  We analyze a two-dimensional spring network model comprising breakable and
unbreakable springs. Computer simulations showed this system to exhibit
intermittent stress drops in a larger strain regime, and these stress drops
resulted in ductile-like behavior. The scaling analysis reveals that the
avalanche size distribution demonstrates a cut-off, depending on its internal
structure. This study also investigates the relationship between cluster growth
and stress drop, and we show that the amount of stress drop increases in terms
of power law, corresponding to crack growth. The crack length distribution also
demonstrates a cut-off depending on its internal structure. The results show
that both the cluster growth-stress drop relationship and the crack size
distribution are scaled by the quantity related to the internal structure, and
the relevance of the exponent that scales the cluster growth-stress drop
relationship to the exponent that scales crack size distribution is verified.
