Influence of thermal history on transverse cracking in a carbon fiber reinforced epoxy composite

被引：19

作者：

Ogi, Keiji ^{[1
]}

机构：

[1] Dept. of Mat. Sci. and Engineering, Faculty of Engineering, Ehime University, Matsuyama, Ehime 790-8577

来源：

Advanced Composite Materials: The Official Journal of the Japan Society of Composite Materials | 2002年 / 11卷 / 03期

关键词：

Carbon/epoxy; Mechanical properties; Post-cure; Thermal history; Transverse cracking;

D O I：

10.1163/156855102762506308

中图分类号：

学科分类号：

摘要：

This paper presents the influence of thermal history on transverse cracking in carbon fiber reinforced epoxy (carbon/epoxy) composites. At first, measurement of micro-Vickers hardness and Fourier transform-infrared spectrum (FT-IR) analysis of resin are conducted to investigate the effect of thermal history on resin. Secondly, shrinkage strain and transverse strength are measured for carbon/epoxy unidirectional laminates. Thirdly, the effect of temperature and duration of thermal history on transverse cracking in cross-ply laminates is experimentally investigated. The change in the residual stress due to post-cure is also estimated for the cross-ply laminates. Transverse cracking in the cross-ply specimens after thermal history initiates at lower stresses than the critical stresses in virgin specimens. It is found that thermal history increases the hardness of resin; however, it does not change the chemical structures in resin. The decrease in the strength is mainly caused by degradation of the fiber/matrix interface.

引用

页码：265 / 275

页数：10

共 10 条

[1]

Kim H.S., Ogi K., Matsubara T., Wang W.X., Takao Y., Microscopic damages of quasi-isotropic carbon/epoxy laminates under various temperatures, J. Soc. Mater. Sci. Japan, 47, pp. 599-605, (1998)

[2]

Ogi K., Kim H.S., Maruyama T., Takao Y., Influence of hygrothermal conditions on the damage processes in quasi-isotropic carbon/epoxy laminates, Compos. Sci. Technol., 59, pp. 2375-2382, (2000)

[3]

Ogi K., Takao Y., Evolution of transverse cracking in CF/epoxy cross-ply laminates under creep loading, J. Reinf. Plast. Compos., 13, pp. 220-230, (1999)

[4]

Ogi K., Takao Y., Time-dependent behavior of deformation and transverse cracking in cross-ply laminates, Adv. Composite Mater., 10, pp. 39-62, (2001)

[5]

Lindsey K.A., Rudd C.D., Effects of post-cure on the interfacial properties of glass fiber-urethane methacrylate composites, J. Mater. Sci. Lett., 12, pp. 894-897, (1993)

[6]

Tucker R., Compston P., Jar P.-Y.B., The effect of post-cure duration on the mode I interlaminar fracture toughness of glass-fibre reinforced vinylester, Composites Part A, 32, pp. 129-134, (2001)

[7]

Hwang J.-R., Lee A.-S., Thermal damage effects on mode II interlaminar fatigue crack propagation of graphite/epoxy composites, Compos. Struct., 27, pp. 389-393, (1994)

[8]

Crasto A.S., Kim R.Y., On the estimation of shrinkage and thermal strains during composite cure, Proc. 8th Japan-US Conf Compos. Mater., pp. 813-822, (1998)

[9]

Ogi K., Effect of post-cure on mechanical properties of CF/epoxy composites, J. Soc. Mater. Sci. Japan, 51, 5, pp. 518-523, (2002)

[10]

Tomita Y., Morioka K., Iseki T., Nakahori S., Environmental effect on strength and fracture of advanced CFRP composite, J. Soc. Mater. Sci. Japan, 50, pp. 1196-1200, (2001)

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