Abstract
Changes in microvoid size on ductile fracture surfaces under varying experimental conditions can arise in several ways. An analysis is developed here for the case in which an altered density of microvoid nuclei, expressed as the volume fraction of nucleation of microvoids, is the sole reason for size changes. The analysis is based on the concept that an altered nucleation density can be regarded as an alteration in the effective volume fraction of nuclei. The analysis is shown to agree with the form of available experimental data. Although more detailed experiments are necessary before a complete comparison can be made, the physical rationale presented appears qualitatively correct, and selfconsistent.
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