During his tenure at the National Aviation and Space Administration, Craig Collier helped develop the software that would become HyperSizer, a computer-aided program for designing with composite laminates. When he left NASA, his brainchild followed him, as the first ever software allowed to be commercialized by the space agency. The latest version, HyperSizer v6, was recently released. Image courtesy of Collier Research Corp. Different composite laminates overlap in this model of a wind-turbine blade. Each color represents a different laminate zone and often depicts one or more overlapping composites. Related Links: Interactive Screens For Less, To Go HyperSizer is designed
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.