SINGLE LAP JOINT FIXTURE FOR ADHESIVE BONDED JOINTS.

摘要

The present invention relates to a single lap joint fixture for adhesive bonded joints of members employed in composite structures involving carbon fiber reinforced plastic(CFRP) adherents and epoxy adhesive that can control glue line thickness by applying desired controlled uniform bonding pressure ensuring required improved lap shear strength(LSS) in the resulting adhesive bonded joint. The fixture is capable to apply controlled uniform and optimum bonding pressure on the lap area of test specimen by compression of springs by providing load through rotation of nuts on bolts assembled to the fixture. Moreover, the fixture enable maintaining desired controlled uniform glue line thickness by providing a backup plate of required thickness placed below the top adherent of the single lap joint. The combined effect of optimum bonding pressure and required glue line thickness enable achieving desired improved lap shear strength for the bonded joint in a simple and reliable manner.