Curvature tailoring of unsymmetric laminates with an initial curvature

An unsymmetric laminated composite having bi-stability is interesting as a morphing structure because it can sustain large deformation without energy supply and the deformed state is stable. Especially, inducing different curvature values at each stable state is important for the practical application of unsymmetric laminates. In this study, we propose a method for tailoring the curvature of unsymmetric cross-ply laminates by curing the composite on a curved tool plate. The results show that the final normal curvature tensor of unsymmetric laminates is the summation of the tool plate curvature tensor and the normal curvature tensor of the laminates.

[1]  Maenghyo Cho,et al.  A Study on the Room-Temperature Curvature Shapes of Unsymmetric Laminates Including Slippage Effects , 1998 .

[2]  C. Gauss,et al.  General investigations of curved surfaces , 1902 .

[3]  Kyu-Jin Cho,et al.  Design & analysis a flytrap robot using bi-stable composite , 2011, 2011 IEEE International Conference on Robotics and Automation.

[4]  C. Hong,et al.  Effect of residual shear strain on the cured shape of unsymmetric cross-ply thin laminates , 1990 .

[5]  Marc R. Schultz,et al.  A Concept for Airfoil-like Active Bistable Twisting Structures , 2008 .

[6]  Michael W. Hyer,et al.  Thermally-induced deformation behavior of unsymmetric laminates , 1998 .

[7]  W. Jun,et al.  Cured Shape of Unsymmetric Laminates with Arbitrary Lay-Up Angles , 1992 .

[8]  Zhengneng Li,et al.  Cured Shape of Cross-Ply Composite Thin Shells , 2003 .

[9]  Michael W. Hyer,et al.  Calculations of the Room-Temperature Shapes of Unsymmetric Laminatestwo , 1981 .

[10]  Keith A. Seffen,et al.  ‘Morphing’ bistable orthotropic elliptical shallow shells , 2007, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[11]  Paul M. Weaver,et al.  Multistable composite plates with piecewise variation of lay-up in the planform , 2009 .

[12]  Maenghyo Cho,et al.  Non-linear analysis of the curved shapes of unsymmetric laminates accounting for slippage effects , 2003 .

[13]  Sergio Pellegrino,et al.  Bistable prestressed shell structures , 2004 .

[14]  Michael W. Hyer,et al.  The Room-Temperature Shapes of Four-Layer Unsymmetric Cross-Ply Laminates , 1982 .

[15]  S. Guest,et al.  Prestressed Morphing Bistable and Neutrally Stable Shells , 2011 .

[16]  J. Reddy.  Mechanics of laminated composite plates and shells : theory and analysis , 1996 .

[17]  Paul M. Weaver,et al.  Concepts for morphing airfoil sections using bi-stable laminated composite structures , 2008 .