Browse > Article
http://dx.doi.org/10.3795/KSME-A.2002.26.7.1416

Effects of Combined Environmental Factors on Mechanical and Thermal Analysis Properties of Graphite/Epoxy Composites  

Lee, Sang-Jin ((주)한국화이바)
Lee, Jong-Keun (금오공과대학교 고분자공학과)
Yoon, Sung-Ho (금오공과대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.26, no.7, 2002 , pp. 1416-1425 More about this Journal
Abstract
In this study, the effects of combined environmental factors on mechanical and thermal analysis properties of graphite/epoxy composites were evaluated by the use of an accelerated aging test. Environmental factors such as temperature, moisture. and ultraviolet were considered. A xenon-arc lamp was utilized for ultraviolet light. and exposure times of up to 3000 hours were applied. Several types of specimens - tensile. bending, and shear specimens those are transverse to the fiber direction, and bending specimens those are parallel to the tiber direction - were used to investigate the effects of environmental factors on mechanical properties of the composites. Also, glass transition temperature, storage shear modulus, loss shear modulus, and tan ${\delta}$ were measured as a function of exposure times through a dynamic mechanical analyzer. In addition. a suitable testing method for determining the effect of environmental factors on mechanical properties is suggested by comparing the results from using two different types of strain measuring sensors. Finally, composite surfaces exposed to environmental factors were examined using a scanning electron microscope.
Keywords
Accelerated Aging Test; Combined Environmental Factors; Mechanical Properties; Thermal Analysis Properties; Dynamic Mechanical Analyzer;
Citations & Related Records
연도 인용수 순위
  • Reference
1 ASTM G26-90, 1998, Annual Book of ASTM Standards, 08.01, American Society for Testing and Materials
2 ASTM D3039/D3039M-95, 1998, Annual Book of ASTM Standards, 08.01, American Society for Testing and Materials
3 ASTM D790-92, 1998, Annual Book of ASTM Standards, 08.01, American Society for Testing and Materials
4 ASTM D5379/D5379M-93, 1998, Annual Book of ASTM Standards, 08.01, American Society for Testing and Materials
5 Dally, J. W. and Riley, W. F., 1978, Experimental Stress Analysis, McGraw-Hill Inc
6 Akay, M., 1993, 'Aspects of Dynamic Mechanical Analysis in Polymer Composites,' Composites Science and Technology, Vol. 47, pp. 419-423   DOI   ScienceOn
7 Larsson, F., 1986, 'The Effect of Ultraviolet Light on Mechanical Properties of Kevlar 49 Composites,' Journal of Reinforced Plastics and Composites, Vol. 5, pp. 19-22   DOI   ScienceOn
8 Tang, J. M. and Springer, G. S., 1988, 'Effects of Moisture and Temperature on the Compressive and Short Beam Shear Properties of Fiberite T300/976 Fabric,' Journal of Reinforced Plastics and Composites, Vol. 7, pp. 120 - 134   DOI   ScienceOn
9 Choi, N. S., Takahasi, K., Oschmann, D., Karger-Kocsis, J., and Friedrich, K., 1998, 'Influence of Weathering on Un-reinforced and Short Glass Fiber Reinforced Thermoplastic Polyester,' Journal of Material Science, Vol. 33, pp. 2529 - 2535   DOI   ScienceOn
10 Hong, S. H., Shin, K. B., Jung, B., Hwang, T. G., Kim, J. S., Kim, C. G., and Hong, C. S., 1998, 'Prediction of Long-Term Performance of a Composite Material Using Accelerated Environmental Test,' Journal of the Korean Society for Composite Materials, Vol. 11, No.5, pp.1-13
11 GangaRao, H. V. S., Burdine, E., and Vijay P. V., 1998, 'Accelerated Aging Response of Carbon Composite Under Tension and Bending,' Proc. of the 8th International Offshore and Polar Engineering Conference, Vol. 4, Montreal, Canada, pp. 219-223
12 Baker, D. J., 1994, 'Ten-Year Ground Exposure of Composite Materials Used on the Bell Model 206L Helicopter Flight Service Program,' NASA Technical Paper 3468