Analysing Effect of Direction of Layups to Distortions of Laminated Carbon Fibre-Reinforced Composites

Dharu Feby Smaradhana


The distortions of the laminates (flat panels and channel sections) with different stacking sequences were investigated in this lab session. There were two methods compared, measurement of the experimental specimens and prediction using classical laminate theory. The experimental results showed that the specimens with layup (90,03) and (03,90) had the largest curvature. The spring forward/back angles of the measurement was higher than those of the prediction though the trends of the distortions of the channel and the flat specimens were almost similar. There were several factors affecting distortions such as the tool thermal expansion, chemical shrinkage, the arrangement of vacuum bag and edge effects.

Full Text:



C. Albert and G. Fernlund, “Spring-in and warpage of angled composite laminates,” Compos. Sci. Technol., vol. 62, no. 14, pp. 1895–1912, 2002.

C. Outline, “Chapter 2 Warpage of Large Curved Composite Panels,” pp. 3–59.

J. L. O. and D. Lemoine, “Experimental study of spring forward in cured laminated U-channels made from unidirectionally reinforced carbon fibre-epoxy prepregs,” 1998.

R. M. Jones, Mechanics of composite materials, 2nd ed. London: Taylor & Francis, 1999.

C. Buchmann, S. Langer, J. Filsinger, and K. Drechsler, “Analysis of the removal of peel ply from CFRP surfaces,” Compos. Part B Eng., vol. 89, pp. 352–361, 2016.

M. L. Dano and M. W. Hyer, “Snap-through of unsymmetric fiber-reinforced composite laminates,” Int. J. Solids Struct., vol. 39, no. 1, pp. 175–198, 2001.

S. Pagliuso, “Warpage, a nightmare for composite parts producers.pdf.” ICCM-IV, Tokyo, 1982.

D. W. RADFORD, “Cure shrinkage induced warpage in flat uni-axial composites,” Journal of composites technology & research, vol. 15, no. 4. pp. 290–296, 1993.

H. W. Wiersma, L. J. B. Peeters, and R. Akkerman, “Prediction of springforward in continuous-fibre/polymer L-shaped parts,” Compos. Part A Appl. Sci. Manuf., vol. 29, no. 11, pp. 1333–1342, 1998.


  • There are currently no refbacks.