Aluminium foam sandwich structures have excellent energy absorption capacity, combined with good mechanical properties and low density. Some of the authors this paper proposed an innovative Metallic Foam Shell protective device against flying ballast impact damage in railway axles. A closed-cell aluminium was chosen for device. The main goal study experimental investigation responses panels. Lo...

In this paper, wall thinning having values of 3 to 80% pipe thickness were detected significantly. In the experiment, a microwave network analyzer was employed to generate microwave signals propagating in the pipe where the frequency was swept from 47.38 to 47.47 GHz. By building up a resonance model for the microwave signals propagating in the pipe, and by analyzing the resonance results of th...