Method of forming fiber-reinforced epoxy composite joints, and product thereof
US4015035A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1974 |
| Grant date | Mar 29, 1977 |
| Priority date | — |
| Expiry date | Dec 9, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/195
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved manufacture including a fiber-reinforced epoxy composite joint, and the method for producing same, in which the fibers of each of the composite adherends pass through and are intermeshed across the joint bondline. A scarfed mating surface is prepared on the end of each of the adherend elements-to-be-joined, after which a chemical etching of the mating ends to obtain exposed lengths of filaments or fibers is provided. A sheet of unsupported adhesive material is inserted between the scarfed and etched mating surfaces prior to their layup, after which heat and pressure are applied for bonding the joint. The exposed fibers of each element cross the bondline to intermesh with those of the other element during the melting of the unsupported adhesive. This process increases the joint efficiency to 83% of the efficiency of a non-joined element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.