Abstract A theoretical energy-based model to capture the ballistic response of sandwich structures made composite material peels and a crushable foam core was developed. The based on wave propagation theory it split in six stages with their corresponding energy-absorption mechanisms. division physical interpretation perforation process involving reasonable hypotheses simplifications. analysed a...

The influence of major Quaternary climatic changes on growth and decay of the Greenland Ice Sheet, and associated erosional impact on the landscapes, is virtually unknown beyond the last deglaciation. Here we quantify exposure and denudation histories in west Greenland by applying a novel Markov-Chain Monte Carlo modelling approach to all available paired cosmogenic 10Be-26Al bedrock data from ...

Rapidly-flowing ice streams are an important mechanism through which ice sheets lose mass, and much work has been focussed on elucidating the processes that increase or decrease their velocity. Recent work using standard inverse methods has inferred previously-unrecognised regular patterns of high basal shear stress (‘sticky spots’ >200 kPa) beneath a number of ice streams in Antarctica and Gre...

The deformation of subglacial till is instrumental in causing certain glacier surges, the motion of rapid ice streams in ice sheets, and ice sheet surges which are associated with Heinrich events, and consequent rapid climatic shifts, during the last ice age. It may also be the means whereby drumlins are formed, and these in turn may act as a brake on large scale ice flow. It is therefore impor...

The use of high-modulus ceramic materials under conditions simulating the screen protection space objects from damage by fragments man-made debris is considered. introduction an aluminum jet at a speed ~10 km/s into barrier located behind brittle material screens was experimentally studied. A comparative analysis parameters residual cavity in made it possible to reveal effect structural rearran...