Assessment of the technical safe limit speed of a non-ice-strengthened naval vessel with representative and alternative side shell designs in ice-infested waters

Sailing in ice-infested waters has become more relevant for the Royal Netherlands Navy (RNLN). A method is developed to determine the technical safe speed for a single ice floe impact with a typical non-ice strengthened naval vessel. A representative ice floe impact load scenario is applied to three structural arrangements for the side shell...

Strengthening of rivetedd connections of a steel Arch Bridge: Lessons learned

As part of an extensive renovation program, Arup Netherlands delivered engineering services for the strengthening and renovation of 8 large steel bridges in the Dutch highway network. Strengthening of the riveted splice connections at the ends of the hangers of a steel arch bridge on the Dutch A2 motorway represented a significant challenge to...

Slicing sodium from bakery products

The need for sodium reduction in our diet is clear to consumers, dieticians and food manufacturers. As sodium concentration has a strengthening effect on gluten, sodium reduction decreases dough mixing tolerance, dough resistance and induces dough stickiness. In particular, the latter may cause problems in mechanical processing of dough. In...

How to determine the dynamic fracture energy of concrete. Theoretical considerations and experimental evidence

Data on the dynamic fracture energy of concrete are scarce and also not consistent due to different test methods, data analyses and definitions. In [1] the authors summarized and evaluated the test methods. Suggestions for the standardization of dynamic tensile testing were given. In the current paper the discussion is continued. First,...

Technology development for metallic hot structures in aerodynamic control surfaces of reusable launchers

In this paper a summary is presented of the technology development in the Netherlands focussed on the design and development of a metallic aerodynamic control surface for the future European reusable launcher. The applied materials are mainly Oxide Dispersion Strengthened (ODS) alloys produced by powder metallurgy. The main design problems for...