電子線モアレ法によるファイバー周辺の残留応力測定(J09-2 光ファイバ・光利用,J09 知的材料・構造システム)

概要

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A method to measure the residual stress at the interface of the fiber reinforced composites presented in this study. The residual strains (stresses) at the interface are released by pushing the fiber out. The released residual strains are measured using an electron moire technique, which can fabricate grids with, frequencies up to 10,000 lines/mm on the composites surface so that a displacement sensitivity of lOOnm can be achieved. This method can be applied to almost all fiber-reinforced composites, such as fiber-reinforced plastics (FRPs). It provides a new experimental technique for measuring interfacial residual stress in FRPs. Measurements of the interfacial residual stress in SiC/Ti-15-3 and boron/epoxy composites show the validity of the method.
2004-09-04