Experimental Study of Low Cycle Fatigue Properties for Epoxy Resins with Dibutyl Phthalate (Dbp)

Archives of civil engineering

Jiajia Zhou^3¹  Zhi Wang^1,2⁴  Long Li^4⁴  Linjian Song^4⁵ 

[1] Engineering Science, No.100 Science Avenue, 450001, Zhngzhou, China^1;Engineering Science, No.100 Science Avenue, 450001, Zhngzhou, China^3;Engineering Science, No.100 Science Avenue, 450001, Zhngzhou, China^4;Dr., Zhengzhou University, School of Mechanics &Michigan Technological University, Department of Civil and Environmental Engineering, 1400 Townsend Dr., Houghton 49931,, MI, USA^2;Mr., Zhengzhou University, School of Mechanics &

关键词: Low cycle fatigue;    Dibutyl Phthalate (DBP);    Epoxy resins;    Strain energy;    Fatigue life;   

DOI  :  10.2478/ace-2018-0021

学科分类：建筑学

来源: Polska Akademia Nauk * Instytut Podstawowych Problemow Techniki / Polish Academy of Sciences, Institute of Fundamental Technological Research

【 摘 要 】

In order to improve the toughness of traditional epoxy resin, dibutyl phthalate (DBP) was introduced into the epoxy resin. The static mechanical performance of plasticized and unplasticized epoxy resin was evaluated. The test results showed that the DBP modified epoxy resin can obtain a higher toughness than conventional epoxy resin, but the elastic modulus and the tensile strength were slightly reduced. The low cycle fatigue test results indicated that the stress ratio and the stress level were two critical factors of fatigue life, which was increased with the growth of stress ratio. It was also found that the fatigue life of plasticized specimen was much less than that of the unplasticized specimen because of the plastic deformation. A logarithmic linear relationship was then established to predict the fatigue life for plasticized epoxy resin. The strain energy density was also applied to demonstrate the accumulation of energy loss. In addition, the fatigue toughness can be obtained by the hysteresis loop area method.

【 授权许可】

Unknown