ガラス繊維分散強化複合材料の疲労破壊に関する微視力学的研究

抄録

The present paper is concerned with the fatigue of a short glass fiber reinforced SMC composite. The fatigue tests were carried out on single-edge notched specimens of the SMC composite under cyclic uniaxial tensile loading. First, the macroscopic feature of the damage near the notch front is discussed together with the variation of the compliance of the specimen. After that, the microscopic fracture mechanism is considered in view of the results of the spectrum analysis of the AE signals detected during the fatigue tests and the SEM observation of the fractured surfaces. On the basis of this knowledge, a reasonable explanation of the microscopic fracture of the SMC composite under fatigue loading is presented.