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This paper describes a novel cumulative fatigue damage life predictive model aimed at providing the design engineer an easy fatigue life predictive tool using experimental data. This encompasses an integrated approach of joint testing, analysis, and modeling. For this purpose, joints were prepared using stainless steel adherend specimens and a commercial silver-filled electronically conductive adhesive, and tested under monotonic and cyclic fatigue conditions, at 28°C, 20% relative humidity. Load–number of cycles (P–N) curves were generated for these specimens using load ratio R = 0.1 and R = 0.5 (R = Pmin/Pmax = σmin/σmax) at a cyclic frequency of 150 Hz. Fatigue life and failure behaviors due to cumulative fatigue damage were assessed using a novel experimental program. Experimental results revealed that most of the fatigue damage occurs during the latter part of the fatigue process and the combination of lower load ratio and higher maximum applied load has the most detrimental effect on the failure of the joint. Finally, a novel analytical model for fatigue life prediction under variable cyclic conditions was proposed using experimental data and a detailed stress analysis. [ABSTRACT FROM AUTHOR]

This paper addresses the experimental and numerical analysis of a novel design of adhesive joint. So the consistency of the data could be verified, a statistical study was performed that considered not only the sample size population but also the statistical differences between the single-lap and wavy-lap joints. In addition to experimental tests, a finite element analysis was carried out to analyze the stress fields inside the joints. The results show an average increase of nearly 41% on loading. This fact could be due to the compressive stress field developed inside the wavy-lap joint. Moreover, this stress field distribution can also be the reason for the adherent delamination observed in the wavy-lap joints. So far, the modified wavy-lap joint seems to lead to stronger joints. [Copyright &y& Elsevier]