On the competition for ultimately stiff and strong architected materials
نویسندگان
چکیده
Advances in manufacturing techniques may now realize virtually any imaginable microstructures, paving the way for architected materials with properties beyond those found nature. This has lead to a quest closing gaps property-space by carefully designed metamaterials. Development of mechanical metamaterials gone from open truss lattice structures closed plate stiffness close theoretical bounds. However, optimally stiff and strong is complex. Plate have higher (yield) strength but are prone buckling at low volume fractions. Hence here, still be optimal. To make things more complicated, hollow trusses or structural hierarchy bring closed-walled microstructures back competition. Based on analytical numerical studies common literature, we provide order interpolation schemes their effective (buckling) strength. Furthermore, case study based multi-property Ashby charts weight-optimal porous beams under bending, that demonstrates intricate interplay between structure microarchitecture plays key role design ultimate load carrying structures. The provided also used account microstructural yield multiscale optimization schemes.
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ژورنال
عنوان ژورنال: Materials & Design
سال: 2021
ISSN: ['1873-4197', '0264-1275']
DOI: https://doi.org/10.1016/j.matdes.2020.109356