In this paper, the two state -integral is extended from macrofacture to nanodefect mechanics. The question as to why the -integral for a nanovoid or a soft nano-inclusion might be negative is clarified. It is concluded that the surface tension plays a dominant role in evaluating the -integral, whereas the surface Lamè constants yield much less influence than the surface tension. Their influence on the -integral for a nanovoid or a soft nano-inclusion could be neglected.
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.Copyright © 2010
by American Society of Mechanical Engineers
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