Abstract
The mixed-mode fracture energies of copper–SAC305–copper solder joints were measured using both an Arcan-type specimen and a double-cantilever beam (DCB) specimen. The critical strain energy release rate, Jci, values obtained from Arcan-type specimens were in the range of 10–80J/m2, depending on the strain rate and phase angle of loading, while those obtained from DCB specimens were much higher, in the range of 380–2300J/m2. This large difference in the measured Jci values, which is consistent with the literature, was explained in terms of the stress distributions, constraint and plastic zone sizes in the solder layers in these two specimens.
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