A Study on Fracture Behavior Affected by Mechanical Clamping Pressure at CFRP Panel with Laminate Angle through Analytical Investigation

Abstract

Objectives: The adhesive is used at CFRP (Carbon Fiber Reinforced Polymer) composite with the bolt joint method now. This study aims at settling the fracture property due to the clamping pressure about laminate angle. Methods/Statistical Analysis: As an analytical study, this paper investigates the fracture behavior of a panel stacked at 30, 45, 60 and 75 when the clamping pressure caused by mechanical fastening is applied to a CFRP panel stacked at 5mm with a laminate angle. Through this study, the fracture property happened at the panel composed of CFRP is investigated through the analytical method prior to the experiment. Findings: As the fracture characteristics of the CFRP panel with laminate angles, the highest stress value was demonstrated at a laminate degree of 30 and the lowest at 60 based on the analytical result. By examining together with the result related to deformation energy, the differences of a maximum of 52% in stress value and 71% for deformation energy were seen. Through the result of this study, it is shown that the material property still higher is kept at the applied clamping pressure in case of the laminate angle of 60. Based on the analysis result of this paper, even if the same carbon fiber is used at the laminate angle of 60°, the mechanical property of the material can be enhanced through the application of laminate angles. The data of structural safety as optimal design can be secured at the stacking of composites with the applied clamping pressure. Improvements/Applications: The result of this study is expected to be enhanced and to be contributed to the evaluation through the data on durability and safety with regard to the fractures.