# 적층 각도를 가진 CFRP 접착 구조물의 파손 및 정적 파괴 특성에 관한 융합 연구

Lee, Jung-Ho;Kim, Eundo;Cho, Jae-Ung
이정호;김은도;조재웅

• Accepted : 2019.01.20
• Published : 2019.01.28
• 22 3

#### Abstract

As composite is the light weight material whose durability and mechanical property are more superior than the existing general material. By taking notice of the composite with light weight, this study was about to investigate the static fracture characteristic of the bonded CFRP structure jointed with adhesive. Also, CFRP double cantilever beam with the variable of laminate angle was designed and the static fracture analysis was carried out. The laminate angles of CFRP double cantilever beam designed for this study were $30^{\circ}$, $45^{\circ}$ and $60^{\circ}$ individually. As the study result, the specimen with the laminate angle of $45^{\circ}$ was shown to have the durability better than those with the layer angles of $30^{\circ}$ and $45^{\circ}$. It was checked that the specimen with the laminate angle of $30^{\circ}$ had the weakest durability among all specimens. The damage data of the bonded CFRP structure by laminate angle could be secured through this study result. As the damage data of bonded interface obtained on the basis of this study result are utilized, the esthetic sense can be shown by being grafted onto the machine or structure at real life.

#### Keywords

Convergence;DCB(Double cantilever beam) specimen;CFRP(Carbon fiber reinforced plastic);Stacking angle;Equivalent stress

#### Acknowledgement

Supported by : National Research Foundation of Korea(NRF)