# Metallic connection: bolt stresses **URL:** \ **Category:** General Questions\ **Created:** [March 13, 2024, 12:54pm UTC](https://prepomax.discourse.group/t/metallic-connection-bolt-stresses/1601 "2024-03-13T12:54:44Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Agazzotti](https://avatars.discourse-cdn.com/v4/letter/a/3da27b/32.png) [@Agazzotti](https://prepomax.discourse.group/u/Agazzotti)\ **Post date:** [March 13, 2024, 12:54pm UTC](https://prepomax.discourse.group/t/metallic-connection-bolt-stresses/1601/1 "2024-03-13T12:54:44Z")
HI in the attached example I ask where I can get the stresses on the bolts The structure is symmetrical and loaded symmetrically so the result must be equal to: Fz (F3) = 10’000 N/4 = 2’500 N. I don’t understand how I can read the result. I tried to read the F3 Forces on the contact surface between the hole and the bolt but I get a zero value. Thank you ![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/5/5218609093948ac748bc25b1d27fdf6004977b32.png) Link: [WeTransfer - Send Large Files & Share Photos Online - Up to 2GB Free](https://we.tl/t-dKBxM0pCUz) ---
**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:** [March 13, 2024, 1:10pm UTC](https://prepomax.discourse.group/t/metallic-connection-bolt-stresses/1601/2 "2024-03-13T13:10:25Z")
FORC output is just for the reaction/applied forces so it’s non-zero only where BCs and loads are. If you want to read the forces from bolts modeled as solids then you can use e.g. `*SECTION PRINT`. It’s not supported in PrePoMax though so you would need keyword edits and internal surface for each bolt. More about this here: [Best way to find force in bolted connection](https://prepomax.discourse.group/t/best-way-to-find-force-in-bolted-connection/1498) ---
**Author:** ![Gunnar](https://avatars.discourse-cdn.com/v4/letter/g/ed655f/32.png) [@Gunnar](https://prepomax.discourse.group/u/Gunnar)\ **Post date:** [March 13, 2024, 9:00pm UTC](https://prepomax.discourse.group/t/metallic-connection-bolt-stresses/1601/3 "2024-03-13T21:00:17Z")
I changed a few things in your file, see attached. [Mont\_Linea\_Vita-modi.pmx](https://prepomax.discourse.group/uploads/short-url/9Hez0LfzKb3fvzYL3xGaCrTF9DA.pmx) (1.9 MB) ![mod](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/f/f92e00f05e624ef3d2020a3cc0ed001fc87203eb.png) @Matej, after starting the analysis, this warning appears (because i deleted some contact pairs previously). The problem is that this list can become so long that it’s no longer possible to confirm the message. Can this warning be deactivated please? ![list](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/2/213bbdc72d3be3cd7b591ca1b68472c6af4bbe6e.png) ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [March 13, 2024, 9:54pm UTC](https://prepomax.discourse.group/t/metallic-connection-bolt-stresses/1601/4 "2024-03-13T21:54:42Z")
I was made aware of this “long error report” recently. So I will try to fix it. But I would like tofind out the reason why this happened in the first place. Can you recreate the problem? ---
**Author:** ![Gunnar](https://avatars.discourse-cdn.com/v4/letter/g/ed655f/32.png) [@Gunnar](https://prepomax.discourse.group/u/Gunnar)\ **Post date:** [March 14, 2024, 6:41am UTC](https://prepomax.discourse.group/t/metallic-connection-bolt-stresses/1601/5 "2024-03-14T06:41:32Z")
I was wrong, the compression only constraint leads to this warning. To recreate the problem, define a compression only constraint. Then delete the part and create a new mesh. It seems that some informations/internal selections of this constraint remains and will not be completely deleted with the part. ![Animation24](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/f/fed4bab84e2169a289ea88477a6743cca7f256cb.gif) ---
**Author:** ![Agazzotti](https://avatars.discourse-cdn.com/v4/letter/a/3da27b/32.png) [@Agazzotti](https://prepomax.discourse.group/u/Agazzotti)\ **Post date:** [March 15, 2024, 12:15pm UTC](https://prepomax.discourse.group/t/metallic-connection-bolt-stresses/1601/6 "2024-03-15T12:15:38Z")
Problem solved. Thanks for the replies