Abstract

In straight tubes, any force applied to the cylindrical wall causes hoop stress. Tool handles, a mop handle for example, experience hoop stress when being used actively or roughly handled. To ensure composite tubes can meet these challenges, the profiles must be manufactured with cross-aligned fibers, providing extra stiffness and high mechanical strength in transverse direction. Here Lauri Turunen, product business owner for tubes, tool handles and telescoping poles and pull-winding expert at Exel Composites, compares different manufacturing techniques and explores how the continuous manufacturing technology of pull-winding can achieve high hoop strength.

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