Main laminate

A method for manufacturing a main laminate for a wind turbine blade, the main laminate extending in a spanwise direction from a proximal end through a transition region to a distal end and comprising a bottom side configured for facing a shell of the wind turbine blade, a top side configured for facing the interior of the wind turbine blade, and a thickness direction extending between the bottom side and the top side, the method comprising the steps of:

• providing:
• a pultrusion portion including a bottom pultrusion element extending in the spanwise direction to a pultrusion transition end, the pultrusion portion having a pultrusion transition portion at the pultrusion transition end, and
• a plurality of fibre-reinforced elements including bottom and top fibre-reinforced elements extending in the spanwise direction to a fibre-reinforced element transition end, the plurality of fibre-reinforced elements having a fibre-reinforced element transition portion at the fibre-reinforced element transition end;
• positioning the bottom pultrusion element and the bottom fibre-reinforced element in extension of each other, so that the fibre-reinforced element transition end of bottom fibre-reinforced element is adjacent to and faces the pultrusion transition end of the bottom pultrusion element;
• stacking the plurality of fibre-reinforced elements in the thickness direction from the bottom fibre-reinforced element to the top fibre-reinforced element;
• curing the pultrusion portion and the plurality of fibre-reinforced elements thereby forming a first joint between the pultrusion transition portion of the pultrusion portion and the fibre-reinforced element transition portion of the plurality of fibre-reinforced elements;
• and
• connecting a chordwise side of the pultrusion transition portion of the pultrusion portion and a chordwise side of the fibre-reinforced element transition portion of the plurality of fibre-reinforced elements with a second joint.

A method for manufacturing a wind turbine blade extending along a longitudinal axis from a root to a tip, the wind turbine blade comprising a root region and an airfoil region with the tip, the wind turbine blade comprising a pressure side, a suction side and a chord line extending between a leading edge and a trailing edge, the wind turbine blade comprising a shell providing the aerodynamic shape of the wind turbine blade and a main laminate forming a load carrying structure of the wind turbine blade, the method comprising the steps of:

• providing:
• a shell configured for providing the aerodynamic shape of the wind turbine blade,
• a pultrusion portion including a bottom pultrusion element extending in the spanwise direction to a pultrusion transition end, the pultrusion portion having a pultrusion transition portion at the pultrusion transition end, and
• a plurality of fibre-reinforced elements including bottom and top fibre-reinforced elements extending in the spanwise direction to a fibre-reinforced element transition end, the plurality of fibre-reinforced elements having a fibre-reinforced element transition portion at the fibre-reinforced element transition end;
• positioning the bottom pultrusion element and the bottom fibre-reinforced element in extension of each other on the shell of the wind turbine blade, so that the fibre-reinforced element transition end of bottom fibre-reinforced element is adjacent to and faces the pultrusion transition end of the bottom pultrusion element;
• stacking the plurality of fibre-reinforced elements in the thickness direction from the bottom fibre-reinforced element to the top fibre-reinforced element so that the pultrusion transition end of the pultrusion portion is positioned adjacent to the fibre-reinforced element transition end of the plurality of fibre-reinforced elements;
• curing the pultrusion portion and the plurality of fibre-reinforced elements thereby forming a first joint between the pultrusion transition portion of the pultrusion portion and the fibre-reinforced element transition portion of the plurality of fibre-reinforced elements;
• and
• connecting a chordwise side of the pultrusion transition portion of the pultrusion portion and a chordwise side of the fibre-reinforced element transition portion of the plurality of fibre-reinforced elements with a second joint.