Notched Strength Analysis of CRALL Materials by FEM (I)

J. Ocean Eng. Technol. 1999;13(2):41-50.

Yoon, Han-Ki;

FEM에 의한 CRALL재의 노치강도 해석(I)

윤한기;

동의대학교 공과대학 기계공학과;

Keywords: CRALL, Circular Hole Notched Strength, FEM Analysis, Law of Mixture, Circular Hole Size, CFRP Fiber Orientation

핵심용어: A17075/CFRP 적층재, 원공노치강도, 유한요소해석, 복합법칙, 원공크기, 섬유배열방향

Abstract

As for the properties on both the aluminum and the CFRP which are used to make A17075/CFRP multi-layered hybrid composites, CRALL(carbon reinforced aluminum laminate). In the CRALL specimen for rule of mixture, we were analyzed notched strength by finite element method. The results obtained from FEM analysis are as follows; In the unnotch CRALL specimen, the stresses CFRP, epoxy, Al 7075 obtained by finite element method strength solution for A/C0001, when strain is 0.28%, are 1400MPa, 38MPa, 411MPa. respectively and for A/C9991, when strain 0.48%, are 392MPa, 26MPa and 321Mpa, respectively. the solpe of the stress-strain curve by FEM increases in keeping with the hole size and the yield strain decrease to 36% and 55% for A/C9993 and A/C9991 respectively.