I am working on 3 point bending test on Glue Laminated Timber and I have modeled the adhesive as an interaction between two surfaces whose properties are defined as below(see attached picture), but I keep getting this(see attached picture) error. Also I don't have any accurate values for the properties of adhesives(Adhesive used is raldite AW 106). If someone could help me out in figuring the values or how to counter the given value would be highly appreciated. Thanking you in advance for your help
