초록 ▼

A method of arresting delamination between and within plies of a composite laminate having layers containing a resin without significantly degrading the structural strength of the laminate characterized by emplacing within a plurality of the laminate layers having a resin, at a plurality of respecti

A method of arresting delamination between and within plies of a composite laminate having layers containing a resin without significantly degrading the structural strength of the laminate characterized by emplacing within a plurality of the laminate layers having a resin, at a plurality of respective discrete locations, narrow strips of a tough adhesive having a fracture toughness greater than the fracture toughness of the resin in the respective layers of laminate. The adhesive has a Mode I critical strain energy release rate in the range of 5 inch pounds per square inch or more; for example, about 10 inch pounds per square inch. Also disclosed is a preferred method of constructing the laminate to employ this invention.

대표청구항 ▼

A composite laminate having a plurality of laminate layers containing a resin having embedded therewithin high tensile strength filaments of a light weight component; a plurality of respective narrow strips of tough adhesive at a plurality of respective discrete locations within each layer of lamina

A composite laminate having a plurality of laminate layers containing a resin having embedded therewithin high tensile strength filaments of a light weight component; a plurality of respective narrow strips of tough adhesive at a plurality of respective discrete locations within each layer of laminate, said adhesive having a fracture toughness greater than the fracture toughness of the resin in the respective layers of laminate; and a region of diffused adhesive surrounding each strip of tough adhesive, said region of diffused adhesive having a toughness greater than the fracture toughness of the resin in the respective layers of laminate such that said composite laminate has increased resistance to delamination and any delamination, either inter-layer or intra-layer, will be arrested and contained within a predetermined zone having an aerial extent determined by the respective angles which the respective filaments in the resin in each respective layer are oriented.