With the increasing use of metal foams in various engineering applications, investigation of their dynamic behaviour under varying strain rate is necessary. Closed cell aluminium fly ash foam developed through liquid ...With the increasing use of metal foams in various engineering applications, investigation of their dynamic behaviour under varying strain rate is necessary. Closed cell aluminium fly ash foam developed through liquid metallurgy route was investigated for its stress--strain behaviour at different strain rates ranging from 700 s^-1 to 1950 s^-1. The numerical model of split Hopkinson pressure bar （SHPB） was simulated using commercially available finite element code Abaqus/Explicit. Validation of numerical simulation was carried out using available experimental and numerical results. Full scale stress--strain curves wez＇e developed for various strain rates to study the effect of strain rate on compressive strength and energy absorption. The results showed that the closed cell aluminium fly ash foam is sensitive to strain rate.展开更多
This study analyses 26.5 Ma record of deep-sea benthic foraminifera from 194 samples from Ocean Drilling Program Hole 757B(latitude 17°01.458'S,longitude 88°10.899'E,water depth of 1652.1 m)located o...This study analyses 26.5 Ma record of deep-sea benthic foraminifera from 194 samples from Ocean Drilling Program Hole 757B(latitude 17°01.458'S,longitude 88°10.899'E,water depth of 1652.1 m)located on the Ninetyeast Ridge,southeastern Indian Ocean below equatorial divergence zone.The data document important changes in benthic foraminiferal population at Hole 757B since the late Oligocene.展开更多
文摘With the increasing use of metal foams in various engineering applications, investigation of their dynamic behaviour under varying strain rate is necessary. Closed cell aluminium fly ash foam developed through liquid metallurgy route was investigated for its stress--strain behaviour at different strain rates ranging from 700 s^-1 to 1950 s^-1. The numerical model of split Hopkinson pressure bar （SHPB） was simulated using commercially available finite element code Abaqus/Explicit. Validation of numerical simulation was carried out using available experimental and numerical results. Full scale stress--strain curves wez＇e developed for various strain rates to study the effect of strain rate on compressive strength and energy absorption. The results showed that the closed cell aluminium fly ash foam is sensitive to strain rate.
基金for the financial support(No.24(0256)/02/EMR-Ⅱ)for providing independent Junior Research Fellowship to RKS.
文摘This study analyses 26.5 Ma record of deep-sea benthic foraminifera from 194 samples from Ocean Drilling Program Hole 757B(latitude 17°01.458'S,longitude 88°10.899'E,water depth of 1652.1 m)located on the Ninetyeast Ridge,southeastern Indian Ocean below equatorial divergence zone.The data document important changes in benthic foraminiferal population at Hole 757B since the late Oligocene.
