Effects of laminate misalignment on elastic–viscoplastic properties of ultrafine plate–fin structures: analysis using time dependent homogenisation theory

摘要

In this study, the elastic–viscoplastic properties of ultrafine plate–fin structures with laminatenmisalignment are investigated using the time dependent homogenisation theory. For this, it is firstnshown that, even though plate–fin structures have laminate misalignment, the distribution ofnperturbed velocity in the structures possesses periodicity. It is further shown that, by employingnthis periodicity as a boundary condition for unit cell analysis, a rectangular unit cell defined for anplate–fin structure without laminate misalignment can also be used as the analysis domain fornplate–fin structures with laminate misalignment. The present method is then applied to the elastic–nviscoplastic analysis of ultrafine plate–fin structures made of a Ni based alloy, subjected tonuniaxial tension at high temperatures. Four cases of laminate misalignments are considered in thenanalysis. It is shown that the laminate misalignment can significantly affect the elastic–viscoplasticnproperties of the plate–fin structures.