重ね合せ接着継手の衝撃疲労強度

概要

論文の詳細を見る
Adhesive bonded lap joint is fundamental to many adhesive joint design in indusry. Hence, to investigate the effects of basic factors, such as over-lap length, on its fatigue strength is important to establish the design standard for the lap joint. In this study, the effect of over-lap length on fatigue strength was inverstigated using a single lap joint bonded with an epoxy-polyamide adhesive under impact and non-impact stress condition.Form the comparison of the non-impact fatigue strength τ_<max> and the static shear strength τ_ηby taking the over-lap length as a parameter, it was revealed that the longer was the over-lap length, the lower was the non-impact fatigue strength, τ_<max>, and also the value of τ_b became lower at the same degree as that of τ_<max>, as given by the following correlation. τ_<max>/τ_b=1.71N_f^<-0.12> where N_f is the number of stress cycles to failure. However, when the impact fatigue strength on the S_N diagram was compared with the non-impact one, it was observed that the former showed more rapid lowering trend with increasing number of stress cycles than latter. Furthermore, with increasing the over-lap length, or with increasing the stress concentration factor, the impact fatigue strength decreased more rapidly than the non-impact fatigue strength.
社団法人日本材料学会の論文
1985-11-15