دانلود رایگان مقاله انگلیسی خصوصیات شکستگی نمونه فیبر های پلیمری تقویت شده (CFRP) با خط اتصال چسبناک - اشپرینگر 2018

In this paper, CFRP specimens were processed with the configuration of opening mode to which various fiber laminate angles have been applied. It is possible to observe that the displacements of detachment at the adhesive interface differ from each other in both the experiment and analysis results. In case of the lamination at the angle of 30°, the detachment of adhesive interface occurred at the reaction force of 224 N with the progression of 5.24 m. In case of laminations at the angles of 45° and 60°, the detachment of bonded interface occurred with the reaction forces of 1134 N and 1100 N with the progressions of 4 mm and 4.7 mm, respectively. On the basis of these results, it was possible to discern that the differences in the detachment displacement of adhesive interface and reaction force occur according to the laminate angle in the CFRP with same material properties. Through this study result, it is thought that, unlike the existing woven type CFRP to which the laminate angle was not applied, securing of the basic fiber design data for manufacturing CFRP customized to the user’s environment will be able to make contributions towards the improvement of the strength and stability of the bonded CFRP structures.

4. Conclusion

In this paper, the tensile characteristics of CFRP specimen for mode 1 bonded with adhesive were confirmed through experiment and analysis. As the highest reaction force and displacement, the values are observed at the laminate angle of 60° in both analysis and experiment, in which this angle was evaluated to be most safe when applied to structures. In addition, on the basis of the result values of the experiment and analysis, the detachment of the bonded interface increasingly accelerates with the decrease in laminate angle, and it can be conjectured that the value of displacement at such time would be approximately 4 mm. In addition, the average error on the displacement at which the detachment of the bonded interface that occurs through experiment and analysis results is found to be 31%. Therefore, it is thought that the accuracy will be improved through the application of the adhesion curvature on the formation of the bonded interface by means of adhesion exfoliation at experiment instead of the existing reliance on the TB data at analysis. In addition, it was possible to confirm the reliability of reaction forces of the experiment and analysis as these values approach with an average error within approximately 7%.