AE法を用いた樹脂/金属接着界面の疲労はく離特性の評価

抄録

Using a metal plate specimen with a through hole embedded by epoxy resins, fatigue delamination behavior along the resin/metal bonded interface was observed. The metal plate is an aluminum alloy and the resins are ThreeBond 2222P and 2249G with low and high bonding strength, respectively. The interface was observed by a digital microscope and AE (Acoustic Emission) signals caused by the delamination was measured. As a result, high AE signals are counted for 2249G. Opening and sliding displacements along the interface delamination were evaluated by DIC (Digital Image Correlation) method. The experimental results obtained from DIC method are smaller than theoretical values calculated from FEM analysis for 2222P. On the other hand, the experimental results are larger than theoretical values for 2249G and thereby the stress intensity factors evaluated from measured opening and sliding displacements are larger than those evaluated from FEM model.