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[학술저널]

  • 학술저널

윤유성 권오헌

UCI(KEPA) : I410-ECN-0101-2009-550-014783620

초록

Woven fabrics composites are used as primary structural components in many applications because of their superior properties that offer high specific strength and stiffness. However, the complexity of the fabric structure makes understanding of their failure behavior very difficult. Also, laminate woven fabrics CFRP have unique failure mechanisms such as fiber bridging, fiber/matrix crack and so on. In particular, the delamination phenomenon of the composite materials is one of the most frequent failure mechanisms. So, we estimated interlaminar fracture and damage in composites using as ENF specimen by a 3 point bending test. And AE characteristics were examined for crack propagation on plain woven CFRP. We obtained the following conclusions from the results of the evaluation of the 3 point bending fracture test and AE characteristic estimation. AE counts of maximum crack length were obtained as 85.97×10⁴ and 93×10³ for a0/L=0.3 and 0.6, respectively. Also the maximum amplitudes were over 80dB at both a0/L=0.3 and 0.6. GⅡc at that's a0/L ratio were obtained with 1.07kJ/m² and 3.79kJ/m².

목차

Abstract
1. 서론
2. 실험재료 및 실험방법
3. 실험 결과 및 고찰
4. 결론
참고 문헌

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