Leaf spring made of fiber-reinforced resin

Abstract

Abstract PURPOSE:To improve strength and life of a FRP leaf spring, by a method wherein, in a subject leaf spring which is constituted such that a matrix resin is reinforced by at least two types of reinforcing fibers being different in a Young's modulus, the distinct reinforcing fibers, being different in a Young's modulus, are partially located in the direction of the thickness of a leaf spring, a mixture ratio is changed gradually, and discontinuity of the stress is removed. CONSTITUTION:An FRP leaf spring 11 is constituted such that matrix resin 12 is reinforced by at least two types of reinforcing fibers, being different in a Young's modulus E, for example, carbon fiber C and glass fiber G. The reinforcing fibers C and G being different in a Young's modulus are partially and preponderantly placed in the direction of the thickness of the leaf spring 11 to form three layers. At a boundary part 13 between said carbon fiber layer 11C and the glass fiber layer 11G, the adjacent and distinct reinforcing fibers C and G are mixed for the use to form a mixture layer 11M. In the mixture layer 11M, the mixing ratio of each of the reinforcing fibers C and G changes as time elapses.

Inventors

• 👤 Junichi Hori
• 👤 堀　準一

Bibliographic Details