玻璃纤维竿直曲的力学原理决定了制造这种竿首先应强调柔韧性,而不是坚硬性。纤维竿坚硬得不能弯曲是无用的,但过分柔韧也免不了因受过量的压力而折断。每一根纤维竿不论其制造如何,均可按其临界负荷进行分级。临界负荷是指竿子的一端向竿的中心用力,迫使竿子达到最大弯曲而不 The mechanics of straight fiberglass rods determine that the manufacture of such rods should first emphasize flexibility rather than rigidity. It is useless that fiber rods are hard to bend, but too flexible is inevitably broken by excessive pressure. Each fiber rod, regardless of its manufacture, can be rated for its critical load. Critical load refers to the end of the pole to the center of the pole, forcing the pole to reach the maximum curvature and not