Novel fatigue strengthening solution for metallic structures using adhesively bonded Fe-SMA strips: A proof of concept study. (July 2021)

• Record Type: Journal Article
• Authors: Wang, Wandong; Li, Lingzhen; Hosseini, Ardalan; Ghafoori, Elyas
• Is Part Of: International journal of fatigue. Volume 148(2021)
• Publication Date: 2021-07
• Subjects: Fatigue strengthening -- Prestressing -- Fatigue crack growth -- Adhesive bonding -- Fatigue crack growth life extension; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2021.106237
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: An iron-based shape memory alloy is exploited for fatigue mitigation. The proposed solution combines the merits of bridging and prestressing mechanisms. The bonded smart patch is highly effective in retarding fatigue crack growth. Abstract: An innovative fatigue strengthening solution for metallic structures that takes advantage of the shape memory effect of an iron-based shape memory alloy (Fe-SMA) and the bridging mechanism offered by the bonding technique has been proposed and examined. Fatigue tests on cracked steel plates with bonded carbon fiber-reinforced polymer (CFRP) and nonprestressed and prestressed Fe-SMA strips were conducted. The experimental results demonstrate that the bonded prestressed Fe-SMA strips are much more effective than CFRP strips, extending the fatigue crack growth life by a factor of 3.51. The proposed innovative solution is highly effective in retarding fatigue crack growth in metallic structures.