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Impact Damages and Residual Strength of CFRP Laminates under the Hygrothermal Environment

고온.고습 환경에서 CFRP 적층재의 충격손상와 잔류강도

  • 정종안 (송원전문대학 자동차과) ;
  • 양인영 (조선대학교 기계설계공학과)
  • Published : 1996.12.01

Abstract

This study is to investigate experimentally relationships between the impact energy and moisture absorption characteristies vs.the residual bending strength with the variation of stacking seqences. When Carbon-fiber reinforced plastics(CFRP) impact-induced laminates are subjected to the high temperatures and hygrothermal effects, it is found that what CFRP laminates are impacted by a steel ball (5 mm in diametar) ; thus, the generated delamination is observed by the ultrasonic microscope. And the residual bending strength is evaluated by a three-point bending test. Also, a thermostat is used in test with the unimpacted and impacted specimens for the moisture experimentaiton. The percision electro lever scles is used to measure the moisture content(1/10, 000g).

Keywords

Carbon Fiber Plastics;Hygrothermal Effect;Impact Damage;Residual Strength;Elastic Modulus;Moisture Content;Diffusion Coefficient