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<\/a><\/p>\nHowever, there have been a lot of convergence problems. I’ve tried changing to displacement instead of aplying force as it is easier to converge, and it did do the trick for a smaller amount of displacement (0.55 mm), however as I ramped those values up the problems reapeared. The displacement is ramped in 200 steps from 0 to 1 mm (ideally I would do for 1.2+ mm to see the maximum strenght of the bond), with 100 min substeps and 1000 max substeps. Don’t know if that’s too much, but it’s more of desparation…<\/p>\n I’m using bonded contact on both faces, so CFRP to Adhesive and Aluminium to Adhesive, with pure penalty formulation. I’ve changed the stiffness factor but it didn’t help.<\/p>\n <\/p>\n For the materials I’m using CFRP and non-linear aluminium from the Engineering database, the adhesive has data from the manufacturer, Both contact surfaces have a fracture input for contact debonding with a CZM that I inputed as well based on previous experiments. I’ve made a command to try and insert my stiffness value for the contact itself, but it caused more problems than not.<\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n