# Difference in results creo vs PPM **URL:** \ **Category:** General Questions\ **Created:** [October 15, 2024, 5:05pm UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085 "2024-10-15T17:05:56Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Michal](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Michal](https://prepomax.discourse.group/u/Michal)\ **Post date:** [October 15, 2024, 5:05pm UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/1 "2024-10-15T17:05:56Z")
![1258](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/2/2ec69052ec9cad005b20e96a536c09262601156c.jpeg) Dear All I can not find where is mistake. When compare quuite easy structure which was done in creo simulate and PPM. Bonduary conditions identical, load identical material identical steel linear eleastic but result difference is significant. ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [October 15, 2024, 5:08pm UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/2 "2024-10-15T17:08:31Z")
What about the mesh ? Can you share the .pmx file ? ---
**Author:** ![Michal](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Michal](https://prepomax.discourse.group/u/Michal)\ **Post date:** [October 15, 2024, 5:14pm UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/3 "2024-10-15T17:14:30Z")
size of pmx file is too big ---
**Author:** ![Michal](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Michal](https://prepomax.discourse.group/u/Michal)\ **Post date:** [October 15, 2024, 5:20pm UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/4 "2024-10-15T17:20:55Z")
> **[Google Drive: Sign-in](https://accounts.google.com/v3/signin/identifier?continue=https%3A%2F%2Fdrive.google.com%2Ffile%2Fd%2F1YHaqBnTkIA0gUnm1eKBdWb7qSwGJoJ7Q%2Fview%3Fusp%3Ddrive_link&followup=https%3A%2F%2Fdrive.google.com%2Ffile%2Fd%2F1YHaqBnTkIA0gUnm1eKBdWb7qSwGJoJ7Q%2Fview%3Fusp%3Ddrive_link&ifkv=ARpgrqeqYZcLxSRgVKO33itqB2J6XMQZQfvJ1BWOFZTRRdPzLN5YvTilCg0eBlxS-VFUpUV8H-SZhw&osid=1&passive=1209600&service=wise&flowName=GlifWebSignIn&flowEntry=ServiceLogin&dsh=S-1070991800%3A1729012780592721&ddm=0)** > > Access Google Drive with a Google account (for personal use) or Google Workspace account (for business use). ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [October 15, 2024, 6:35pm UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/5 "2024-10-15T18:35:14Z")
You have to change access to “Anyone with the link” first then copy the link again and paste it here. ---
**Author:** ![Michal](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Michal](https://prepomax.discourse.group/u/Michal)\ **Post date:** [October 15, 2024, 6:49pm UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/6 "2024-10-15T18:49:46Z")
> **[saddle\_Lieven.pmx](https://drive.google.com/file/d/1YHaqBnTkIA0gUnm1eKBdWb7qSwGJoJ7Q/view?usp=sharing)** > > Google Drive file. ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [October 15, 2024, 7:02pm UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/7 "2024-10-15T19:02:18Z")
Those are just the results without the setup ? ---
**Author:** ![Michal](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Michal](https://prepomax.discourse.group/u/Michal)\ **Post date:** [October 15, 2024, 7:15pm UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/8 "2024-10-15T19:15:15Z")
strange pmx should contain geometry and FE model with bondary conditions applied forces and so on ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [October 15, 2024, 7:18pm UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/9 "2024-10-15T19:18:55Z")
Try opening it on your side. It looks like only the .frd file with CalculiX results was opened and then the file was saved. ---
**Author:** ![Michal](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Michal](https://prepomax.discourse.group/u/Michal)\ **Post date:** [October 15, 2024, 7:32pm UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/10 "2024-10-15T19:32:12Z")
I will try tomorrow , since now I have no access to source file best regards ---
**Author:** ![Michal](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Michal](https://prepomax.discourse.group/u/Michal)\ **Post date:** [October 16, 2024, 6:26am UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/11 "2024-10-16T06:26:40Z")
> **[saddlerev2.pmx](https://drive.google.com/file/d/1hFkoKctg4zdk5F_hrUqwimoDFbh_FEju/view?usp=sharing)** > > Google Drive file. ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [October 16, 2024, 9:46am UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/12 "2024-10-16T09:46:51Z")
The setup looks good (if around 180 t is correct loading). The only problem is that the U3=0 boundary condition is causing stress concentration in that small area. But your question is about the difference between 2 solvers. I have an impression that the mesh in Creo Simulate is much more dense and thus the stress peaks you have jump due to singularity. Can you show the mesh from Creo and check the number of nodes and elements there ? Did you compare the displacements too ? ---
**Author:** ![Michal](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Michal](https://prepomax.discourse.group/u/Michal)\ **Post date:** [October 16, 2024, 10:01am UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/13 "2024-10-16T10:01:07Z")
![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/d/def96244c672f6faf2a84af989ad29e5ce9acb59.jpeg) ---
**Author:** ![Michal](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Michal](https://prepomax.discourse.group/u/Michal)\ **Post date:** [October 16, 2024, 10:04am UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/14 "2024-10-16T10:04:10Z")
![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/c/cc7b4013d5cfc118a5dcca45676796a7a8cfe7c8.jpeg) ---
**Author:** ![Michal](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Michal](https://prepomax.discourse.group/u/Michal)\ **Post date:** [October 16, 2024, 10:14am UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/15 "2024-10-16T10:14:49Z")
Creo simulate uses p-element method vs h-element method in most of solvers so overall look for mesh in creo might seem very coarse , but is ok ---
**Author:** ![Michal](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Michal](https://prepomax.discourse.group/u/Michal)\ **Post date:** [October 16, 2024, 10:16am UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/16 "2024-10-16T10:16:55Z")
I can not reproduce this problem in other commercial solvers than creo to compare results best regards ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [October 16, 2024, 10:45am UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/17 "2024-10-16T10:45:34Z")
It seems to be a matter of the mesh (especially if displacements roughly agree). If you start refining locally where the stress concentrations are, you may see such high values in PrePoMax too. I don’t have experience with p-FEM so it’s hard for me to judge whether that mesh in Creo is good enough and I’ll just assume that it’s ok, as you said. ---
**Author:** ![Michal](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Michal](https://prepomax.discourse.group/u/Michal)\ **Post date:** [October 16, 2024, 10:59am UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/18 "2024-10-16T10:59:12Z")
Have you got possibility to check in other software than mentioned ? We use creo simulate and so far there were no problems with results accuracy best regards ---
**Author:** ![Michal](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Michal](https://prepomax.discourse.group/u/Michal)\ **Post date:** [October 16, 2024, 11:14am UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/19 "2024-10-16T11:14:50Z")
but for second order elements mesh quality and dense of quality play secondary role . ---
**Author:** ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)\ **Post date:** [October 16, 2024, 11:24am UTC](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085/20 "2024-10-16T11:24:31Z")
Why are there some arrows on top pointing in diferent directions? ![imagen](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/9/94ee7b41faa2db349c8d2a281f6e1eab68b4995e.jpeg) [Next page](https://prepomax.discourse.group/t/difference-in-results-creo-vs-ppm/2085.md?page=2)