Hi there, thanks for kindly supporting the use and development of the Calculix. I have been re-directed here from github.
I have recently assembled an model with the beam-to-solid contact. The explicit solver seems produce unreasonable results that the energy raised to the INF level at some stage.
The load case is simple that
- the cellular body (consisting many beam elements) sits on the top of the bottom supporting plate
- the top loading plate moved downward to compress the cellular body. The top plate can only move in the vertical direction, and were constraint by the imposed boundary conditions.
- the cellular body has no other movement constraint, besides the contacts to the top and bottom plates.
I have attached zip files here, both the INP files and the results outputs. I do understand the the “beam” is not actual beam element, so the top and bottom plates were offset a bit (0.25mm) in order to accommodate the reproduced solids from the beams. The solver versions are 2.16 and 2.15.
I’d like to also confirm one thing, whether the "*tie " keywords were implemented for the explicit solver. I found it was not implemented.
You may see the attached models and results at: