Improvement of fatigue life by compliant and soft interlayers. (1st March 2016)

• Record Type: Journal Article
• Authors: Kolednik, O.; Zechner, J.; Predan, J.
• Is Part Of: Scripta materialia. Volume 113(2016)
• Page Start: 1
• Page End: 5
• Publication Date: 2016-03-01
• Subjects: Aluminum alloys -- Multilayers -- Fatigue test -- Finite element analysis -- Material inhomogeneity effect; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.10.021
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Retardation of fatigue crack growth rate due to the introduction of thin, compliant and/or soft interlayers is investigated. The mechanism is the reduction of the crack driving force in the interlayer. Fatigue tests are conducted on composites made of high-strength aluminum alloy as matrix and technically pure aluminum or adhesive as interlayer material. The adhesive interlayer causes an increase in fatigue life by a factor 20 or more, whereas the aluminum interlayer yields only a moderate improvement. Numerical simulations based on the configurational force concept are utilized for understanding. The results show new possibilities for the design of fatigue-resistant materials. Graphical abstract: