The objectives of this investigation are to propose novel
specimen designs to remove the stress singularity, and therefore
to provide reasonable interfacial strength measurements
and suppress edge debonding of dissimilar material joints.We
reviewthe origin of stress singularities, and we propose a general
solution inspired by the mechanics during formation of
trees, a biologically inspired design.18 Typical metal/polymer
joints will be selected for demonstration of the proposed new
design through an in situ photoelasticity experiment.