The Effects of Temperature Change on the Bending Strength of CF/PEEK Laminates after Impact

온도변화가 CF/PEEK 적층재의 충격 후 굽힘강도에 미치는 영향

  • 양인영 (조선대학교 기계정보공학과) ;
  • 정종안 (송원대학 자동차과) ;
  • 나승우 (순천제일대학 차량기계학부)
  • Published : 2003.06.01


In this paper, when CF/PEEK laminates for high efficiency space structure are subjected to FOD(Foreign Object Damage), the effects of temperature change on the impact damages(interlaminar separation and transverse crack) of CF/PEEK laminates and the relationship between residual lift and impact damages are experimentally investigated. Composite laminates used in this experiment are CF/PEEK orthotropic laminated plates, which have two-interlaces [$0^{\circ}_4/90^{\circ}_8/0^{\circ}_4$]. A steel ball launched by the air gun collides against CF/PEEK laminates to generate impact damages. And then CF/PEEK specimens with impact damages are observed by a scanning acoustic microscope under room and high temperatures. In this experimental results, various relations are experimentally observed including the delamination area vs. temperature change, the bending strength vs. impact energy and the residual bending strength vs. impact damage of CF/PEEK laminates.


impact damage;high temperature environment;foreign object damage;transverse crack;delamination;impact energy;residual bending strength


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