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所属单位：航空学院

发表刊物：Gongcheng Kexue Xuebao

摘要：The long-term performance of overlap adhesion, one of the major joint technologies of FRP, is key to its practical engineering application. Experiments on the creep behaviors of the double lap joint of a hybrid FRP (HFRP) were conducted. Obvious creeps were observed and measured under various environments reflecting different levels of shear stress and humidity. Then, a fractional derivative rheological model was proposed to characterize the creep deformation of the overlap joints. By applying the Mittag-Leffler function to the proposed model, an improved Powell optimization algorithm with an initial-value calculation method was utilized to determine the values of the fitting parameters on the basis of the experimental data obtained. By introducing stress influence functions to the conventional fractional calculus, a modified formula of fractional creep compliance was considered to reflect the influence of stress level on the creep property of the overlap joint. Results indicate that the model is capable of predicting the creep behavior of overlap joints up to a sustained stress level of 30%-70% of the shear strength with relative simple mathematical expressions and only a few fitting parameters. © All right reserved.

ISSN号：2095-9389

是否译文：否

发表时间：2017-09-01

合写作者：Wang, Xiao-Meng

通讯作者：周储伟