Adhesive Strength Of Interface Research Articles

Comparison between 2D and 3D applications of the coupled criterion to crack initiation prediction in scarf adhesive joints

Crack initiation of scarf adhesive joints with similar adherends is predicted through 2D and 3D applications of the coupled criterion. The joint adhesive crack initiation topology and loading are determined as a function of the joint angle and of the specimen width, using both an energy and a stress criterion consisting of the maximum interface normal or shear stress to strength ratio. Adherend/ adhesive interface strength and toughness are determined by indirect confrontation to experimental results under tensile loading. The blind application of the proposed method to crack initiation of scarf adhesive joints under bending leads to a good agreement with experimental data. Compared to the 2D case, the 3D application of the coupled criterion allows determining the crack topology and leads to a slight better agreement with experimental results.

A Shear Strength Degradation Model for Anisotropic Conductive Adhesive Joints Under Hygrothermal Conditions

Hygrothermal environments can degrade anisotropic conductive adhesive (ACA) joints by weakening the shear strength of adhesive interface. In this paper, the shear strength degradation model of ACA joints under hygrothermal conditions was formulated through experimental testing and theoretical modeling. The shear strength degradation data were obtained from different hygrothermal aging tests and the ACA moisture properties were characterized for the corresponding hygrothermal conditions. Theoretical models considering the hygrothermal factors of T (temperature), RH (relative humidity), and t (time), were used to fit the shear strength degradation data. It was found that the inverse exponential law was the best candidate model to predict the degradation data. The shear strength degradation model of ACA joints under hygrothermal conditions was proposed, where the relationship of the S (shear strength) and the hygrothermal factors (T, RH, and t) was expressed in an analytical model. The degradation model was validated by experiments, and the model predictions agreed well with the test results.

Evaluating Strength of Adhesive Interface between Metal and Resin in Resin-Molded Structures

Evaluating Strength of Adhesive Interface between Metal and Resin in Resin-Molded Structures

J0403-1-4 樹脂モールド構造におけるセラミックスと樹脂間の接着界面強度評価([J0403-1]締結・接合部の力学と評価(1):接着接合)

J0403-1-4 樹脂モールド構造におけるセラミックスと樹脂間の接着界面強度評価([J0403-1]締結・接合部の力学と評価(1):接着接合)