NOVELTY - Agglomerated particle cloud network coated fiber bundle (10) comprises: a bundle of fibers (100) comprising many fibers (110) and void space between the fibers, where the fibers comprise a surface and the distance between adjacent fibers is defined as the separation distance; and porous agglomerated particle cloud network (200) comprising many agglomerated nanoparticles (210). The agglomerated nanoparticles are located in at least a portion of the void space in bundle of fibers and form bridges between at least a portion of adjacent fibers, where 10-100% by number of fibers contain bridges.    USE - The agglomerated particle cloud network coated fiber bundle is useful: in an agglomerated particle cloud network coated textile; and in an agglomerated particle cloud network composite, which is useful in a structure comprising wind turbine blades, bridges, boat hulls, boat decks, rail cars, pipes, tanks, reinforced truck floors, pilings, fenders, docks, reinforced wood beams, retrofitted concrete structures, aircraft structures, reinforced extrusions or injection moldings (claimed).    ADVANTAGE - The agglomerated particle cloud network coated fiber bundle: provides agglomerated cloud network structure, which is unique from most common coating morphologies, is a three dimensional heterogeneous non-uniform structure hosted within the fiber bundles of the substrate and serves to directly interact with significantly higher volume fraction of the composite system than traditional unstructured coatings or individual fiber coatings; enhances the fatigue durability of fiber reinforced polymer composites; is porous thus influences a large volume of the composite material without a significant mass addition; provides more efficient load sharing, which reduces the critical fiber length enabling a fiber to carry more load over shorter lengths and allowing the system to tolerate a higher number of local failure instances thus increases the fatigue life; mitigates the ability for damage to interact and significantly delays the onset of reductions in material strength under cyclic loading conditions; and provides agglomerated particle cloud network composite with increased local stiffness, increased local toughness, longer crack path length and more uniform fiber distribution with the bundles, enhanced resistance to delamination, enhanced impact damage tolerance, thus allows for longer, lighter, more durable and/or lower cost structures in applications including wind turbine blades.    DETAILED DESCRIPTION - Agglomerated particle cloud network coated fiber bundle (10) comprises: a bundle of fibers (100) comprising many fibers (110) and void space between the fibers, where the fibers comprise a surface and the distance between adjacent fibers is defined as the separation distance; and porous agglomerated particle cloud network (200) comprising many agglomerated nanoparticles (210). The agglomerated nanoparticles are located in at least a portion of the void space in the bundle of fibers, where the agglomerated nanoparticles form bridges between at least a portion of the adjacent fibers, where 10-100% by number of fibers contain bridges to at least one adjacent fiber within the agglomerated particle cloud network coated fiber bundle, where the agglomerated nanoparticles form 1-60% of the effective cross-sectional area of the agglomerated particle cloud network coated fiber bundle. INDEPENDENT CLAIMS are also included for:    (1) an agglomerated particle cloud network composite comprising the agglomerated particle cloud network coated fiber bundle and a resin in at least a portion of the void space in the fiber bundle; and    (2) a wind turbine blade comprising the agglomerated particle cloud network composite in a section of the wind turbine blade comprising spar section, root section, leading edge or trailing edge.    DESCRIPTION OF DRAWING(S) - The figure shows cross sectional view of agglomerated particle cloud network coated fiber bundle.    Agglomerated particle cloud network coated fiber bundle (10)    Bundle of fibers (100)    Fibers (110)    Agglomerated particle cloud network (200)    Agglomerated nanoparticles (210)