The compressive behavior of open-cell aluminum alloy foam and stainless steel woven textile core materials have been investigated at three different deformation rate regimes. Quasi-static compressive tests were performed using a miniature loading frame, intermediate rates were achieved using a stored energy Kolsky bar, and high strain rate tests were performed using a light gas gun. In agreemen...

Abstract In order to study the effect of different launch tube diameters gas-driven two-stage light gas guns on flow field during process, a model piston movement in pump projectile was established using Fluent. Using dynamic mesh technology and 6DOF model, numerical simulation process gun carried out, effects tubes velocity bore were obtained. The results show that when mass difference between...

LOCALIZED phenot.ypic changes in petal color following X-irradiation and acute or chronic gainma irradiation have been reported for several species of higher plants (IBA, MA'rSUBARA, INOKOSHI, OKA and MESHITSUKA 1964; MATSUBARA, IBA, OKA and MESHITSUKA 1964, MoEs 1966; GUPTA and SAMATA 1963, 1964; RICHTER and SINGLETON 1955; SAGAWA and MEHLQUIST 1957; NEZU 1963b; MESHITSUKA, OKA, MATSUBARA and ...

A gas-gun technique to radially expand cylinders of a chosen material, based on a technique developed in 1979, has recently been re-established. Stainless steel 304 cylinders of length 160 mm, internal diameter 67 mm and thickness either 0.5 or 1.5 mm have been expanded using a 70 mm bore single-stage gas-gun. Microstructural analysis of the recovered specimens was performed using optical micro...

The newer techniques of cementing aim to improve interlock between cement and bone around a femoral stem by combining high pressure and reduced viscosity. This may produce increased embolisation of fat and marrow leading to hypotension, impaired pulmonary gas exchange and death. For this reason the use of high pressures has been questioned. We compared finger-packing with the use of a cement gu...

The purpose of introducing a combined cycle with gas turbine in power plants is to reduce losses of energy, by effectively using exhaust gases from the gas turbine to produce additional electricity or process. The efficiency of a combined power plant with the gas turbine increases, exceeding 50%, while the efficiency of traditional steam turbine plants is approximately 35% to 40%. Up to the pre...