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Monday, July 30, 2012

Testing Arrows for Pinpoint Accuracy in Archery

The London 2012 Olympic Games have provided a lot of excitement for archery fans. South Korea's Im Dong-hyun, legally blind in one eye, set the first Olympic World Record. The South Korea Women's Archery Team won gold as did the Italian Men's Team.

Olympic archers aim their arrows at targets measuring from 122 cm to 12.2 cm in diameter from a distance of 70 m. They must have a keen eye, backed by nerves of steel, to hit the target.

Today, most Olympic archers use arrows made up of composite materials. Instron performed impact tests on the shafts these composite arrows to see how their properties would measure up. An impact resistance test performed on a CEAST 9310 falling weight system coupled with a 3-point bend test provided the data that determined the benefits of the composite shaft. The  properties of the composite materials allow the shafts to be made thinner and lighter, thus increasing the arrow’s speed. The durability also prevents splitting upon impact, allowing for a more secure hit on the target.

Even archer bows are made of composite material nowadays. In fact, the “recurve bow”, which is the standard bow used in the Olympics, is primarily made of either carbon fiber or fiberglass. Again, in this application, the strength and durability of composite materials, coupled with the light weight attributes, play important roles.



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