FW: Calling all laminated composite structures analysts - Can I model a layered composite in a 2D plane stress model?
Hi All,
Not sure who to ask - so please excuse the broadcast message.
Looking to model some simple flanges (back-to-back) as 2D plane stress - PLANE42 elements (or 182's). I'm thinking of modeling each ply layer as a row of elements.
I'm a little stuck on the fact that with those elements I cannot change the element coordinate systems at will to orient a 45 degree woven fabric ply - where the fiber direction would be out of the element plane. The PLANE182 implies ESYS can be used but I've had no luck with ESYS or EMOD
Is there a different element type I should be using?
Another option I've considered is it I can get the physical properties (E PR G) of the fabric ply in the 45 degree direction and call that Ey. IN other words don't change the element coordinate system - change the Ex Ey Ez I input for the material.
Really trying to avoid going 3D with this problem - going 3D just to get ply by ply material property input seems overboard. Supporting some part shipments so the whole project is time sensitive.
Thanks in advance,
Dan Bohlen
Senior/ SSt Engineer, Stress Analyst
STAR review chairman, Cold Structures, Mounts, TRF
GE Aircraft Engines
1 Neumann Way
Evendale, OH 45215 USA
Build B90 Col. H5 cube BK35-251
M/D H358 Cell 513-917-3402 513-592-0678
"In God we trust, all others bring data." W Edwards Deming
For clarity - I am trying to do a plane stress with thickness model.
-----Original Message-----
From: Bohlen, Dan (GE Aviation, US) dan.bohlen@ge.com
Sent: Friday, July 9, 2021 7:12 AM
To: XANSYS Mailing List Home xansys-temp@list.xansys.org
Cc: xansys-mod@tynecomp.co.uk
Subject: EXT: [Xansys] FW: Calling all laminated composite structures analysts - Can I model a layered composite in a 2D plane stress model?
Hi All,
Not sure who to ask - so please excuse the broadcast message.
Looking to model some simple flanges (back-to-back) as 2D plane stress - PLANE42 elements (or 182's). I'm thinking of modeling each ply layer as a row of elements.
I'm a little stuck on the fact that with those elements I cannot change the element coordinate systems at will to orient a 45 degree woven fabric ply - where the fiber direction would be out of the element plane. The PLANE182 implies ESYS can be used but I've had no luck with ESYS or EMOD
Is there a different element type I should be using?
Another option I've considered is it I can get the physical properties (E PR G) of the fabric ply in the 45 degree direction and call that Ey. IN other words don't change the element coordinate system - change the Ex Ey Ez I input for the material.
Really trying to avoid going 3D with this problem - going 3D just to get ply by ply material property input seems overboard. Supporting some part shipments so the whole project is time sensitive.
Thanks in advance,
Dan Bohlen
Senior/ SSt Engineer, Stress Analyst
STAR review chairman, Cold Structures, Mounts, TRF GE Aircraft Engines
1 Neumann Way
Evendale, OH 45215 USA
Build B90 Col. H5 cube BK35-251
M/D H358 Cell 513-917-3402 513-592-0678
"In God we trust, all others bring data." W Edwards Deming
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Dan,
How do you know ESYS is not working? Are you using RSYS to plot results?
John Deibler
Pacific Northwest National Lab
"All models are wrong. Some models are useful"
-----Original Message-----
From: Bohlen, Dan (GE Aviation, US) dan.bohlen@ge.com
Sent: Friday, July 09, 2021 4:12 AM
To: XANSYS Mailing List Home xansys-temp@list.xansys.org
Cc: xansys-mod@tynecomp.co.uk
Subject: [Xansys] FW: Calling all laminated composite structures analysts - Can I model a layered composite in a 2D plane stress model?
Check twice before you click! This email originated from outside PNNL.
Hi All,
Not sure who to ask - so please excuse the broadcast message.
Looking to model some simple flanges (back-to-back) as 2D plane stress - PLANE42 elements (or 182's). I'm thinking of modeling each ply layer as a row of elements.
I'm a little stuck on the fact that with those elements I cannot change the element coordinate systems at will to orient a 45 degree woven fabric ply - where the fiber direction would be out of the element plane. The PLANE182 implies ESYS can be used but I've had no luck with ESYS or EMOD
Is there a different element type I should be using?
Another option I've considered is it I can get the physical properties (E PR G) of the fabric ply in the 45 degree direction and call that Ey. IN other words don't change the element coordinate system - change the Ex Ey Ez I input for the material.
Really trying to avoid going 3D with this problem - going 3D just to get ply by ply material property input seems overboard. Supporting some part shipments so the whole project is time sensitive.
Thanks in advance,
Dan Bohlen
Senior/ SSt Engineer, Stress Analyst
STAR review chairman, Cold Structures, Mounts, TRF GE Aircraft Engines
1 Neumann Way
Evendale, OH 45215 USA
Build B90 Col. H5 cube BK35-251
M/D H358 Cell 513-917-3402 513-592-0678
"In God we trust, all others bring data." W Edwards Deming
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
Hi Dan, we have used 42 for composite L-flange analysis (through the
thickness shear and tension investigations) before but I think there are
limitations. CSYS does work with plane42 with for example aatt,1,1,1,xx, or
CSYS and EMOD, and you can verify it by plotting the element CSYS (
/psym,csys,1). But this is only for in-the-plane of the element. We use this
to insure all elements have an consistent axis normal to the layers ( call
it X ) when for example laminated an L-flange ( two straights and a corner
radius). This becomes your through the thickness axis and the element Y and
the Z are your in-plane fiber directions. Then orthotropic properties are
input, what it seems like you are asking is to control the angle of the
layer in the YZ, but you cannot control a coordinate system in the Z with a
2d element. A fabric is best characterized with orthotropic properties, you
just need to develop those on the bias if it is laminates with the +/-45
going around the flange.
Kurt Jordan
JCI
242 Evergreen Ave.
Mill Valley, CA 94941
415-259-9000
-----Original Message-----
From: Bohlen, Dan (GE Aviation, US) dan.bohlen@ge.com
Sent: Friday, July 9, 2021 7:04 AM
To: XANSYS Mailing List Home xansys-temp@list.xansys.org
Cc: xansys-mod@tynecomp.co.uk
Subject: [Xansys] Re: FW: Calling all laminated composite structures
analysts - Can I model a layered composite in a 2D plane stress model?
For clarity - I am trying to do a plane stress with thickness model.
-----Original Message-----
From: Bohlen, Dan (GE Aviation, US) dan.bohlen@ge.com
Sent: Friday, July 9, 2021 7:12 AM
To: XANSYS Mailing List Home xansys-temp@list.xansys.org
Cc: xansys-mod@tynecomp.co.uk
Subject: EXT: [Xansys] FW: Calling all laminated composite structures
analysts - Can I model a layered composite in a 2D plane stress model?
Hi All,
Not sure who to ask - so please excuse the broadcast message.
Looking to model some simple flanges (back-to-back) as 2D plane stress -
PLANE42 elements (or 182's). I'm thinking of modeling each ply layer as a
row of elements.
I'm a little stuck on the fact that with those elements I cannot change the
element coordinate systems at will to orient a 45 degree woven fabric ply -
where the fiber direction would be out of the element plane. The PLANE182
implies ESYS can be used but I've had no luck with ESYS or EMOD
Is there a different element type I should be using?
Another option I've considered is it I can get the physical properties (E PR
G) of the fabric ply in the 45 degree direction and call that Ey. IN other
words don't change the element coordinate system - change the Ex Ey Ez I
input for the material.
Really trying to avoid going 3D with this problem - going 3D just to get ply
by ply material property input seems overboard. Supporting some part
shipments so the whole project is time sensitive.
Thanks in advance,
Dan Bohlen
Senior/ SSt Engineer, Stress Analyst
STAR review chairman, Cold Structures, Mounts, TRF GE Aircraft Engines
1 Neumann Way
Evendale, OH 45215 USA
Build B90 Col. H5 cube BK35-251
M/D H358 Cell 513-917-3402 513-592-0678
"In God we trust, all others bring data." W Edwards Deming
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
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