Abstract
Experimental design and computational model for predicting debonding initiation
and propagation are of interest of scientists and engineers. The design and model
are expected to explain the phenomenon for a wide range of loading rates. In this
work, a method to measure and quantify debonding strength at various loading rates
is proposed. The method is experimentally verified using data obtained from a static
test and a pulse-type dynamic test. The proposed method involves the cohesive zone
model, which can uniquely be characterized with a few parameters. Since those
parameters are difficult to be measured directly, indirect inference is deployed where
the parameters are inferred by minimizing discrepancy of mechanical response of
a numerical model and that of the experiments. The main finding suggests that the
design is easy to be used for the debonding characterization and the numerical model
can accurately predict the debonding for the both loading cases. The cohesive strength
of the stress-wave case is significantly higher than that of the static case; meanwhile,
the cohesive energy is twice larger.
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