Dynamic compressive mechanical response of a soft polymer material

The dynamic mechanical behaviour of a soft polymer material (Clear Flex 75) was studied using a split Hopkinson pressure bar (SHPB) apparatus. Mechanical properties have been determined at moderate to high strain rates. Real time deformation and fracture were recorded using a high-speed camera. Fracture micrographs were examined to explore the...

High-strain-rate tensile mechanical response of a polyurethane elastomeric material

The dynamic tensile mechanical response of a soft polymer material (Clear Flex 75) is investigated using a split Hopkinson tension bar (SHTB). Stress-strain relations are derived to reveal the mechanical properties at moderate and high strain rates. These relations appear to be rate dependent. Under static loading, the polymer exhibits an...

Root cause analysis of vibrations and pulsations in a naphtha pipe system with centrifugal pumps

The capacity of a platform installation consisting of naphtha feed lines from centrifugal pumps to an oven has been increased by 25 % in combination with rerouting of the piping layout upstream of the oven and inside the convection zone. The operating company observed considerable increase of the vibration levels of the naphtha feed lines since...

Modelling of impact behaviour of concrete - An experimental approach

The last few years, explosion scenarios in tunnels and the potential hazards from storage of high energetic materials have received significant attention. Moreover, due to terrorist attacks, structures that can withstand explosions have become a major concern. For the modelling of the behaviour of concrete structures under the explosive loading...

Fire exposed aluminium structures

Material properties and mechanical response models for fire design of steel structures are based on extensive research and experience. Contrarily, the behaviour of aluminium load bearing structures exposed to fire is relatively unexplored. This article gives an overview of physical and mechanical properties at elevated temperature of frequently...