Adhesive Bondline Study Using Design fo Experiment Technique

摘要

The Navy has a requirement to perform bonded structural composite repairs on aircraff with use of vacuum bag pressure. The resulting adhesive bondline must be void free to ensure sufficient bond srength and inspection of the repair by nondestructive means. Magnobond 6363 two part epoxy paste adhesive was developed by the Naval Air Warfare Center Aircraft Division, patuxent River, MD(NAWCADPAX) for field bonded composite repairs. During the development process for bonded composite repairs utilizing Magnobond 6363, problems were encountered with bondline thickness control and porosity content that were related to process variations applied by each user. In response to this problem, NAWCADPAX conducted an evaluation of the most singificant processing factors using a Taguchi Design of Experiment(DOE) appraoch. This experimental design technique was applied to minimize the umber ofexperiments required in determining the effect of each of the significant factors on bondline thickness and porosity. The approach was effective in optimizing the evaluation process leading to the development of a preferred process for composite repairs utilizing Magnobond 6363.