Article
  • Two Fiber Technique for a Fragmentation Test
  • Moon CK, Mcdonough WG
  • 두 섬유의 Fragmentation Test에 관한 연구
  • 문창권, Mcdonough WG
Abstract
The single fiber fragmentation test has been modified by embedding multiple fibers into polyisocyanurate resin of dogbone shape. We were able to examine the interfacial shear strength between the fibers and the resin from the test. In addition, the time-dependant nature of the fragmentation test process was considered. We found that the failure profiles of the two fibers of more than 400㎛ apart were similar to the failure profiles from single fiber tests. When we examined three fibers, we found that measured interfacial shear strength values were much greater than the shear strength values obtained from either single or two fiber tests. Consequently, whenever the interfiber spacing was too small, breaks in one fiber have possibility to influence the breaks in the adjacent fibers. We also found that the number of fiber breaks at each strain increased with increasing time and then leveled off.

섬유와 수지와의 계면전단강도의 평가를 위해 fragmentation 시험에서 dogbone형의 한 시험편에 다섬유를 이용한 방법을 검토하였으며, 또 fragmentation 시험 과정에서 각 연신율에서 섬유 파괴수의 시간 의존성에 관하여 비교 검토하였다. 그 결과, 두섬유를 사용했을 때의 계면전단 강도는 단섬유를 사용했을 때와 거의 같은 결과를 얻었지만, 세섬유를 사용했을 경우에는 단섬유 또는 두섬유를 사용했을 때보다 매우 큰 값을 얻었다. 그것은 섬유의 간격이 너무 작을 때는 한가닥의 섬유파괴가 인접 섬유의 파괴를 유발시키기 때문이다. 그리고 시험 과정에서 각 연신율에서 섬유의 파괴수는 시간의 경과와 같이 증가한 후에 포화하였다.

Keywords: fragmentation test; interfacial shear strength; fiber break number

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1995; 19(6): 835-845

    Published online Nov 25, 1995