Couple Stress Theory For Materials With Microstructures

Abstract

Classical continuum theory (CCT) provides a mathematical model to study the mechanical response of materials under external effects. In the context of CCT, there is no material length scale, and a solid body is sub-dividable into an infinitesimal element with the same behavior as the bulk material, disregarding the fact that all materials are made of building blocks and have microstructures in different length scales. The lack of material characteristic length-scale in CCT prevents it from recognizing any size-effect. Additionally, even order material property tensors associated with this theory can only characterize the centrosymmetric behavior

Inclined‐Strut Optimized Mechanical Metamaterials with Enhanced Compression–Torsion Conversion Efficiencies

“…As shown in Figure 4 g and 5 g, the corresponding theoretical calculations are derived based on the geometrical parameters of the finite‐element simulation and experiment under 5% axial strain. This article focuses on improving the performance of the unit cell, and the performance of the unit cell does affect the performance of the structure made of several unit cells; many research works [ 29–32 ] have confirmed this phenomenon. What's more, there are also many novel functions that are realized directly through the single unit.…”