This study carried out fiber damage detections of laminated GFRP plate structures using a modified bi-variate Gamma function. The effects of different layup sequences of composites on the fiber damage detection are studied using the finite element commercial package and genetic algorithm. Four unknown parameters are considered to determine the shape of the damage distribution, which is a modified form of the bivariate Gamma density distribution function. The sample studies show the excellence of the proposed method from the standpoints of its computation efficiency as well as its ability to determine the complex shape of an arbitrary stiffness degradation distribution.

1. 서 론
 2. 이론적 정식화
  2.1 보강섬유 손상분포 모델
  2.2 이변량 Gamma 밀도 함수
  2.3 ABAQUS-유전알고리즘 연동 역문제 해석
 3. 수치해석 및 결과분석
  3.1 해석 모델
  3.2 해석 결과
 4. 요약 및 결론
 ACKNOWLEDGMENT
 REFERENCES

• 김규동(안동대학교 토목공학과 박사과정) | Kim, Gyu-Dong
• 이상열(안동대학교 토목공학과 부교수) | Lee, Sang-Youl Corresponding author