This includes Young's modulus, Poisson's ratio, unit weight, and element length, as well as depth and pillar sizes.
Physical properties of extrudates were measured including radial expansion ratio, unit density, bulk density, and water absorption index.
The properties studied were radial expansion ratio, unit density, bulk spring index, bulk compressibility and Young's modulus.
Type Specific gravity Fineness modulus Absorption ratio Unit weight (kg/m2) 0.08 mm sieve passing Fine aggregate 2.57 2.7 1.83 1,470 1.8 Coarse aggregate 2.63 6.9 0.62 1,577 0.3 Table 4 Physical properties of chemical admixture.
The effect of superposed tensile or compressive stresses is found to be bigger for high aspect ratio unit cells than for low aspect ratios.
For high aspect ratio unit cells a clear localization band is found inside the cell, which actually represents several parallel bands, due to periodicity.
At the end of the curing period, the permeable pore space volume, water absorption ratio, unit volume weight, capillarity ratio, impermeability, compressive strength, static modulus of elasticity, Poisson's ratio and tensile strength values of the concrete samples were determined.
Regarding the non-acoustic performance, the physical (open void ratio, unit weight), mechanical (compressive strength, Young's modulus, flexural strength, fracture energy, indirect tensile strength, characteristic length, impact strength) and fire resistance properties were determined.
The performance of the proposed scheme is illustrated through two benchmark examples where a negative-Poisson's-ratio unit cell pattern, and a stiff and light inner structure are mapped to 3D free-form surfaces and fabricated through additive manufacturing.
In the materials represented by a low aspect ratio unit cell localization would also occur after that the maximum shear stress has been passed, but this is not shown when periodicity is enforced.
