  The hyperelastic materials would contribute to the intricacies of rough
surface contact, primarily due to the heightened nonlinearity caused by stress
concentration. In our previous research, an incremental contact model tailored
for hyperelastic materials is proposed and validated by finite element (FEM)
simulations. From an experimental perspective, this study employs an in-situ
optical interferometric technique to precisely document the actual contact zone
between hyperelastic solids and quartz glass. Simultaneously, the contact force
is meticulously recorded in sync by a force sensor positioned beneath the
hyperelastic samples. Comparing with the predictions of incremental contact
model for hyperelastic materials, a significant agreement becomes evident,
almost in a range of nearly complete contact. Its significance extends to
practical domains such as sealing mechanisms, leakage prevention, and
structural integrity, offering valuable insights for these applications.
