부산대학교 도서관

Finite element analysis (FEA) has become an important tool for evaluating drop reliability of consumer electronic products. However, the accuracy of FEA highly depends on the prediction of material constitutive, i.e., the stress-strain behavior. For polymers, lots of them are viscoelastic or hyperelastic, which could be described by different kinds of constitutive models. Thus, how to quickly obtain the material constitutive with high precision is a problem worthy of in-depth study. In this paper, for a commercial battery adhesive material, the stress-strain curve is obtained by uniaxial tension and plane tension experimental tests. Then its constitutive equation is tried to be constructed using Neo-Hooke, Mooney-Rivlin, Reduced-Polynomial, Ogden and Arruda-Boyce model. We evaluated the applicability of different models in detail, and finally found that Ogden model could describe the with relative larger initial modulus among all of these hyperelastic models. After that, we use the second-order Ogden model to successfully construct the constitutive for the adhesive material, which is further performed in actual drop analysis within whole smartphone product structure.