Rubber material model development for closure bumpstop 2020-01-1073
Abstract: In vehicle development process, closures slam
durability is one of the important measurement for BIW &
closure design. In Closure slam simulation event, the majority of
dynamic forces absorbed through rubber seals and rubber bump-stops
which are typically mounted in-between the closure system and BIW.
These auxiliary components also provide the cushioning to the
structure and protect it from the panel interaction during abusive
closure slam. In conventional CAE Simulation process, the stiffness
of rubber bumpstop oftenly represented with linear stiffness data
which does not capture rubber behavior during loading and unloading
for both static and dynamic event. Thus, it provides an opportunity
to develop the numerical material model for better rubber behavior
simulation. This paper details the experimental testing of rubber
material coupons under different states of strain rate. The
generated hyper-elastic & viscoelastic material coefficient
from experimental test data are used to develop CAE material model
. This material model aids in simulating the rubber behavior more
accurately under varying strain rate for static and dynamic event.
This will further help in minimizing the overall product
development time and cost.