Abstract The strength of polycrystal increases as the grain diameter l decreases, i.e. Hall–Petch behaviour. This trend reverses at about 3 < 15 nm, inverse-Hall–Petch How size affects material’s nm (~12 particles) remains unclear. Here our simulations use mixtures soft and hard particles so that compression can continuously reduce to merely a few particles, resulting in ultrafine-grained so...

Basalt fiber is an eco-friendly and a promising material for the strengthening of reinforced concrete (RC) structures due to its various advantages such as low cost, better resistance chemical attack, good thermal characteristics higher tensile strength than E-glass fiber. However, only few experimental investigations have been reported in literature on RC beams with basalt polymer (BFRP) compo...