The measurement of damage initiation, particle adhesion and cohesive strength from traction displacement curves of a nano-toughened epoxy. (October 2016)

• Record Type: Journal Article
• Authors: Mc Auliffe, D.; Karac, A.; Murphy, N.; Ivankovic, A.
• Is Part Of: International journal of adhesion & adhesives. Volume 70(2016:Oct.)
• Page Start: 62
• Page End: 73
• Publication Date: 2016-10
• Subjects: Nano-particles -- Adhesive joints -- Toughening mechanisms -- Cohesive strength; Adhesion -- Periodicals; Adhesives -- Periodicals; Adhésion (Physique) -- Périodiques; Adhésifs -- Périodiques; Adhesie; Kleefstoffen; Adhesion; Adhesives; Periodicals; 668.3
• DOI: 10.1016/j.ijadhadh.2016.04.014
• Languages: English
• ISSNs: 0143-7496

Abstract

Abstract: In this work the deformation behaviour of a nano-toughened epoxy adhesive is measured at different levels of stress triaxiality. The test method consists of a notched axisymmetric adhesive layer loaded in tension. The recorded traction displacement curves were analysed numerically and it was found that the measured peak stress corresponds to the intrinsic cohesive strength, σ max of the material. This method allows experimental measurement of σ max for use in cohesive zone models of fracture. Additional features of the traction displacement curves include a kink that corresponds to particle debonding at a critical hydrostatic stress. By application of the Mori–Tanaka model, the relationship between the experimental measurements and particle/matrix adhesion is described.