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http://dx.doi.org/10.7234/composres.2018.31.6.332

Low Cycle Fatigue Life Behavior of GFRP Coated Aluminum Plates According to Layup Number  

Myung, Nohjun (Department of Mechanical Engineering, Graduate School, Hanyang Univ.)
Seo, Jihye (Department of Mechanical Design Engineering, Graduate School, Hanyang Univ.)
Lee, Eunkyun (Department of Mechanical Design Engineering, Graduate School, Hanyang Univ.)
Choi, Nak-Sam (Department of Mechanical Engineering, Hanyang Univ.)
Publication Information
Composites Research / v.31, no.6, 2018 , pp. 332-339 More about this Journal
Abstract
Fiber metal hybrid laminate (FML) can be used as an economic material with superior mechanical properties and light weight than conventional metal by bonding of metal and FRP. However, there are disadvantages that it is difficult to predict fracture behavior because of the large difference in properties depending on the type of fiber and lamination conditions. In this paper, we study the failure behavior of hybrid materials with laminated glass fiber reinforced plastics (GFRP, GEP118, woven type) in Al6061-T6 alloy. The Al alloys were coated with GFRP 1, 3, and 5 layers, and fracture behavior was analyzed by using a static test and a low cycle fatigue test. In the low cycle fatigue test, strain - life analysis and the total strain energy density method were used to analyze and predict the fatigue life. The Al alloy did not have tensile properties strengthening effect due to the GFRP coating. The fatigue hysteresis geometry followed the behavior of the Al alloy, the base material, regardless of the GFRP coating and number of coatings. As a result of the low cycle fatigue test, the fatigue strength was increased by the coating of GFRP, but it did not increase proportionally with the number of GFRP layers.
Keywords
Low cycle fatigue; Composite materials; Glass fiber reinforced plastic; Total strain energy density method;
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