Quantitative Injection Repair Characterization and Strength Restoration
Abstract
The overarching objective of this proposed activity is to provide ability to quantitatively assess injection repair of delaminations, with the ultimate goal being allowing this method to be relied upon as one returning strength to the component. This involves establishing assessment methods and improving materials and processes to the level of reliably insuring removal of contaminants, achieving a desired level of percent fill of the delamination area (current F/A-18 process requires 50%), and ultimately recovery of strength. Being able to take credit for strength restoration from injection repairs would permit such repaired components to be used further in service at much reduced cost than extensive cutout repairs or full part replacement. Expected Outcomes. The expected final products from this research are: (i) More quantitative-based understanding of contamination state within delaminations found on in-service aircraft. (ii) Tools/methods for quantitatively assessing contamination state before and after cleaning. (iii) Effective cleaning and surface preparation process for removal of contaminants and creating a chemically-active internal surface receptive to bonding with injection fill material (polymer). (iv) Tools/methods for injecting resin to achieve desired levels of fill percentage across multiple planes of delamination; also ability to assess (measure) the degree of fill. (v) Tools/methods for assessment of mechanical strength of component, particularly in-situ on a real aircraft part. (vi) Overall: ability to take credit for injection repairs to provide strength recovery.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 24, 2019
- Source ID
- N000141912164
Entities
People
- Hyonny Kim
Organizations
- Office of Naval Research
- United States Navy
- University of California, San Diego