Abstract
Keywords:
CFRP(Carbon Fiber Reinforced Plastics), Oblique Impact, Critical Penetration Energy
Abstract
CFRP composite laminates have wide application in automobiles, aerospace vehicles and ship for light-weight structures. However, there is a design variable to be considered in practical application of the laminate composite material, that is, this materials is vulnerable to transverse impact. The shape of normal structure is curved shell with various curvature radiuses. When these structures are subjected to shells are different from those of flat-plate. This paper aims at evaluating the effects of curvature and oblique impact on the penetration characteristics of composite laminate shell. They are stacked to [02/902] S ,[03/903]S and [02/903/0]S and their interlaminar two and four. Those specimens were prepared to varied curvature radius(R=100,mm and ∞). First of all, when the specimen is subjected to transverse impact by a steel ball, the velocity of steel ball was measured both before and after impact by determining the time for it to pass two ballistics-screen sensors located a known distance apart. In general, the critical penetration energy increased as curvature increased, interface decreased and slope angle on the impact surface increased.