# Orthotropic ｍaterial support **URL:** \ **Category:** Feature Requests\ **Created:** [April 4, 2022, 4:51am UTC](https://prepomax.discourse.group/t/orthotropic-aterial-support/143 "2022-04-04T04:51:36Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![blueangel](https://avatars.discourse-cdn.com/v4/letter/b/97f17d/32.png) [@blueangel](https://prepomax.discourse.group/u/blueangel)\ **Post date:** [April 4, 2022, 4:51am UTC](https://prepomax.discourse.group/t/orthotropic-aterial-support/143/1 "2022-04-04T04:51:36Z")
Because ccx can support orthotropic materials, it would be great if PPM could support orthotropic materials, and it would be even more perfect if it could support composite materials. ---
**Author:** ![Kris](https://avatars.discourse-cdn.com/v4/letter/k/82dd89/32.png) [@Kris](https://prepomax.discourse.group/u/Kris)\ **Post date:** [April 12, 2022, 5:22am UTC](https://prepomax.discourse.group/t/orthotropic-aterial-support/143/2 "2022-04-12T05:22:07Z")
That would indeed be awesome. ---
**Author:** ![lotfi82](https://avatars.discourse-cdn.com/v4/letter/l/71c47a/32.png) [@lotfi82](https://prepomax.discourse.group/u/lotfi82)\ **Post date:** [May 4, 2022, 5:32am UTC](https://prepomax.discourse.group/t/orthotropic-aterial-support/143/3 "2022-05-04T05:32:00Z")
Indeed, I already asked for this. Material orientation is absolutely a great feature to implement. ---
**Author:** ![lotfi82](https://avatars.discourse-cdn.com/v4/letter/l/71c47a/32.png) [@lotfi82](https://prepomax.discourse.group/u/lotfi82)\ **Post date:** [May 4, 2022, 5:32am UTC](https://prepomax.discourse.group/t/orthotropic-aterial-support/143/4 "2022-05-04T05:32:45Z")
I have small experience in the subject. If you need help don’t hesitate ---
**Author:** ![blueangel](https://avatars.discourse-cdn.com/v4/letter/b/97f17d/32.png) [@blueangel](https://prepomax.discourse.group/u/blueangel)\ **Post date:** [May 6, 2022, 1:25am UTC](https://prepomax.discourse.group/t/orthotropic-aterial-support/143/5 "2022-05-06T01:25:25Z")
Thank you very much for your sugestion. I notice that ccx only support \*Element, Type=S8R, while PrePoMax only support Type=S8, which must be modified in the inp file. and can not modified in the PrePoMax. The other problem is for the \*Orientation，i don’t know how to model a double curved shell since the orientation always changed in different element. Do you have any good suggestions? ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [May 6, 2022, 7:09am UTC](https://prepomax.discourse.group/t/orthotropic-aterial-support/143/6 "2022-05-06T07:09:51Z")
Calcilix supports both, S8 and S8R elementes. In PrePoMax the selection can be done using the Part-\>Edit option: ![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/1X/01a480e12e74105eed7698fd0729e8d47621d9ff.png) ---
**Author:** ![massimo](https://avatars.discourse-cdn.com/v4/letter/m/7ba0ec/32.png) [@massimo](https://prepomax.discourse.group/u/massimo)\ **Post date:** [May 6, 2022, 8:21am UTC](https://prepomax.discourse.group/t/orthotropic-aterial-support/143/7 "2022-05-06T08:21:17Z")
Composite and Orthotropic material properties would be really great ---
**Author:** ![blueangel](https://avatars.discourse-cdn.com/v4/letter/b/97f17d/32.png) [@blueangel](https://prepomax.discourse.group/u/blueangel)\ **Post date:** [May 6, 2022, 8:32am UTC](https://prepomax.discourse.group/t/orthotropic-aterial-support/143/8 "2022-05-06T08:32:22Z")
Thanks a lot for your help. i got this function. i have made a composites shell analysis with Calculix Keywords in PPM and looks well. ![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/1X/231d411183a4c8e11f1b09db15add59714415871.png) ---
**Author:** ![massimo](https://avatars.discourse-cdn.com/v4/letter/m/7ba0ec/32.png) [@massimo](https://prepomax.discourse.group/u/massimo)\ **Post date:** [May 6, 2022, 9:49am UTC](https://prepomax.discourse.group/t/orthotropic-aterial-support/143/9 "2022-05-06T09:49:12Z")
Hello @blueangel, could you share your input file? Did you model a multi-layered laminate? How can you do this from PrePoMax? ---
**Author:** ![Kris](https://avatars.discourse-cdn.com/v4/letter/k/82dd89/32.png) [@Kris](https://prepomax.discourse.group/u/Kris)\ **Post date:** [May 17, 2022, 6:12pm UTC](https://prepomax.discourse.group/t/orthotropic-aterial-support/143/10 "2022-05-17T18:12:29Z")
To be able to define a local element COS for solids based on either a global cartesian or cylindrical COS would be fantastic. Even standalone, because one could examine stresses in directions that are relevant to a specific section of a design. If combined with orthotropic materials in a second step, even better. Because this would unlock composite analysis (actually any type material combination). Thirdly, one could implement material stacks per element. Enabling stacked composite brick elements. ---
**Author:** ![Kris](https://avatars.discourse-cdn.com/v4/letter/k/82dd89/32.png) [@Kris](https://prepomax.discourse.group/u/Kris)\ **Post date:** [July 23, 2022, 8:08pm UTC](https://prepomax.discourse.group/t/orthotropic-aterial-support/143/12 "2022-07-23T20:08:49Z")
@blueangel Could you share how you have accomplished this? Custom keywords? Would be highly appreciated. ---
**Author:** ![synt](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/synt/32/4658_2.png) [@synt](https://prepomax.discourse.group/u/synt)\ **Post date:** [July 23, 2022, 10:09pm UTC](https://prepomax.discourse.group/t/orthotropic-aterial-support/143/13 "2022-07-23T22:09:29Z")
hi, basic of layered shell (composite) can be found in official examples Reinforced concrete cantilever beam as shown below. ![img190](https://global.discourse-cdn.com/free1/uploads/prepomax/original/1X/70e7dcbf2d8cd5bd847ea6529adb24ee855a39a8.png) also you need a keyword `*Elastic,Type=Engineering Constants` for orthotropic materials and `*Orientation` to defined fiber axis. . best, ---
**Author:** ![blueangel](https://avatars.discourse-cdn.com/v4/letter/b/97f17d/32.png) [@blueangel](https://prepomax.discourse.group/u/blueangel)\ **Post date:** [September 27, 2022, 2:08pm UTC](https://prepomax.discourse.group/t/orthotropic-aterial-support/143/14 "2022-09-27T14:08:09Z")
[composite\_shell\_peek.inp](https://prepomax.discourse.group/uploads/short-url/tFEDJ8p6MXqBhcc7Mve00nI8fSn.inp) (8.4 KB) i made this by keywords! sorry for reply so late.