Thermo-mechanical de-bonding of composite-titanium single-lap adhesive joints

Ammasai Sengodan, G

Abstract

The aim of this work is to isolate the constituent adherends of the adhesively bonded single lap joints with minimal or no damage to them and prepare the debonded surfaces for re-bonding. Thermo-mechanical separation of carbon fiber reinforced plastics bonded to titanium using a structural adhesive was investigated at four different temperatures. The peak failure load decreases with increase in temperature and a linear softening of the adhesives was observed. Failure modes of the joint were progressed from composite adherend failure to adhesion failure with increase in temperature. There was a permanent deformation of titanium adherend found in the event of adhesion failure of the joint in the temperature region of 135-142 °C. The surfaces of the adherends de-bonded between 135-142 °C were cleaned and re-bonded with the original adhesive. The average lap shear strength of the re-bonded joints is reduced by 5-8% due to the minimal residual traces found on the cleaned surfaces of composite adherends and the initial bending imposed by the permanently deformed titanium adherends.

Citation

Ammasai Sengodan, G. (2017, August). Thermo-mechanical de-bonding of composite-titanium single-lap adhesive joints. Presented at 21st International Conference on Composite Materials, Xi'an, China

• Presentation Conference Type: Other
• Conference Name: 21st International Conference on Composite Materials
• Conference Location: Xi'an, China
• Start Date: Aug 20, 2017
• End Date: Aug 25, 2017
• Publication Date: Jan 1, 2017
• Deposit Date: Sep 30, 2022
• Publisher URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-85053119302&partnerID=MN8TOARS
• Additional Information: Event Type : Conference; Funders : Bhrami Jegatheeswaram Pillai from Rolls-Royce;Rolls-Royce Singapore; Projects : National Research Foundation, Singapore;Rolls-Royce@NTU Corporate Laboratory through the project MRT 3.3