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Weird Piezo-analysis results after changing Unit Systems
 
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minghao.nie
User


Joined: 09 May 2012
Posts: 4

PostPosted: Mon Apr 07, 2014 5:33 am  Reply with quote

Hi Everybody,

Recently I ran a piezo-electric static simulation using Solid226:
At first I used the SI units setting and I get nothing in post-processor(I mean, the solver gives no error and warning, but the structure didn't have any displacements);
Then I simply changed every material properties and geometries(I have geometries arond 200 microns, which means I have to input geometries like "200e-6" under SI units) into uMKSV, and nothing else is changed, then the simulation works pretty well.

Though the results seems satisfying, I'm still confused and curious about the reason why this thing happens. Is there anyone who can put a light on my confusions?

---------------
Minghao Nie
Peking University
Institute of MicroElectronics
MEMS Center

email: truman.gyro@pku.edu.cn
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ayo.brimmo
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Joined: 01 Jul 2013
Posts: 38
Location: Masdar City, Abu Dhabi

PostPosted: Mon Apr 07, 2014 6:39 am  Reply with quote

Perhaps your load was too small to give any displacement in the first run. Punching a rock with your fist wouldn't give any displacement but try replacing the rock with someone's face. Get it?


Best,
Ayo Brimmo
Masdar, UAE

-----Original Message-----
From: Xansys [mailto:xansys-bounces@xansys.org] On Behalf Of minghao.nie
Sent: 07 April 2014 16:34
To: xansys@xansys.org
Subject: [Xansys] Weird Piezo-analysis results after changing Unit Systems

Hi Everybody,

Recently I ran a piezo-electric static simulation using Solid226:
At first I used the SI units setting and I get nothing in post-processor(I mean, the solver gives no error and warning, but the structure didn't have any displacements); Then I simply changed every material properties and geometries(I have geometries arond 200 microns, which means I have to input geometries like "200e-6" under SI units) into uMKSV, and nothing else is changed, then the simulation works pretty well.

Though the results seems satisfying, I'm still confused and curious about the reason why this thing happens. Is there anyone who can put a light on my confusions?

---------------
Minghao Nie
Peking University
Institute of MicroElectronics
MEMS Center

email: truman.gyro@pku.edu.cn






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Ayo Brimmo
Research Engineer
Masdar Institute of Science and Technology
UAE.
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Ing. Ivan Gajdoš, PhD.
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PostPosted: Mon Apr 07, 2014 6:42 am  Reply with quote

Hi

can you pls unsubscribe me from mailing list and from Xansys forum?

thx

*Ing. Ivan Gajdoš, PhD.*
*Technická Univerzita v Košiciach*
Technical university of Košice
*Strojnícka fakulta*
Faculty of mechanical engineering
*Katedra technológií a materiálov*
Department of technologies and materials
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tel: +421-55-602-3518
fex: +421-55-622-5186
skype: ivan.gajdos
Dn(a 7. 4. 2014 15:38 Ayoola Brimmo wrote / napísal(a):
Quote:
Perhaps your load was too small to give any displacement in the first run. Punching a rock with your fist wouldn't give any displacement but try replacing the rock with someone's face. Get it?


Best,
Ayo Brimmo
Masdar, UAE

-----Original Message-----
From: Xansys [mailto:xansys-bounces@xansys.org] On Behalf Of minghao.nie
Sent: 07 April 2014 16:34
To: xansys@xansys.org
Subject: [Xansys] Weird Piezo-analysis results after changing Unit Systems

Hi Everybody,

Recently I ran a piezo-electric static simulation using Solid226:
At first I used the SI units setting and I get nothing in post-processor(I mean, the solver gives no error and warning, but the structure didn't have any displacements); Then I simply changed every material properties and geometries(I have geometries arond 200 microns, which means I have to input geometries like "200e-6" under SI units) into uMKSV, and nothing else is changed, then the simulation works pretty well.

Though the results seems satisfying, I'm still confused and curious about the reason why this thing happens. Is there anyone who can put a light on my confusions?

---------------
Minghao Nie
Peking University
Institute of MicroElectronics
MEMS Center

email: truman.gyro@pku.edu.cn






+-------------------------------------------------------------+
| XANSYS web - www.xansys.org/forum |
| The Online Community for users of ANSYS, Inc. Software |
| Hosted by PADT - www.padtinc.com |
| Send administrative requests to xansys-mod@tynecomp.co.uk |
+-------------------------------------------------------------+
+-------------------------------------------------------------+
| XANSYS web - www.xansys.org/forum |
| The Online Community for users of ANSYS, Inc. Software |
| Hosted by PADT - www.padtinc.com |
| Send administrative requests to xansys-mod@tynecomp.co.uk |
+-------------------------------------------------------------+

+-------------------------------------------------------------+
| XANSYS web - www.xansys.org/forum |
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| Hosted by PADT - www.padtinc.com |
| Send administrative requests to xansys-mod@tynecomp.co.uk |
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bhaumik.dave
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Joined: 11 Dec 2013
Posts: 13
Location: Ahmedabad

PostPosted: Tue Apr 08, 2014 10:45 pm  Reply with quote

What is your piezoelectric matrix properties? D31,D32 and D33.

Regards,
Bhaumik

-----Original Message-----
From: Xansys [mailto:xansys-bounces@xansys.org] On Behalf Of minghao.nie
Sent: Monday, April 07, 2014 6:04 PM
To: xansys@xansys.org
Subject: [Xansys] Weird Piezo-analysis results after changing Unit Systems

Hi Everybody,

Recently I ran a piezo-electric static simulation using Solid226:
At first I used the SI units setting and I get nothing in post-processor(I
mean, the solver gives no error and warning, but the structure didn't have
any displacements); Then I simply changed every material properties and
geometries(I have geometries arond 200 microns, which means I have to input
geometries like "200e-6" under SI units) into uMKSV, and nothing else is
changed, then the simulation works pretty well.

Though the results seems satisfying, I'm still confused and curious about
the reason why this thing happens. Is there anyone who can put a light on my
confusions?

---------------
Minghao Nie
Peking University
Institute of MicroElectronics
MEMS Center

email: truman.gyro@pku.edu.cn






+-------------------------------------------------------------+
| XANSYS web - www.xansys.org/forum |
| The Online Community for users of ANSYS, Inc. Software |
| Hosted by PADT - www.padtinc.com |
| Send administrative requests to xansys-mod@tynecomp.co.uk |
+-------------------------------------------------------------+


+-------------------------------------------------------------+
| XANSYS web - www.xansys.org/forum |
| The Online Community for users of ANSYS, Inc. Software |
| Hosted by PADT - www.padtinc.com |
| Send administrative requests to xansys-mod@tynecomp.co.uk |
+-------------------------------------------------------------+

Post generated using Mail2Forum (http://www.mail2forum.com)
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minghao.nie
User


Joined: 09 May 2012
Posts: 4

PostPosted: Wed Apr 09, 2014 12:11 am  Reply with quote

Hi, It's 0,0,15.78.

---------------
Minghao Nie
Peking University
Institute of MicroElectronics
MEMS Center



bhaumik.dave wrote:
What is your piezoelectric matrix properties? D31,D32 and D33.

Regards,
Bhaumik

-----Original Message-----
From: Xansys [mailto:xansys-bounces@xansys.org] On Behalf Of minghao.nie
Sent: Monday, April 07, 2014 6:04 PM
To: xansys@xansys.org
Subject: [Xansys] Weird Piezo-analysis results after changing Unit Systems

Hi Everybody,

Recently I ran a piezo-electric static simulation using Solid226:
At first I used the SI units setting and I get nothing in post-processor(I
mean, the solver gives no error and warning, but the structure didn't have
any displacements); Then I simply changed every material properties and
geometries(I have geometries arond 200 microns, which means I have to input
geometries like "200e-6" under SI units) into uMKSV, and nothing else is
changed, then the simulation works pretty well.

Though the results seems satisfying, I'm still confused and curious about
the reason why this thing happens. Is there anyone who can put a light on my
confusions?

---------------
Minghao Nie
Peking University
Institute of MicroElectronics
MEMS Center

email: truman.gyro@pku.edu.cn






+-------------------------------------------------------------+
| XANSYS web - www.xansys.org/forum |
| The Online Community for users of ANSYS, Inc. Software |
| Hosted by PADT - www.padtinc.com |
| Send administrative requests to xansys-mod@tynecomp.co.uk |
+-------------------------------------------------------------+


+-------------------------------------------------------------+
| XANSYS web - www.xansys.org/forum |
| The Online Community for users of ANSYS, Inc. Software |
| Hosted by PADT - www.padtinc.com |
| Send administrative requests to xansys-mod@tynecomp.co.uk |
+-------------------------------------------------------------+

Post generated using Mail2Forum (http://www.mail2forum.com)
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