Abstract
Homogenization analysis of lamellar composites consisting of elastic and elastic-plastic layers is performed using a discrete dislocation plasticity approach.Plastic size effects are caused by dislocation pile-ups at interfaces.It is shown that the strain hardening in elastic-plastic layers arises depending on the thickness of elastic layers as well as the gap between slip planes in adjacent elastic-plastic layers.In a case where the thickness of elastic layers is several dozen nm,the strain hardening in elastic-plastic layers reduces as the gap of the slip planes decreases.It is found that this effect is attributed to the long range stress due to the pile-ups in adjacent elastic-plastic layers.
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