Numerical simulation of a resistant structural bonding in wind-turbine blade through the use of composite cord stitching

The trailing edge is a critical part of blade because of monolithic bonding, which may lead to separation of edges while wind-turbine is in service. It is easily perceptible that the maintenance is (under harsh environmental conditions) extremely expensive and time consuming for wind turbine blades with excessive length (100 m). From technological point of view, o shore wind generation maintenance teams are targeting zero-maintenance and/or least maintenance in a well-chosen timing. As a matter of fact, the two halves (top and bottom skins) of a wind blade should hold together as long as possible to allow enough time for maintenance in the event of onset of damage. Accordingly, we are suggesting a strategy, which consist the joints with 'carbon-fiber cord composite stitching'. In order to implement this technique in industrial application, one should take care of lowering stress concentration as much as possible around drilled holes and should prevent indentation to carbon-fiber cords. This paper is addressing the mentioned technologies in detail, using numerical simulation.