Time-dependent out-of-plane deformation of UD-CFRP in humid environment

Time-dependent out-of-plane deformation of UD-CFRP (unidirectional CFRP laminate) caused by subjection to a humid environment was examined and analyzed. The UD-CFRP plate showed unpredictable geometrical variation with time in a humid environment, like asymmetric materials. The unpredictability was caused by non-uniform fiber distribution in the thickness direction of the specimen. A three-dimensional diffusion-stress coupling analysis considering the non-uniform fiber distribution was conducted based on finite element analysis. The analytical results showed very good agreement with the experimental results. Furthermore, the relationship between the non-uniform fiber distribution and the out-of-plane deformation with time was obtained quantitatively.

[1]  Graham Twigg,et al.  Tool-part interaction in composites processing , 2001 .

[2]  R. Gibson.  Principles of Composite Material Mechanics , 1994 .

[3]  L. Struik,et al.  Physical aging in plastics and other glassy materials , 1977 .

[4]  F. Jacquemin,et al.  A Hygroelastic Self-consistent Model for Fiber-reinforced Composites , 2005 .

[5]  I. Daniel,et al.  Hygroscopic Behavior of Woven Fabric Carbon-Epoxy Composites , 2005 .

[6]  Jérôme Molimard,et al.  Transient and cyclical hygrothermoelastic stress in laminated composite plates: Modelling and experimental assessment , 2007 .

[7]  E. G. Wolff.  Introduction to the Dimensional Stability of Composite Materials , 2004 .

[8]  H. Bansemir,et al.  Fibre composite structures for space applications : recent and future developments , 1998 .

[9]  Steven J. Connell,et al.  Lightweight space mirrors from carbon fiber composites , 2002 .

[10]  D. Stone,et al.  Hygrothermal effects in CFRP laminates: Strains induced by temperature and moisture , 1985 .

[11]  G. Springer,et al.  Moisture Absorption and Desorption of Composite Materials , 1976 .

[12]  Adriaan Beukers,et al.  Residual stresses in thermoplastic composites—A study of the literature—Part I: Formation of residual stresses , 2006 .

[13]  Anoush Poursartip,et al.  Tool–part interaction in composites processing. Part I: experimental investigation and analytical model , 2004 .

[14]  Richard Schapery.  Thermal Expansion Coefficients of Composite Materials Based on Energy Principles , 1968 .

[15]  Carolyne Albert,et al.  Spring-in and warpage of angled composite laminates , 2002 .

[16]  George S. Springer,et al.  Environmental effects on composite materials , 1981 .

[17]  Piggott,et al.  Water Absorption of Resins and Composites: IV. Water Transport in Fiber Reinforced Plastics , 1988 .

[18]  M. Meshii,et al.  Creep of polymer composites , 1998 .

[19]  T. Ozaki,et al.  High precision composite pipes for SOLAR-B optical structures , 2001 .