| 摘要 |
PROBLEM TO BE SOLVED: To provide an advanced grid structure having a high strength and a low thermal expansion characteristic. SOLUTION: The advanced grid structure comprises, a first grid side group which extends in the same direction as that of a first tape prepreg group and constitutes one side of a grid group, a second grid side group which extends in the same direction with that of a second tape prepreg group and constitutes one side of a grip group, and a third grid side group which extends in the same direction as that of a third tape prepreg group and constitutes one side of a grid group, wherein a structure ratio obtained by dividing a grid side width by an interval between the central point of a region crossed at the second grid side group and the third grid side group and the central point of the region obtained by crossing the second grid side group nearest the region thus crossed with the central point of the region crossed at the third grid side group and the third grid side group is larger than 0 and 0.107 or less, and the tensile elastic modulus of the carbon fiber is 280 GPa or more and 330 GPa or less. COPYRIGHT: (C)2009,JPO&INPIT |
