دانلود رایگان مقاله پیش بینی لایه لایه شدن فولاد پلیمر کامپوزیت با مدل منطقه منسجم و آزمون لایه برداری

Abstract

This study reports on the prediction of the delamination of steel-polymer composites. To characterize the adhesive properties from peeling tests, a simple model was derived based on peeling mechanics, in particular considering plastically dissipated energy of polymer film due to bending. Peeling tests were performed at two angles so that the adhesive properties were determined in both normal and tangential directions. Then, peel strength at arbitrary angle was predicted and compared with experiments, showing that the peel strength at only two angles and peeling mechanics considering the bending of polymer film can accurately describe the adhesive properties of steel-polymer interface. Finally, finite element simulations based on the cohesive zone model were performed to predict the delamination between steel-polymer sandwich composites, demonstrating the validity of cohesive zone model equipped with necessary properties determined using peeling tests and the developed model in this study.

5. Conclusion

Peeling tests were performed to measure the adhesive properties between steel and polymer (nylon). A theoretical approach was also developed to identify the adhesive properties between steel and nylon. Based on the peeling mechanics and consideration of plastically dissipated energy by bending, a simple model was derived to characterize the adhesive properties in both the normal and tangential directions. Two example calculation were provided to validate the current approach. First, the peel strength between steel and polymer at an arbitrary angle was predicted and compared with experiments, demonstrating that the consideration of the bending of polymer film during peeling is essential to improving the prediction accuracy. Next, finite element simulation of peeling process was carried out using a cohesive zone model. It was concluded that the failures due to delamination in steelpolymer sandwich composites can be predicted using the cohesive zone model equipped with necessary properties determined using peeling tests and the simple model developed in this study.