Dear community,
I am writing to you to get your advice on modelling elastomers with SIMULIA using hyperelastic models.
Here are a few points to help you understand my problem:
I work more and more often with elastomer materials for different applications, and I have received several tips/methods from different sources in order to ‘facilitate’ the convergence of my models using a hyperlastic model. However, most of the time I find it difficult to achieve certain strain rates in compression.
I have tried to carry out sensitivity studies on: the geometry, the Hyper model used, the size of my elements, the type of my elements (linear, hybrid and reduced integration), but I have stuck with static modelling and I have not found any parameterisation/way of doing things that would allow me to achieve my expected results.
Above 20-30% compression strain I can't get most of my models to converge, even though physically I know that these parts can accept higher strain rates.
Do you have any advice on how to facilitate this convergence?
I can have illustrations for a simplified case study, but representative of the parts I study most of the time.
That is to say: a layer of unconfined elastomer bonded to two metal parts. What can change is the shape of the elastomer, which is not rectangular, but can have a more complex geometry (i need to work with 3D model, because it's not axisymetric part)
EXAMPLE:
Parts --> Metal parts = Rigid body / Elastomer part = Deformable
Element type --> C3D8RH
Contact --> Tie + General contact with default contact properties
Material --> Mooney Rivlin C10=0.445 / C01=-0.016 / D1=1E-9 (The webinar ‘Spaghetti, Hockeypucks, and Infinity squared’ by Dr. -Ing Axel REICHERT advises against using MR, but I haven't seen much improvement with a Neo-Hooke model are not representative for large strains)
