353776 tbpt , , 0.003590 , 224.233568 tbpt , , 0.004019 , 248.443674 tbpt , , 0.004445 , 269.039227 tbpt , , 0.004869 , 286.479704 tbpt , , 0.005337 , 310.925911 TBTEMP,100 ! Define second temperature !tbpt , , 0.000000 , 0.000000 tbpt , , 0.001571 , 73.745654 tbpt , , 0.002005 , 100.639202 tbpt , , 0.002398 , 117.823746 tbpt , , 0.002894 , 140.088412 tbpt , , 0.002969 , 142.336910 tbpt , , 0.002979 , 142.243919 tbpt , , 0.003135 , 151.278902 tbpt , , 0.003891 , 198.233721 tbpt , , 0.004704 , 233.552649 tbpt , , 0.005568 , 264.700466 tbpt , , 0.006054 , 282.188126 tbpt , , 0.006365 , 292.063758 TBTEMP,200 ! Define third temperature !tbpt , , 0.000000 , 0.000000 tbpt , , 0.001311 , 49.591660 tbpt , , 0.001723 , 67.973589 tbpt , , 0.002206 , 86.082534 tbpt , , 0.002670 , 99.968976 tbpt , , 0.003016 , 109.822132 tbpt , , 0.003361 , 116.975289 tbpt , , 0.003684 , 122.554393 tbpt , , 0.003876 , 127.105099 tbpt , , 0.004258 , 130.714321 tbpt , , 0.004336 , 133.297749 tbpt , , 0.004672 , 134.854808 tbpt , , 0.004738 , 135.597108 tbpt , , 0.005075 , 135.935566 tbpt , , 0.005196 , 136.365141 tbpt , , 0.005440 , 137.314378 tbpt , , 0.005550 , 139.029876 tbpt , , 0.005707 , 141.543198 tbpt , , 0.006137 , 144.719815 tbpt , , 0.006495 , 148.316230 tbpt , , 0.006940 , 151.872619 ===================================== 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 Wed, Aug 9, 2023 at 8:09 PM Mohammad Gharaibeh <mgharai1@binghamton.edu> wrote: > > Hello XANSYS Experts, > > I am performing a thermo-mechanical simulation of a an electronic system > with sintered silver is the die attach material. I am using experimental > stress-strain data (at 3 temperatures). For defining the sintered silver > material model, I used TB command with the options of EXPE and UNITENSION. > The data points are then defined using TBPT. Prior TBPT, Temperatures are > set using TBTEMP. > > The model solved just fine and I want to see the stress-strain results > from this simulation. I wonder what strain type (not component) is > available in /POST26 for this kind of material modeling? Elastic, plastic, > or else? Or, am I doing something wrong? Any advice would be greatly > appreciated! > > Thank you very much, > 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 > ===================================== > > > >

SM

Santhosh M

Thu, Aug 10, 2023 9:11 AM

Dear Prof,

TB,EXPE is meant to provide experimental stress strain data for Response Function material model for Hyperelastic materials.

Refer below video for more details.

https://youtu.be/ulRqLp6TPYw

The output of this material model is only elastic strain in True Stress Strain format. But the input stress strain should be in Engineering stress strain format.

Also, it is not possible to combine Hyper elastic model with Creep model, valid material combinations are given below

https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v232/en/ans_mat/elemmcpos050301.html

If you see a nonlinear stress strain curve for Sintered Silver, if there is some irrecoverable plastic strain, i doubt applicability of Response Function material model to model this material.

Regards,
Santhosh M

-----Original Message-----
From: Mohammad Gharaibeh via Xansys xansys-temp@list.xansys.org
Sent: Thursday, August 10, 2023 2:20 PM
To: XANSYS Mailing List Home xansys-temp@list.xansys.org
Cc: Mohammad Gharaibeh mgharai1@binghamton.edu
Subject: [Xansys] Re: What Strain to see when using Experimental data

[External Sender]

Well, let me try to rephrase my question.

Using ANSYS Classic APDL, I am performing a thermo-mechanical simulation of an electronic system with sintered silver as the die attach material. I am using experimental stress-strain data (at 3 temperatures) for modeling the silver. For defining its material model, I used the TB command with the options of EXPE and UNIAXIAL (and UNITENSION). The stress-strain data points are then defined using TBPT. Prior TBPT, Temperatures are set using TBTEMP. Please see the APDL snippet at the end of this email for more details.

I am doing this because I have fitted Norton Creep parameters (strain_rate = A * (stress^n) * exp(-Q/RT)) and want to compare between the actual test stress-strain data simulation results with those of this fitting empirical model. Does it make sense?

The model solved just fine and I want to see the stress-strain results from this simulation. There were no strain values stored except the "Elastic Strains". I believe plastic strains should be also available. Am I missing something? should I, at some point, define the initiation of plastic deformation in my material model definition? Please advise!

Best Regards,

Mohammad

APDL:

! Die Attach

MPTEMP,1,25,100,200

MPDATA,EX,2,1,61E3,53E3,49e3

MP,PRXY,2,0.28

MP,CTEX,2,21.7e-6

!

TB,expe,2,3,50,uniaxial ! Could be UNITENSION

TBTEMP,25 ! Define first temperature

!tbpt , , 0.000000 , 0.000000

tbpt , , 0.000280 , 17.794428

tbpt , , 0.000548 , 38.414079

tbpt , , 0.000938 , 63.728864

tbpt , , 0.001343 , 87.815119

tbpt , , 0.001721 , 107.134180

tbpt , , 0.002000 , 128.129020

tbpt , , 0.002255 , 145.976007

tbpt , , 0.002498 , 158.901011

tbpt , , 0.002824 , 176.915343

tbpt , , 0.003188 , 199.353776

tbpt , , 0.003590 , 224.233568

tbpt , , 0.004019 , 248.443674

tbpt , , 0.004445 , 269.039227

tbpt , , 0.004869 , 286.479704

tbpt , , 0.005337 , 310.925911

TBTEMP,100 ! Define second temperature

!tbpt , , 0.000000 , 0.000000

tbpt , , 0.001571 , 73.745654

tbpt , , 0.002005 , 100.639202

tbpt , , 0.002398 , 117.823746

tbpt , , 0.002894 , 140.088412

tbpt , , 0.002969 , 142.336910

tbpt , , 0.002979 , 142.243919

tbpt , , 0.003135 , 151.278902

tbpt , , 0.003891 , 198.233721

tbpt , , 0.004704 , 233.552649

tbpt , , 0.005568 , 264.700466

tbpt , , 0.006054 , 282.188126

tbpt , , 0.006365 , 292.063758

TBTEMP,200 ! Define third temperature

!tbpt , , 0.000000 , 0.000000

tbpt , , 0.001311 , 49.591660

tbpt , , 0.001723 , 67.973589

tbpt , , 0.002206 , 86.082534

tbpt , , 0.002670 , 99.968976

tbpt , , 0.003016 , 109.822132

tbpt , , 0.003361 , 116.975289

tbpt , , 0.003684 , 122.554393

tbpt , , 0.003876 , 127.105099

tbpt , , 0.004258 , 130.714321

tbpt , , 0.004336 , 133.297749

tbpt , , 0.004672 , 134.854808

tbpt , , 0.004738 , 135.597108

tbpt , , 0.005075 , 135.935566

tbpt , , 0.005196 , 136.365141

tbpt , , 0.005440 , 137.314378

tbpt , , 0.005550 , 139.029876

tbpt , , 0.005707 , 141.543198

tbpt , , 0.006137 , 144.719815

tbpt , , 0.006495 , 148.316230

tbpt , , 0.006940 , 151.872619

---====

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 Wed, Aug 9, 2023 at 8:09 PM Mohammad Gharaibeh <mgharai1@binghamton.edu mailto:mgharai1@binghamton.edu>

wrote:

Hello XANSYS Experts,

I am performing a thermo-mechanical simulation of a an electronic

system with sintered silver is the die attach material. I am using

experimental stress-strain data (at 3 temperatures). For defining the

sintered silver material model, I used TB command with the options of EXPE and UNITENSION.

The data points are then defined using TBPT. Prior TBPT, Temperatures

are set using TBTEMP.

The model solved just fine and I want to see the stress-strain results

from this simulation. I wonder what strain type (not component) is

available in /POST26 for this kind of material modeling? Elastic,

plastic, or else? Or, am I doing something wrong? Any advice would be

greatly appreciated!

Thank you very much,

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

---====

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Please send administrative requests such as deletion from XANSYS to xansys-mod@tynecomp.co.uk mailto:xansys-mod@tynecomp.co.uk and not to the list

Dear Prof, TB,EXPE is meant to provide experimental stress strain data for Response Function material model for Hyperelastic materials. Refer below video for more details. https://youtu.be/ulRqLp6TPYw The output of this material model is only elastic strain in True Stress Strain format. But the input stress strain should be in Engineering stress strain format. Also, it is not possible to combine Hyper elastic model with Creep model, valid material combinations are given below https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v232/en/ans_mat/elemmcpos050301.html If you see a nonlinear stress strain curve for Sintered Silver, if there is some irrecoverable plastic strain, i doubt applicability of Response Function material model to model this material. ------------------------------------- Regards, Santhosh M -----Original Message----- From: Mohammad Gharaibeh via Xansys <xansys-temp@list.xansys.org> Sent: Thursday, August 10, 2023 2:20 PM To: XANSYS Mailing List Home <xansys-temp@list.xansys.org> Cc: Mohammad Gharaibeh <mgharai1@binghamton.edu> Subject: [Xansys] Re: What Strain to see when using Experimental data [External Sender] Well, let me try to rephrase my question. Using ANSYS Classic APDL, I am performing a thermo-mechanical simulation of an electronic system with sintered silver as the die attach material. I am using experimental stress-strain data (at 3 temperatures) for modeling the silver. For defining its material model, I used the TB command with the options of EXPE and UNIAXIAL (and UNITENSION). The stress-strain data points are then defined using TBPT. Prior TBPT, Temperatures are set using TBTEMP. Please see the APDL snippet at the end of this email for more details. I am doing this because I have fitted Norton Creep parameters (strain_rate = A * (stress^n) * exp(-Q/RT)) and want to compare between the actual test stress-strain data simulation results with those of this fitting empirical model. Does it make sense? The model solved just fine and I want to see the stress-strain results from this simulation. There were no strain values stored except the "Elastic Strains". I believe plastic strains should be also available. Am I missing something? should I, at some point, define the initiation of plastic deformation in my material model definition? Please advise! Best Regards, Mohammad APDL: ! Die Attach MPTEMP,1,25,100,200 MPDATA,EX,2,1,61E3,53E3,49e3 MP,PRXY,2,0.28 MP,CTEX,2,21.7e-6 ! TB,expe,2,3,50,uniaxial ! Could be UNITENSION TBTEMP,25 ! Define first temperature !tbpt , , 0.000000 , 0.000000 tbpt , , 0.000280 , 17.794428 tbpt , , 0.000548 , 38.414079 tbpt , , 0.000938 , 63.728864 tbpt , , 0.001343 , 87.815119 tbpt , , 0.001721 , 107.134180 tbpt , , 0.002000 , 128.129020 tbpt , , 0.002255 , 145.976007 tbpt , , 0.002498 , 158.901011 tbpt , , 0.002824 , 176.915343 tbpt , , 0.003188 , 199.353776 tbpt , , 0.003590 , 224.233568 tbpt , , 0.004019 , 248.443674 tbpt , , 0.004445 , 269.039227 tbpt , , 0.004869 , 286.479704 tbpt , , 0.005337 , 310.925911 TBTEMP,100 ! Define second temperature !tbpt , , 0.000000 , 0.000000 tbpt , , 0.001571 , 73.745654 tbpt , , 0.002005 , 100.639202 tbpt , , 0.002398 , 117.823746 tbpt , , 0.002894 , 140.088412 tbpt , , 0.002969 , 142.336910 tbpt , , 0.002979 , 142.243919 tbpt , , 0.003135 , 151.278902 tbpt , , 0.003891 , 198.233721 tbpt , , 0.004704 , 233.552649 tbpt , , 0.005568 , 264.700466 tbpt , , 0.006054 , 282.188126 tbpt , , 0.006365 , 292.063758 TBTEMP,200 ! Define third temperature !tbpt , , 0.000000 , 0.000000 tbpt , , 0.001311 , 49.591660 tbpt , , 0.001723 , 67.973589 tbpt , , 0.002206 , 86.082534 tbpt , , 0.002670 , 99.968976 tbpt , , 0.003016 , 109.822132 tbpt , , 0.003361 , 116.975289 tbpt , , 0.003684 , 122.554393 tbpt , , 0.003876 , 127.105099 tbpt , , 0.004258 , 130.714321 tbpt , , 0.004336 , 133.297749 tbpt , , 0.004672 , 134.854808 tbpt , , 0.004738 , 135.597108 tbpt , , 0.005075 , 135.935566 tbpt , , 0.005196 , 136.365141 tbpt , , 0.005440 , 137.314378 tbpt , , 0.005550 , 139.029876 tbpt , , 0.005707 , 141.543198 tbpt , , 0.006137 , 144.719815 tbpt , , 0.006495 , 148.316230 tbpt , , 0.006940 , 151.872619 ===================================== 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 Wed, Aug 9, 2023 at 8:09 PM Mohammad Gharaibeh <mgharai1@binghamton.edu<mailto:mgharai1@binghamton.edu>> wrote: > > Hello XANSYS Experts, > > I am performing a thermo-mechanical simulation of a an electronic > system with sintered silver is the die attach material. I am using > experimental stress-strain data (at 3 temperatures). For defining the > sintered silver material model, I used TB command with the options of EXPE and UNITENSION. > The data points are then defined using TBPT. Prior TBPT, Temperatures > are set using TBTEMP. > > The model solved just fine and I want to see the stress-strain results > from this simulation. I wonder what strain type (not component) is > available in /POST26 for this kind of material modeling? Elastic, > plastic, or else? Or, am I doing something wrong? Any advice would be > greatly appreciated! > > Thank you very much, > 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 > ===================================== > > > > _______________________________________________ Xansys mailing list -- xansys-temp@list.xansys.org<mailto:xansys-temp@list.xansys.org> To unsubscribe send an email to xansys-temp-leave@list.xansys.org<mailto: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<mailto:xansys-mod@tynecomp.co.uk> and not to the list